5C - Recommendation to City Council on an ordinance amending the Design and Construction Standards - work are traffic control and stadards for transportation improvements
CITY OF BOULDER
PLANNING BOARD AGENDA ITEM
MEETING DATE: July 16, 2009
AGENDA TITLE: Public hearing and consideration of a recommendation to City Council on
an ordinance amending the Boulder Revised Code, 1981 and the Design and Construction
Standards related to work area traffic control and standards for transportation improvements.
REQUESTING DEPARTMENT:
Maureen Rait, Executive Director of Public Works
Tracy Winfree, Director of Public Works for Transportation
Mike Gardner-Sweeney, Transportation Operations and Planning Coordinator
Bill Cowern, Transportation Operations Engineer
Jeff Arthur, Engineering Review Manager
EXECUTIVE SUMMARY:
Staff is requesting a recommendation from Planning Board to City Council on an ordinance
amending sections of the Boulder Revised Code, 1981 and the Design and Construction
Standards. Changes primarily relate to standards for traffic control associated with both city and
development related construction projects as well as other work zones. Additional minor
clarifications to other transportation standards have been incorporated into the update package.
ANALYSIS:
Background
The city's Design and Construction Standards (DCS) were developed to regulate the design and
construction of public infrastructure, improvements, and landscaping in the city's public rights-
of-way and public easements. The DCS is adopted by ordinance under Title 9 of the B.R.C.,
1981 (BRC) and requires Planning Board consideration and a recommendation to City Council
prior to amendment. Amendments to Title 8 of the BRC do not require a Planning Board
recommendation, but have been included for consideration because they directly relate to the
Title 9 amendments in this case.
Transportation impacts due to construction activity are a common concern for many residents.
Significant public and private projects along major transportation corridors during the past
several years have raised interest among members of the public and the Transportation Advisory
Board about how the city manages associated impacts. In particular, questions have been raised
AGENDA ITEM # 5 C Pate I
about whether work zone traffic control effectively and equitably accommodates all modes of
transportation.
An additional factor in the timing of proposed updates is a new "Lane Closure Strategy" adopted
by the Colorado Department of Transportation Region 4 (CDOT) in 2008. The new strategy
dictates lane closure policies for CDOT highways and could impact the city's flexibility in
implementing work zone traffic control in those rights-of-way. CDOT has agreed in principle to
grant the city a blanket waiver from their policy provided we provide a satisfactory alternative
set of policies and procedures.
The Manual on Uniform Traffic Control Devices (MUTCD) published by the Federal Highway
Administration has been adopted by the city as the standard for work zone traffic control. While
the manual does provide some consideration for alternate modes of transportation, it emphasizes
accommodation of automobiles and provides limited guidance for facilities like multi-use paths,
which are a critical part of the city's transportation network. The manual also provides minimal
guidance on avoiding or prioritizing closures. The lack of written standards has resulted in the
need for significant staff involvement in traffic control plan development as well as financial
impacts to contractors who have not anticipated and budgeted for multimodal accommodations.
Staff has also found that the existing city codes and enforcement protocols are not as effective as
they could be in supporting work zone traffic control compliance. As an example, a "stop work
order" is not an effective tool to address an unauthorized lane closure during rush hour if the
work is complete before an inspector can respond.
Proposed Work Zone Traffic Control Changes
Proposed changes include more specific standards for development and implementation of work
zone traffic control plans as well as changes to regulatory language that would expand potential
enforcement options.
Work zone traffic control plan standards have been added as a new section in the DCS. The
standards continue to adopt the MUTCD, but add supplementary requirements to better address
impacts to alternative modes of transportation. In particular, the proposed standards include a
section on "Nonstandard Closures" that establishes thresholds and requirements for traffic
control setups that require more detailed applicant analysis and staff review. For example, work
impacting multi-use paths or transit facilities would require supporting analysis of avoidance and
minimization options and mitigation beyond MUTCD standards.
Proposed changes to the BRC are primarily clarifications and administrative changes to support
the updated DCS. In a number of locations, the word "permittee" has been replaced with broader
language such as "person" or "person performing work" This language is to better address work
that does not require a permit, but may still impact a transportation facility. For example, since
utility companies like Xcel and Qwest may be exempt from permitting for some
operations/maintenance activities, the revised language clarifies that they are still required to
provide adequate traffic control and are subject to enforcement remedies if they fail to do so.
AGENDA ITEM # 5C Page 2
Because most requirements are already being implemented to some degree under existing
standards, staff is not anticipating a significant increase in the burden for contractors. Improved
documentation of requirements should provide a better opportunity for contractors to understand,
plan, and budget for traffic control in advance of actually applying for a permit to perform work
in the public right-of-way. Costs associated with preparing and implementing traffic control
plans will continue to remain higher than in communities with a lesser focus on alternate modes.
Other Proposed Changes
Public Works staff compiles potential changes to the BRC and DCS on an ongoing basis and
generally forwards changes for Planning Board and City Council consideration in packages of
updates. Concurrent with the work zone traffic control updates, staff is proposing adoption of a
number of other minor transportation updates. Similar to work zone traffic control, the changes
are not significant departures from current practices, but are intended to more clearly document
requirements.
A significant number of the proposed changes relate to compliance with the Americans with
Disabilities Act (ADA). The DCS requires compliance with ADA and states that the more
restrictive standard applies in the case of conflicting standards. Staff has used this provision to
maintain ADA compliance in cases where city standards have become outdated. Proposed
updates will eliminate current conflicts to clarify requirements for users.
Other changes are primarily intended to clarify conflicting or confusing language. For example,
dimensions for on-street bike lanes are not consistent throughout the DCS and use different
measuring points (face of curb, edge of gutter pan, edge of parking space). The standards have
been revised to specify a five-foot width. The standard for maximum street slopes currently
contains both a standard maximum (5 percent) and higher maximum based on topography (8
percent) without specific guidance on when the higher standard is appropriate. Staff is proposing
to eliminate the 8 percent reference and utilize the variance procedure already contained in the
DCS for situations where topography or other constraints necessitate steeper slopes.
There are numerous other changes to the DCS currently under consideration that have not been
included in the proposed updates because they require further refinement by staff and/or public
process. Staff will continue to bring forward changes as they become ready for consideration.
PUBLIC COMMENT AND PROCESS:
Staff has solicited feedback on proposed changes to standards for work zone traffic control from
a variety of stakeholders including the Colorado Department of Transportation, Boulder County
Transportation, CU-Boulder, Boulder Valley School District, Community Cycles, Walk Boulder,
Boulder Housing Partners, Qwest Communications, and Xcel Energy. Several companies
specializing in developing and implementing traffic control plans have also been contacted.
Preliminary materials were presented to the Planning & Development Services Advisors Group
on March 4, 2009. This group consists of a variety of stakeholders including local developers,
architects, engineers, and contractors.
AGENDA ITEM # 5. C Pate 3
The Transportation Advisory Board (TAB) has had ongoing involvement in the development of
the proposed standards, including discussion at meetings in December 2007, July 2008, and
February 2009. A public hearing was held on May 11, 2009 to request a recommendation from
TAB on proposed changes. TAB feedback was primarily focused on ensuring that all modes of
transportation receive appropriate consideration in traffic control plans. In particular, feedback
reflected a concern that automobiles are given preferential treatment in work zones. TAB voted
5-0 to approve proposed changes, but recommended that an expanded intent section or preamble
restating language from the Transportation Master Plan (TMP) be added to the DCS section on
temporary traffic control plans. TAB recommended that the section include language stating that
all closure signage give each group appropriate advanced notice of required detours, that safety
of each user groups drives all decisions, and that inconvenience is no greater for bikes and
pedestrians than motorist. Meeting minutes and the complete motion language are included as
Attachment E.
Staff has reviewed TAB's recommendation and made several changes to the staff
recommendation. A new section titled "Transportation Master Plan" has been added to the
standards for Temporary Traffic Control Plans that indicates that plans must be consistent with
TMP goals, policies, and standards. The "Objectives" section has also been updated to include
language related to equitable treatment of modes and prioritization consistent with the TMP.
Staff recommends that specific language and policies contained in the TMP not be restated in
full within the DCS. The focus of the DCS is on detailed standards rather than broader policies.
Combining the two could make implementation and interpretation more difficult and could
create future conflicts between redundant sections. Staff will be developing a handout for
contractors that will integrate the standards, policies, and regulations that are distributed across
the DCS, TMP, and BRC into a comprehensive document.
STAFF RECOMMENDATION:
Staff recommends that Planning Board make a recommendation to City Council to amend the
Boulder Revised Code and the Design and Construction Standards related to work area traffic
control and standards for transportation improvements as provided in Attachments A through D.
AGENDA ITEM # 5.0 Pape 4
ATTACHMENTS:
A. Proposed ordinance amending Sections 2-2-11, 9-2 and 8-5 of the Boulder Revised Code,
1981
B. Proposed ordinance amending the Design and Construction Standards
C. Proposed revisions to Chapter 1, Chapter 2, Chapter 8, Chapter 11, and Glossary of the
Design and Construction Standards
D. Proposed revisions to Design and Construction Standards detail drawings
E. Transportation Advisory Board Meeting Summary Form
AGENDA ITEM # 5 _Si Page 5
ATTACHMENT A
ORDINANCE NO.
AN ORDINANCE AMENDING SECTION 2-2-11,
"TRAFFIC ENGINEERING, CHAPTER 8-2,
"STREETS AND SIDEWALKS," AND
CHAPTER 8-5, "WORK IN THE PUBLIC RIGHT
OF WAY AND EASEMENT
ENCROACHEMENTS," B.R.C. 1981, TO
IMPLEMENT STANDARDS RELATED WORK
AREA TRAFFIC CONTROL AND SAFTEY
STANDARDS, AND SETTING FORTH
RELATED DETAILS.
BE IT ORDAINED BY THE CITY COUNCIL OF THE CITY OF BOULDER,
COLORADO:
Section 1. Paragraph 2-2-11(b)(13), B.R.C. 1981, is amended to read:
Section 2-2-11 Traffic Engineering.
(b) In addition to other duties prescribed by this code or other ordinances of the city, the city
manager may, without limitation:
(13) Close or prescribe methods for handling traffic impacts on streets during civil emergencies}
and-construction projects, or other activities impacting the public rights of way or easements;
Section 2. Section 8-2-11, B.R.C. 1981, is amended to read:
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Section 8-2-11 Duty To Maintain Walkway Around Obstructed Portions Of Sidewalks.
Whenever in the construction, rebuilding, or repairing of any building or structure it is necessary
to blockade, obstruct, or remove the adjacent sidewalk, no person in charge of such work shall
fail t
4-980 provide an appropriate alternative pedestrian facility meeting the requirements of the City
of Boulder Design and Construction Standards, around the obstructed portion of such sidewalk.
Section 3. Section 8-5-1, B.R.C. 1981, is amended to read:
Section 8-5-1 Legislative Intent.
The purpose of this chapter is to regulate the placement of structures and infrastructure,
construction, excavation, encroachments, and work activities within or upon any public right of
way or public easement, to assure public safety and to protect the integrity and operation of the
transportation system. To achieve this purpose, it is necessary to establish standards for any work
activity, -require permits, to establish permit procedures, and to fix and collect fees and charges.
This chapter is intended to balance the public objectives for providing efficient, safe
transportation routes with the use of public rights of way for city-owned and non-city-owned
public utilities, including:
(a) Ensuring that the public safety is maintained and that public inconvenience is minimized.
(b) Protecting the city's investment in its infrastructure by establishing repair standards for
surface improvements and pavement when work is accomplished.
(c) Facilitating work within the right of way and public easements through the adoption and
implementation of standards for regulating the placement and construction of infrastructure
and defining actions for balancing work activity impacts with the public need for
transportation access and mobility.
(d) Maintaining an efficient permit process.
(e) Conserving the limited physical capacity of the public rights of way and public easements
held in public trust by the city.
(f) Assuring that the city can continue to fairly and responsibly protect the public health, safety,
and welfare.
Section 4. Section 8-5-2, B.R.C. 1981, is amended by the amendment and addition of the
following definitions, to read:
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Section 8-5-2 Definitions.
The following terms used in this chapter have the following meaning, unless the context fully
indicates otherwise:
"Permittee" means the holder of a valid permit, any subcontractor, or other person that is doing
any work authorized by a permit issued pursuant to this chapter.
"Temporary traffic control zone" means an area of the public right of way where transportation
conditions are changed for pedestrians- bicyclists- transit, or motorists because of work, a work
activity or incident by the use of temporary traffic control devices or personnel including without
limitation. barricades. traffic signer traffic sitnals, flaggers, law enforcement or emergency
operations officers, or other authorized nersormel.
"Temporary traffic control plan" means a method for handling traffic prepared under the
supervision of a traffic control supervisor in accordance with the requirements of the City of
Boulder Design and Construction Standards and implemented under the supervision of a traffic
control supervisor or traffic control technician in conformance with Section 8-10. "Temporary
Traffic Control."
"Traffic control supervisor or technician" means a person that has been certified as a traffic
control supervisor or technician by the American Traffic Safety Services Association or a person
with similar qualifications that has been approved by the citvinarnaeer.
Section 5. Section 8-5-3, B.R.C. 1981, is amended to read:
Section 8-5-3 Permit Required for Work in the Public Right of Way and Public Easements.
(a) Work in Right of Way or Public Easement Prohibited Without Permit: No person shall
undertake or permit to be undertaken any work in the public right of way or a public
easement without first obtaining a permit from the city as set forth in this chapter, unless
such work is exempt under the provisions of section 8-5-17, "Work In The Public Right of
Way Or Public Easement Exempt From Required Permit," B.R.C. 1981, or involves
sidewalk construction as permitted under section 8-2-18, "Permit For Sidewalk Construction
Required," B.R.C. 1981.
(b) Display of Permit: No pers MTlieT e shall fail to maintain tleapplicable permits,
including without limitation- a right of way permit, state highway permit,
floodplain
development permit, wetland permit, and temporary traffic closure authorization. -along
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with associated rho e~ct documents including without limitation. -the-approved engineering
construction drawings or site plans, and applieab4ea temporary -traffic control plan. and a -of
stormwater quality best management practices er-esi~ plans, on the job site. -ate
aAll documents shall be made available for inspection upon request by any officer or
employee of the city.
(c) Work Consistent with the Permit: No permittee shall work in an area larger or at a location
different from that specified in the approved permit. If it becomes necessary to work in a
larger or different area than originally requested under the application, the permittee shall
obtain authorization from the city manager, prior to proceeding with the work. The
pennittee shall submit Ret: i, the city manager and file a supplementary application for the
additional work within twenty-four hours.
(d) Permits are not Transferrable: Permits shall not be transferable or assignable. The permittee
may subcontract the work to be performed under a permit provided that the holder of the
permit shall be and remain responsible for the performance of the work under the permit and
provide all insurance and financial security as required.
Section 6. Section 8-5-4, B.R.C. 1981, is amended to read:
Section 8-5-4 Permit Application.
An applicant for a permit to work in the public right of way or public easement under this section
shall file a written application on a form provided by the city manager that includes the
following:
(a) The date of application; the name and address of the applicant; the name and address of the
developer, contractor or subcontractor licensed to perform work in the public right of way;
the exact location of the proposed work; the type of existing public infrastructure including
es; without limitation, street pavement, curb and gutter, sidewalks bicycle facilities- transit
facilities- narking meters or kiosks, traffic signs or pavement markings. or utilities impacted
by the work; the purpose of the proposed work; the dates for beginning and ending the
proposed work; the measurements, quantities, itemization and total cost, including labor and
materials, of the construction improvements and excavations for improvements that are to be
owned and operated by the City of Boulder; and type of work proposed.
(b) Engineering construction drawings or site plans for the proposed work.
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(c) A saHSfaeterytgnuorary traffic controlrand a erosion preteetien stormwater quality best
management practices plan that comply with the requirements of the City of Boulder
Design and Construction Standards for the proposed work.
(d) Evidence that the applicant has an effective license, including, without limitation, required
insurance, deposits, bonding, and warranty to perform work in the public right of way or
public easement, as prescribed under chapter 4-6, "Contractor in the Public Right of Way
License," B.R.C. 1981.
(e) A satisfactory plan of work, showing protection of the subject property and adjacent
properties including the protection of shade and ornamental trees and the restoration of turf.
(f) Evidence that the applicant or its contractor is not delinquent in.payments due the city on
prior work, and that all orders issued by the city to the applicant, requiring the applicant to
correct deficiencies under previous permits issued under this chapter, have been satisfied.
(g) Evidence that any financial guarantee required under section 9-2-20, "Required
Improvements and Financial Guarantees," or 9-12-13, "Subdivider Financial Guarantees,"
B.R.C. 1981, have been provided in connection with the approved subdivision, site plan, or
engineering construction drawings.
(h) Documentation that all permits required for the proposed work have been obtained
including, without limitation, floodplain development permits, wetland permits, state
highway access or utility permits, revocable right of way permits, and sewer and water
utility permits.
(i) Pay the fees prescribed by section 4-20-6, "Public Right of Way Permit and Contractor
License Fees," B.R.C. 1981.
Section 7. Section 8-5-8, B.R.C. 1981, is amended to read:
Section 8-5-8 Public Safety And Nuisance.
(a) zResponsibilities: No person shall violate any condition contained in a permit
No person who obtains a "°fmi` £ ° works in the public right of way or public easement
shall fail to maintain a safe work area, free of nuisance conditions. If the-pertnitwesaid
eo rson fails to provide a safe work area free of hazards or nuisance conditions, the city may
issue an order to make any repair necessary to eliminate any hazards or nuisances.
(b) Failure To Comply: If'eeanv uerson fails to correct a hazard or a public nuisance
caused by such uerson, the city may issue a stop work order and make any repair necessary
to eliminate such hazard or public nuisance. Any such work performed by the city shall be
billed to n4ttee1aid person at overtime rates. The permittee-person responsible for
causing -the hazgd= or nuisance shall pay all such charges within thirty days of the statement
date. If the permittee-said person fails to pay such charges within the prescribed time period,
the city may, in addition to taking other collection remedies, seek reimbursement through
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the warranty guarantee. Furthermore, the pemAi#ee said nerson shall be barred from
performing any work in the public right of way or public easement, and under no
circumstance will the city issue any further permits of any kind to said pefff4Re~RgLson until
such time that all outstanding charges have been paid in fall. This remedy is in addition to
any criminal action which the city may bring or pursue for violation of the chapter.
Section 8. Section 8-5-10, B.R.C. 1981, is amended to read:
Section 8-5-10 T MpRrarv Traffic Control.
Thepe No nerson -shall- perform any work in a public right of way or public easement
without previdenroviding -temporary traffic control measures to mitigate transportation impacts
affecting all modes of travel, including pedestrian, bicycle, transit, or vehicles. No person shall
initiate an work in the public right of way or public easements without meeting the following
requirements: en the ei4ation system that inelede the fbllawing°
(a) Temporary Traffic Control Plan Required: When it is necessary to impede or obstruct
pedestrian, bicycle. transit, or vehicular traffic, a temporary traffic control plan shall be
prepared b a traffic control supervisor in conformance with theManual vn Umifoii_ _ai~dc
Contr~at,l Dev eesCity of Boulder Design and Constrztction Standards and Abe submitted
to the city prior to starting work. Ne pem it will be issued until the plan i reviewed and
approved by the t..
b Access and Movement: No person shall interrupt access to and from private property, block
emergency vehicles, block access to fire hydrants, fire stations, fire escapes, water valves,
underground vaults, valve housing structures, or any other vital equipment unless permission
is obtained from the city manager. Streets, icluding without limitation, vehicle travel lanes.
bicycle lanes- sidewalks, and multi-use paths. -are to remain passable at all times, unless
permissi 3x authorization to close a street or a portion thereof is approved by the city
manager, as prescribed under section 2-2-11, "Traffic Engineering," B.R.C. 1981.14No
e>l rSOt1 shall be the resp nsi17lity --"e pe - Wee ail to notify and coordinate all work in the
public right of way with police, fire, ambulance, and transit organizations.
(bc) Temporary Traffic Warning And Control Devices: Anv nerson implementing
a temporary traffic control plan shall -halt illu ate on the pefmit eprovide all -waming
and traffic control devices proposed for use. ^ t the aireeti°,; of tT_he city manager may
require such warning and control devices shall-bebe increased, decreased, or modified
if traffic impacts or safety concerns for transportation users or workers arise. The anual en
lane ° side calk 44.o peizmitte e shall p ide all traffic central devices.-If used at night,
them porarv traffic control devices ffmst-shall be reflectorized ands illuminated or
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have barricade warning lights. Oil flares of kerosene lant..Fas afe 'mot allowed a F
:n, at ,
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(sd) Flag Person Required: When called for under a temporary traffic control plan. or where
necessary for public safety, the eity manager will regiiire the permittee to empley certified
flag persons shall be employed to implement temporary traffic control measures. The flag
er~-whese-duties shall be to control traffic around or through the eeiistfiietie~
sitstemporarv traffic control zone.
(e) Supervision: A traffic control supervisor or traffic control technician shall be responsible for
implementing a temporary traffic control plan for any temporary traffic control zone.
Section 9. Section 8-5-11, B.R.C. 1981, is amended to read:
Section 8-5-11 Minimizing the Impacts of Work in the Rights of Way and Public
Easements.
(a) Responsibility ^°se: The pe 4RseNo person shall fail to -conduct work in such a
manner as to avoid unnecessary inconvenience and annoyance to the general public and
occupants of neighboring property.
(b) Location of Utilities: Before any pemi4tee- ep rson begins work in any public right of way or
public easement, it shall contact the Utility Notification Center of Colorado and make
inquiries of all ditch companies, utility companies, districts, municipal departments, and all
other agencies that might have facilities in the area of work to determine possible conflicts.
The pertr4tteeNo person -shall fail to contact the Utility Notification Center of Colorado and
request field locations of all facilities in the area at least forty-eight hours in advance of
commencing work.
(c) Protection of Utilities: The pen ssNo person -shall fail to support and protect all
infrastructure, including, without limitation, pipes, conduits, poles, wires, or other apparatus
which may be affected by the work from damage during construction performance of the
work, or settlement of trenches subsequent to construction.
(d)
5:00 p.pa. No wer4~ shall be peffemied ner shall an), traffie. la-ve be G-1-0-SOd W tFaffie diffiR
tl4e, IqAurs of 74)() a.m. to &00 a.ffi, or 4:30 p.m. to 5:00 p.m. E)a streets designate'
eity manager. Ganstnac4ien hours may be f6fther modified by the eity fneiiager to minimize
..trueti..e ff ":rc t appr.,1:.."trrazsc:ro...,
......~u...+ Nv.,~,-r.
(e}-After Hours Work: The applieafAWork activity performed in the public right-aL of way or
public easements may occur between the hours of 7:00am and 5:00pm. A person may
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request permission to perform work before 7:00ain or after 5:OOnm afte
asHvit-y-in a public right of way or public easement, subject to city approval considering the
type of work to be performed, the public necessity to have the work performed outside of
normal hours, and the potential inconvenience or annoyance the work may have on the
general public and occupants of neighboring property. Any approval to permit after--hours
construction tinter ea right of w .,struetion r . mit shall be subject to approval
of a sound level variance, if necessary, prescribed under chapter 5-9, "Noise," B.R.C. 1981,
and the applicant's agreement to pay the fee for after hours inspection prescribed under
subsection 4-20-6(g), B.R.C. 1981.
(et) Noise: The p i4teeNo person shall fail to comply with allowable noise levels prescribed
under chapter 5-9, "Noise," B.R.C. 1981.
(g_1) Trash and Construction Materials: "The,-eNo person shall fail to maintain the work
site such that:
(1) Trash and construction materials are contained and do not blow off the construction
site;
(2) Trash is removed from a construction site often enough so that it does not become a
health, fire, or safety hazard; and
(3) Trash dumpsters, materials, storage trailers, or construction trailers shall not be placed
in the right of way unless approved with the right of way permit.
(hg) Dust and Erosion: The 'aeeNo Verson shall fail to use appropriate measures, such as
watering and best management environmental practices, to control dust and erosion at the
construction site.
0h) Deposit of Dirt and Material on Roadways: The pa eeNo person shall fail to comply
with the requirements to eliminate the tracking of mud or debris upon any street or sidewalk
as prescribed under section 8-2-10, "Deposit Of Dirt And Material On Streets And Alleys
Prohibited," B.R.C. 1981. Equipment and trucks used during construction, excavation or
work activity shall be cleaned of mud and debris prior to leaving any work site.
0J) Use of Street and Sidewalk Within the Right of Way or Public Easement: A permittee for a
right of way construction permit shall:
(1) Make provisions for employee and construction vehicle parking so that neighborhood
parking adjacent to a work site is not impacted;
(2) Obtain permission from the city manager to occupy public metered parking spaces
and pay applicable parking reimbursement fees for any work activity that impacts
public metered parking spaces, as set forth in section 4-18-8, "Parking Meter Hood
And Sign Permits," B.R.C. 1981;
(3) Maintain safe traffic operations along all public streets in conformance with section
8-5-10, "Traffic Control," B.R.C. 1981;
(4) Maintain an adequate and safe unobstructed public walkway through or around the
working construction site or blocked sidewalk in conformance with section 8-2-11,
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"Duty To Maintain Walkway Around Obstructed Portions Of Sidewalks," B.R.C.
1981;
(5) Clear all snow and ice hazards from public sidewalks or walkways through or around
the work site by 12:00 noon following a snowfall in conformance with section 8-2-13,
"Duty To Keep Sidewalks Clear Of Snow," B.R.C. 1981; and
(6) Secure all dangerous areas, such as trenches and excavations, with appropriate
markers, barricades, and/or fencing.
(lsj) Protection of Trees and Landscaping: The pe aitteeN22erson shall fail to protect trees,
landscape, and landscape features as required by the city. All protective measures shall be
provided at the expense of the permitteeperson performing work. Any damage to existing
trees and landscaping shall be reported to the city manager for inspection. The eu rson
erfonnin wor shall be required to complete any remedial action necessary to
repair and restore damaged trees and landscaping, as determined by the city manager. Any
trees and landscape materials which are damaged beyond repair or restoration shall be
replaced at an equivalent value to the damaged material at the expense of the
performing work.
fien*ittee
(kl) Protection of Paved Surfaces From Damage: The permittee or any other person performing
&york shall be responsible for any damage caused to any pavement by any work activity.
Upon order of the city manager, tsaid person shall repair all damage to the
satisfaction of the city manager. Failure to repair such damage will result in the use of the
permittee's performance bond, financial guarantee, or warranty by the city to repair any
damage. To protect against pavement damage, backhoe equipment outriggers shall be fitted
with rubber pads when used on pavement surfaces, and tracked vehicles are not permitted on
paved surface unless specific precautions approved by the city manager are taken to protect
the surface.
(ml) Protection of Property: The p ii#e@No person shall fail to protect from injury any
adjoining property by providing adequate support and taking other necessary measures. The
pritteeSaid person shall, at their expense, shore up and protect all buildings, walls, fences
or other property likely to be damaged during the work, and shall be responsible for all
damage to public or private property resulting from failure to properly protect and carry out
work in the public right of way and public easements.
(nM) leanu : As the work progresses, all public rights of way, public easements, and private
property shall be thoroughly cleaned of all rubbish, excess dirt, rock, and other debris. All
cleanup operations shall be done at the expense of the permittee or any other person
performing work.
(en) Preservation of Monuments: The pe vNo person shall not-disturb any surface
monuments or survey hubs and points found on the line of work unless approval is obtained
from the city manager. Any monuments, hubs, and points disturbed shall be replaced by a
K:\TRPE\o-watcash --title 8 amendments-420-420.doc
9
Colorado Registered Land Surveyor at the expense of the permitteel or the person that is
UWonsible for its removal-ex e .
Section 10. Section 8-5-12, B.R.C. 1981, is amended to read:
Section 8-5-12 Standards for Repairs and Restoration of Pavement or Sidewalks.
(a) ~~t@~-Resyonsibility: The permittee or anv other person performing work shall be fully
responsible for the cost and actual performance of all work in the public right of way or
public casement. The p teeSaid person shall do all work in conformance with city
design and construction standards. All restoration work shall result in a pavement and
sidewalk condition equal to or better than that which existed prior to construction. All streets
and paved surfaces shall be restored within two weeks of their excavation. Where bike lanes
and multi-use paths are reopened to the public prior to final restoration, a temporary, all-
weather, hard surface patch shall be provided. No person shall fail to repair or restore any
public improvement damaged, removed, or destroyed during the performance of any work
under a permit issued pursuant to this chapter.
(b) Flowable Fill Required: Flowable fill backfill material, or an equivalent backfill material
approved by the city manager that provides an incompressible, settlement-free, stable
surface satisfying the design and construction standards adopted by the city, shall be used to
restore all trenches that have been excavated in the paved or traveled portion of any public
street or alley.
(c) Rock Backfill Material Permitted: The city manager may permit an applicant to use rock
backfill material in lieu of flowable fill backfill material on streets that are designated
"local" in the Transportation Master Plan, provided all of the following conditions are
satisfied:
(1) Prior to issuance of a permit for work activity in the public right of way or public
easement, the applicant must request and receive city manager approval for the use of
the rock backfill material;
(2) The work activity requires trench excavation in excess of five feet in depth;
(3) The trench excavation is along a parallel alignment beneath the paved roadway or travel
lane, and does not include any perpendicular or diagonal trench excavation across the
paved roadway or travel lane;
(4) The type, gradation, placement, compaction, and testing of the rock backfill material
shall meet or exceed all requirements specified in the design and construction
standards adopted by the city; and
KATRPE\o-wa[cmh --title 8 amendments-420420.doc
10 /
1S
(5) The applicant shall warrant the restoration of the public street for a period of three years
as set forth in section 8-5-6, "Public Improvement Warranty," B.R.C. 1981.
(d) Subsurface or Pavement Failures: In the event that subsurface material or pavement over or
immediately adjacent to any excavation should become depressed, broken, or fail in any way
at any time after the excavation has been completed, the city manager will notify the
permittee or any other person performing work of the condition, location, and required
remedy for the street failure, and the permittee or any other person performing work shall
repair or restore, or cause to be repaired or restored, the street failure to the satisfaction of
the city manager within three days of such notice. The city manager may extend the time for
the permittee or any other person performing work to repair or restore the affected public
street.
(e) Repair by the Citv: In the event that any person or permittee fails, neglects, or refuses to
repair or restore any condition pursuant to the city manager's notice as set forth in
subsection (d) of this section the city manager may repair or restore, or cause to be repaired
or restored, such condition in such manner as the city manager deems expedient and
appropriate pursuant to the following:
(1) Any such work performed by the city shall be billed to the permittee or anv other
person performing work to recover the cost thereof plus up to fifteen percent of such
cost for administration. The permittee or any other person performing work shall pay
all such charges within thirty days of the statement date. If the permittee or an,, other
person performing work fails to pay such charges within the prescribed time period,
the city may, in addition to taking other collection remedies, seek reimbursement
through the warranty guarantee;
(2) The permittee or any other person performing work shall be barred from performing
any work in the public right of way or public easement, and under no circumstance
will the city issue any further permits of any kind to said permittee_or anv other
person performing work, until such time that all outstanding charges have been paid
in full; and
(3) Repair or restoration by the city in accordance with this subsection shall not relieve
the permittee or any other person performing work from liability for future failures at
the site of the repair or restoration.
Section 11. Section 11-1-22, B.R.C. 1981, is amended to read:
11-1-22 Excavation and Backfilling Water Service Lines.
(a) No person except an employee of the city or a person licensed as a contractor in the public
right-of-way under chapter 4-6, "Contractor In The Public Right-Of-Way License," B.R.C.
1981, shall excavate in public streets or alleys. Such persons shall obtain a permit from the
city manager and comply with all applicable provisions of this code, and other ordinances of
KATRPE\o-watomh --title 8 amendments420-420.doc
I1
the city, a •l o Td/ ,.L A T., fR / 7 ...7 Mf a ..aw i. cn ,na
Department of Publie Wor4s, July 1940.
(b) No person shall backfill any trenches under city streets and sidewalks except in accordance
with the City of Boulder Design and Construction Standards.
Section 12. Section 11-2-15, B.R.C. 1981, is amended to read:
11-2-15 Excavation and Back£illing Sanitary Sewer Service Lines.
(a) No person except an employee of the city or a person licensed as a contractor in the public
right-of-way under chapter 4-6, "Contractor In The Public Right-Of-Way License," B.R.C.
1981, shall excavate in public streets or alleys. Such persons shall obtain a permit from the
city manager and comply with all applicable provisions of this code, other ordinances of the
city
(b) No person shall backfill any trenches under city streets and sidewalks except in accordance
with the City of Boulder Design and Construction Standards.
Section 13. This ordinance is prospective in nature and shall apply to all permits
requested after the effective date of its adoption. Permits applied for prior to the effective date of
this ordinance may proceed under the regulations in effect at the time of application.
Section 14. This ordinance is necessary to protect the public health, safety, and welfare
of the residents of the city, and covers matters of local concern.
Section 15. The city council deems it appropriate that this ordinance be published by title
only and orders that copies of this ordinance be made available in the office of the city clerk for
public inspection and acquisition.
K:\TRPE\o-watcash --title 8 amendments-020-420.doc
12
INTRODUCED, READ ON FIRST READING, AND ORDERED PUBLISHED BY
TITLE ONLY this day of 20.
Mayor
Attest:
City Clerk on behalf of the
Director of Finance and Record
READ ON SECOND READING, PASSED, ADOPTED, AND ORDERED
PUBLISHED BY TITLE ONLY this day of , 20_.
Mayor
Attest:
City Clerk on behalf of the
Director of Finance and Record
K:\TRPE\o-watcmh --title 8 amendments420-420.doc
13
Agmda _&'_1p 01- .
Attachment B
ORDINANCE NO.
AN ORDINANCE AMENDING THE CITY OF BOULDER
DESIGN AND CONSTRUCTION STANDARDS (the `D.C.S')
ADOPTED PURSUANT TO ORDINANCE NO. 5986 BY
ADDING STANDARDS RELATED TO WORK AREA
TRAFFIC AND SAFETY STANDARDS; MAKING REVISIONS
TO UPDATE THE D.C.S., AND SETTING FORTH RELATED
DETAILS.
BE IT ORDAINED BY THE CITY COUNCIL OF THE CITY OF BOULDER,
COLORADO:
Section 1. The city council adopts the amendments to the City of Boulder Design and
Construction Standards, originally adopted pursuant to Ordinance No. 5986 (and amended by
Ordinance Nos. 7088 and 7400) that are shown in Exhibit A of this ordinance.
Section 2. This ordinance is prospective in nature and shall apply to all permits requested
after the effective date of its adoption. Permits applied for prior to the effective date of this
ordinance may proceed under the regulations in effect at the time of application.
Section 3. This ordinance is necessary to protect the public health, safety, and welfare of
the residents of the city, and covers matters of local concern.
Section 4. The city council deems it appropriate that this ordinance be published by title
only and orders that copies of this ordinance be made available in the office of the city clerk for
public inspection and acquisition.
KATRPE\o-watoa b-DCS changes-420-420.DOC
~e/
Agenft
INTRODUCED, READ ON FIRST READING, AND ORDERED PUBLISHED BY
"TITLE ONLY this day of 20_.
Mayor
Attest:
City Clerk on behalf of the
Director of Finance and Record
READ ON SECOND READING, PASSED, ADOPTED, AND ORDERED
PUBLISHED BY TITLE ONLY this day of 20_.
Mayor
Attest:
City Clerk on behalf of the
Director of Finance and Record
KATRPE\o-watcnh-DCS changes-420420.DOC
ATTACHMENT C
CITY OF BOULDER
DESIGN AND CONSTRUCTION STANDARDS
CHAPTER 1
GENERAL REQUIREMENTS
TABLE OF CONTENTS
1.01 GENERAL .....................................................................................................................................................1
(A) INTENT .............................................................................................................................................................1
(B) SCOPE ..............................................................................................................................................................1
(C) MINIMUM STANDARDS .....................................................................................................................................1
(D) TERMINOLOGY .................................................................................................................................................1
1.02 DESCRIPTION AND USE OF THESE STANDARDS .............................................................................2
(A) USING THESE STANDARDS ................................................................................................................................2
(B) RESTRICTIONS ..................................................................................................................................................2
(C) PUBLIC IMPROVEMENTS DESIGN ......................................................................................................................2
(D) CONSTRUCTION APPROVALS ............................................................................................................................2
(E) PUBLIC IMPROVEMENTS CONSTRUCTION .........................................................................................................3
(F) STANDARDS .....................................................................................................................................................3
1.03 SUBMITTAL REQUIREMENTS FOR CONSTRUCTION APPROVAL ..............................................4
(A) DOCUMENTATION ...................................................................................................................::.......................4
(B) ENGINEERING REPORTS ....................................................................................................................................5
(C) RIGHTS-OF-WAY AND EASEMENT DEDICATIONS, PERMITS, AND AGREEMENTS ...............................................5
(D) CONSTRUCTION PLANS .....................................................................................................................................6
(E) PLAN AND PROFILE DRAwINGS ................................................................................................................1 O4_814
(F) SUBMITTAL AND APPROVAL OF CONSTRUCTION PLANS AND DRAWINGS 1313!g
(G) As-BUH.TDRAwwGs 13
(H) SUBMITTAL AND APPROVAL OF AS-BUILT DRAWINGS ............................................................................144 -14
1.04 ALTERNATIVE MATERIALS AND METHODS OF CONSTRUCTION ......................................LJU
(A) USE ............................................................................................................................................................1514
(B) APPROVAL 15.1-544
(C) PROOF OF CLAIMS ..................................................................................................................................154-54-4
1.05 ALTERATIONS, MODIFICATIONS, AND WAIVERS ........................................................................15
(A) PRACTTCALDIFFICULTIES 15
(B) CRITERIA 15
(C) APPLICATION REQUIREMENTS ....................................................................................................................1643
(D) DECISION ...............................................................................................................................................161615
I-i DESIGN AND CONSTRUCTION STANDARDS Effective: November 16, 2000
Agwda _ A521-
1.01 General
(A) Intent
The Design and Construction Standards ("Standards") are intended to protect the public health,
safety, and welfare in the provision and maintenance of public improvements within the City of
Boulder "City"). These Standards apply to the comprehensive design and construction of adequate
and functional public improvements associated with developing, redeveloping and subdividing
lands and providing necessary right-of-way, transportation, and utility services.
(B) Scope
The City will review, approve, and monitor the design and construction of all public improvements
within the public right-of-way or public easements to ensure compliance with these Standards.
The City has the sole authority for approving, accepting, or denying the design and construction of
any public improvement.
(C) Minimum Standards
(1) These Standards prescribe minimum requirements that shall be met or exceeded when
designing and constructing all public improvements. Whenever the requirements of these
Standards are found to be inconsistent with any other adopted standards, regulations, or
codes, the more restrictive standards, regulations, or codes shall control. Reference to any
code, regulation, standard, criterion, or manual of any technical society, organization, or
association, or to any law or regulation of any governmental authority, whether such
reference be specific or by implication, shall mean the most recently adopted or current
law, code, regulation, standard, criterion, or manual in effect at the time of City approval
of any project.
(2) The design of all public improvements shall be prepared by or under the direct supervision
of a professional Engineer duly registered and licensed in the State of Colorado. The
construction of all public improvements shall be performed in a professional and
workmanlike manner by a contractor licensed by-the City as set forth in Chapter 8-
5,"Work in the Public Right-of-Way and Public Easements," Boulder Revised Code, 1981
(B.R.C.). The City assumes no responsibility for supervising or. directing construction
activities performed by a licensed contractor.
(3) All materials and equipment used for public improvements shall be of new and good
quality. Recycled materials and equipment may be used if they meet the quality standards
and conditions equivalent to new materials and equipment. All materials and equipment
shall be applied, installed, connected, erected, used, cleaned, and conditioned in
accordance with the instructions of the applicable supplier or manufacturer, except as
otherwise prescribed.
(D) Terminology
Terms, words, and abbreviations used in these Standards are defined in the Glossary (Appendix
B).
Effective: November 16, 2000 DESIGN AND CONSTRUCTION STANDARDS 1-1
Agowle bmi 11
1.02 Description and Use of These Standards
(A) Using these Standards
(1) These Standards are to be used when designing and constructing all public improvements
and infrastructure within the City. For the purposes of this document, public
improvements and infrastructure include without limitation: streets, sidewalks, trails, curb
and gutter, curb cuts, streetscaping, water mains, fire hydrants, water services and meters,
wastewater mains and services, manholes, storm water mains, inlets, drainage swales and
channels, and other improvements intended for public purposes or for the benefit of the
community located within dedicated public rights-of-way and public easements.
(2) These Standards also provide design and construction requirements to be used when
developing private lands that create an impact on public rights-of-way and public
easements. The required private improvements associated with property development
include without limitation: traffic mitigation, site access and driveway design, storm water
site drainage and detention ponding improvements, and water quality and erosion control
measures.
(B) Restrictions
The descriptions in this Chapter provide the reader with a general guide to using these Standards.
Nothing in this Chapter is intended to be a substitute for the requirements, criteria, and procedures
contained in these Standards.
(C) Public Improvements Design
(1) These Standards prescribe minimum requirements and specifications for designing
adequate and functional public improvements. However, the design of public
improvements also depends on the land use zoning and comprehensive planning
requirements for the City, as well as the specific site geography of the land to be improved
or developed.
(2) The City review for approval of submitted design plans for public improvements occurs as
part of the development review process that distributes design applications to staff in
multiple departments, divisions, and agencies. The Department of Public Works
development review staff has the primary responsibility for the review and approval of
construction plans for public improvements. An applicant for construction approval
would be well advised to consult with the Department of Public Work's development
review staff prior to submitting designs for public improvements.
(D) Construction Approvals
(1) An applicant seeking approval to construct public improvements in the City will need to
develop engineering designs and construction plans that comply with the design and
construction standards provided in this manual. In addition to complying with these
Standards, an applicant will need to file the necessary applications and meet the
requirements of the City's land use regulations, permit standards, and fee assessments as
prescribed in the Boulder Revised Code (B.R.C.), 1981.
(2) An applicant seeking construction approval will need to consult local master plans and the
location of existing public infrastructure to develop specific project designs.
1-2 DESIGN AND CONSTRUCTION STANDARDS Effective: November 16, 2000
Agoixis Romig
(3) In order to develop project designs that comply with these Standards, an applicant for
construction approval will need to enlist the services of a professional civil Engineer and
professional land surveyor to meet the requirements for certifying acceptable designs for
public improvements. An applicant may consult local directories for listings of
professional engineering and surveying service providers.
(E) Public Improvements Construction
(1) Right-of-Way Permit: The construction of public improvements in the City public rights-
of-way and public easements requires a right-of-way permit, as set forth in Chapter 8-5,
"Work in the Public Right-of-Way and Public Easements," B.R.C., 1981. An applicant
for construction approval will need to enlist the services of a contractor licensed with the
City in order to obtain a permit to construct public improvements.
(2) Variances
(a) When practical difficulties are involved in meeting the provisions of these
Standards, the Director of Public Works ("Director") may alter, modify, or waive
the strict application of these Standards to allow for the reasonable use of land or
accommodate special circumstances peculiar to such land as set forth in Section
1.04, "Alternate Materials and Methods of Construction," and Section 1.05,
"Alterations, Modifications, and Waivers," of these Standards.
(b) Alterations, modifications, or waivers are intended only for the special purposes
described, and are not to be routinely considered or approved. Where it is
necessary to vary from these Standards, an applicant for construction approval
must clearly demonstrate that the provisions of these Standards cannot be met and
the alteration, modification, or waiver will create the minimum variance necessary
to accomplish the intended purpose.
(F) Standards
(1) Transportation: The transportation standards prescribed in Chapter 2, "Transportation
Design," and Chapter 8, "Transportation Standards," provide for the study, design, and
construction of site accesses, streets, sidewalks, bicycle facilities, and trails. A traffic
impact study may be required as part of construction approvals to demonstrate adequate
design and mitigation for traffic impacts associated with new streets and driveways.
(2) Streetscapes: The streetscape standards prescribed in Chapter 3, "Streetscape Design and
Tree Protection," and Chapter 10, "Streetscaping Standards," provide for the selection,
design, placement, and protection of trees and landscaping along public streets throughout
the community. The City places high value on and strongly encourages the use of
streetscapes as a means to calm automobile traffic, address environmental concerns for
clean air and water quality, and enhance neighborhood qualities. General criteria are also
included related to subsurface work impacting transportation infrastructure.
(3) Water and Wastewater Utilities: The utility standards prescribed in Chapter 4, "General
Utilities Design," Chapter 5, "Water Design," Chapter 6, "Wastewater Design," and
Chapter 9, "Utilities Standards," provide for the study, design, and construction of water
and wastewater service facilities. These Standards detail required forecasting for sizing
water distribution and wastewater collection mains, specific construction requirements for
ensuring public health standards, and requirements for installing domestic water and sewer
service lines.
Effective: November 16, 2000 DESIGN AND CONSTRUCTION STANDARDS 1-3
Agalft
(4) Storm Water: The storm water standards prescribed in Chapter 7, "Storm Water Design,"
and Chapter 9, "Utilities Standards," provide for the study, design, and construction of
storm water drainage and flood control improvements. Detention ponding, storm sewer
and drainageway systems, water quality, and erosion control measures may be required as
part of construction approval to mitigate the impacts of increased runoff resulting from
land development.
(5) Technical Drawings: The standards for construction detail drawings prescribed in
Chapter 11, "Technical Drawings," provide design requirements for specific construction
features associated with the general construction of public improvements and
infrastructure. These drawings are intended to supplement the design and approval of
construction plans and ensure consistency in project construction to promote long-term
dependability and maintenance of public improvements and infrastructure.
1.03 Submittal Requirements for Construction Approval
(A) Documentation
(1) An applicant for construction approval shall submit required engineering reports, rights-
of-way and easement dedications, ancillary permits and agreements, and construction
plans in compliance with these Standards. Construction approvals are subject to the
Director's review, approval, and acceptance.
(2) Prior to approving construction plans, the Director may require an applicant to submit the
following documentation:
(a) Engineering reports
(b) Rights-of-way and easement dedications
(c) Permits and agreements
(d) Financial guarantees
(3) Prior to issuing a right-of-way permit or building permit, the Director may require an
applicant to submit the following documentation:
(a) Documents listed in Section 1.03, Paragraph (A)(1), above
(b) Construction plans
(c) City land use approvals
(d) Financial guarantees
(e) Documents required by Section 8-5-4, "Permit Application," B.R.C., 1981.
(4) Prior to the final acceptance of public improvements, the Director may require an
applicant to submit the following documentation:
(a) Documents listed in Section 1.03, Paragraphs (A)(1) and (A)(2), above
(b) As-built drawings
(c) Testing results
(d) Inspection approvals
(e) Financial guarantees and warranties
1-0 DESIGN AND CONSTRUCTION STANDARDS Effective: November 16 000
Y~ ftp .
(B) Engineering Reports
(1) Engineering reports required for construction approval shall be prepared as follows:
(a) In compliance with these Standards.
(b) Under the direct supervision of the Engineer certified as an expert in areas
covered in the report, and it shall be signed, sealed, and dated by the Engineer.
(c) Containing adequate information to evaluate submitted findings and designs,
including calculations, details, and references.
(2) Engineering reports required for construction approval may include the following:
(a) Geotechnical Soils Report, which provides geotechnical conditions and design
requirements based on soils investigation and testing and geologic site conditions
in compliance with standard engineering practices for soil mechanics and
groundwater analysis.
(b) Pavement Design Report, which provides geotechnical soils conditions and
adequate pavement design requirements and structural cross-sections for roadway,
sidewalks, trails, and parking lot construction. Pavement design shall be in
accordance with CDOT standards.
(c) Storm Water Report, which addresses storm water conditions, impacts, and design
requirements in compliance with Section 7.04, "Final Storm Water Report and
Plan."
(d) Utility Report, which addresses water and wastewater utilities service impacts,
demands, and design requirements in compliance with Sections 5.02, "Utility
Report," and 6.02, "Utility Report."
(e) Traffic Study, which identifies traffic impacts from proposed developments or
roadway modifications and proposes transportation design requirements and
mitigation measures in compliance with Section 2.02, "Traffic Study."
(3) The Engineer shall be responsible for correcting any error or omission in the engineering
report. City approval of the report in no way relieves the Engineer of any responsibility for
errors or omissions in the report.
(4) An applicant for construction approval shall submit at least three copies of any required
engineering report to the Director for review and approval. If acceptable, a City approval
stamp signed and dated by the Director will be placed on each copy of the report. The
City will retain one copy as a record set, one copy as a field copy for construction
inspection, and one copy will be returned to the Engineer.
(5) Engineering report approval expires 1 year following the date of approval, unless
construction of improvements under the report has been initiated.
(C) Rights-of-Way and Easement Dedications, Permits, and Agreements
(1) Rights-of-way and easements required for construction approval shall be described by a
licensed professional land surveyor registered in the State of Colorado and dedicated as
follows:
(a) In compliance with these Standards; and
(b) By subdivision platting or by a separate legal instrument that describes a specific
Effective: November 16, 2000 DESIGN AND CONSTRUCTION STANDARDS !1-555
A@Mds ~ v"' _
legal description of the dedication.
(2) Agreements required for construction approval shall be executed and may include without
limitation:
(a) Development agreement
(b) Public improvements agreement
(c) Public improvements extensions agreement
(d) Subdivision agreement
(e) Utility oversizing reimbursement agreement
(3) Permits required for construction approval shall be of approved and issued status and may
include without limitation:
(a) City of Boulder floodplain development permit
(b) City of Boulder right-of-way construction permit
(c) City of Boulder revocable right-of-way permit
(d) City of Boulder wetland permit
(e) Colorado Department of Transportation access permit
(f) Colorado Department of Transportation utility permit
(g) Railroad right-of-way encroachment permit
(h) State of Colorado Health Department 401 permit
(i) State of Colorado storm water discharge permit
0) United States Corps of Engineers 404 permit
(D) Construction Plans
(1) Preparation Standards: Construction plans required for construction approval shall be
prepared as follows:
(a) In compliance with these Standards;
(b) Under the direct supervision of the Engineer certified as an expert in areas
covered in the report, and it shall be signed, sealed, and dated by the Engineer;
and
(c) With adequate information and detail to evaluate submitted designs and ensure
accurate and functional construction of public improvements.
(2) Drafting Standards: All construction plans shall meet the following minimum drafting
standards to ensure legibility and consistency; to facilitate review, construction, and public
inspection; and to provide a clear public record.
(a) Drawings shall be submitted in both hard copy and electronic, computer-aided
design and drafting (CADD) formats to allow information to be transferred to the
City's geographic information system and facilitate clear microfilming or digital
scanning.
(b) Electronic drawing format, or electronic CADD files, shall be in ".DXF" or
1-6 DESIGN AND CONSTRUCTION STANDARDS Effective: November 16, 2000
"AutoCad.DWG" format on CD-ROM or 31/2-inch disks. Construction plan
drawings are to be layered in electronic CADD format by improvement type in a
manner acceptable to the Director of Public Works. Separate layers shall be
provided for individual improvement categories including without limitation base
mapping, transportation, landscaping, water, wastewater, and storm water.
(c) Hard-copy drawing format shall measure 22 inches by 34 inches on 3-mil
reproducible sepia or black-line mylar, and be clean, clear, and free from
objectionable background.
(d) Symbols and line types shall comply with Technical Drawing 1.01 in Chapter 11,
"Drafting Standards," and shall graphically distinguish between existing and
proposed items.
(e) All drawings are to be numbered in consecutive order.
(f) Abbreviations reflected on the construction plans are to correspond to those
presented in the Glossary.
(g) No hand-drawn or adhesively attached information, such as Kroy lettering,
adhesive backed reproductive film, or tape, maybe placed on construction plans.
(3) Cover Sheet: Construction plans required for obtaining construction approval shall
include a cover sheet with,the following elements:
(a) Project name, with legal description of the project parcel;
(b) Vicinity map, on a scale reflecting the location of the project and all streets within
1 mile of the project;
(c) Key map, on drawing sets of three sheets or more, of a scale reflecting the entire
project, separate drawing numbers, and street names;
(d) Index of drawings presenting the title of each drawing and drawing number; and
(e) The following standard construction notes:
(i) "All work shall be performed in accordance with the "Design and
Construction Standards" of the City of Boulder, and shall be completed to
the satisfaction of the Director of Public Works. In the event that a design
element does not reflect City standards, the matter must be immediately
brought to the attention of the Engineer and the Director of Public Works.
The Engineer shall be responsible for recommending a solution or
alternative solutions to the City for review and approval."
(ii) "The approval of a Construction Plan does not relieve the Contractor of
the responsibility of constructing workable public improvements. All
revisions and/or corrections required will be solely the Contractor's
responsibility, and at their expense."
(iii) "These Plans have been checked by the City of Boulder only for
conformance with the "Design and Construction Standards," compliance
with development agreement conditions, and for general conceptual
approval of public improvements as shown. The City's review does not
verify or ensure the accuracy of existing or proposed dimensions, lines,
coordinates, or grades shown, including all existing utilities shown or not
shown."
Effective: November 16, 2000 DESIGN AND CONSTRUCTION STANDARDS 1~
(iv) "Utility locations shown reflect available record data. The Contractor
shall take precautionary measures to protect all utility lines shown and
other utility lines otherwise located. The Contractor shall contact the
"Utility Notification Center of Colorado" at 1 800 922 1987 for utility
locates 24 hours prior to beginning construction."
(v) "Before work begins, the Contractor shall obtain a permit to work in the
right-of-way from the City and must notify the City Right-of-Way
Inspection staff at least 24 hours in advance of commencing construction
activities."
(vi) "The Contractor shall obtain and maintain a complete and approved set of
Construction Plans. These drawings, and any required permits, shall be
available at the project site at all times and shall be made available to City
staff upon request. If construction plans are not readily available at the
project site, the Director of Public Works may issue a stop work order and
halt all construction activities pending compliance by the Contractor."
(vii) "The Contractor agrees to comply with the provisions of the Traffic
Control Plan and the current edition of the "Manual on Uniform Traffic
Control Devices," =`Temnorarv Traffic Control" section, for
construction signage and traffic control."
(viii) "All surplus materials, tools, and temporary structures, furnished by the
Contractor, shall be removed from the project site by the Contractor. All
debris and rubbish caused by the operations of the Contractor shall be
removed, and the area occupied during construction activities shall be
restored to its original condition, within 48 hours of project completion,
unless otherwise directed by the Director of Public Works."
(ix) "The Contractor shall provide tree and landscape protection as set forth in
Chapter 6-6, "Protection of Trees and Plants," Boulder Revised Code
(B.R.C.) 1981 and the City of Boulder Design and Construction
Standards (DCS). All landscaping shall be provided and maintained in
compliance with the approved Landscaping Plan, B.R.C. and DCS."
(x) "The Contractor is required to provide and maintain erosion and sediment
control measures in accordance with the Urban Drainage and Flood
Control District "Urban Storm Drainage Criteria Manual Volume 3", the
M-Standard Plans of the Colorado Department of Transportation, and the
approved erosion control plan. The Director of Public Works may require
the contractor to provide additional erosion control measures due to
unforeseen erosion problems or if the plans do not function as intended."
(xi) "The City of Boulder requires that sidewalks constructed have a cross
slope of less than '2%. Sidewalks shall be desi=d and constructed with
cross slopes sufficiently less than 2% to ensure that they do not exceed_
the 2° inaximum."
(4) Plan Sheets: Construction plans required for construction approval may include without
limitation the following plan sheets:
(a) Storm Water Quality and Erosion Control Plan, prepared in compliance with
1-8 DESIGN AND CONSTRUCTION STANDARDS Effective: November 16, 2000
Subsection 7.01(E), "Storm Water Quality and Erosion Control."
(b) Utility Plan, prepared in compliance with Section 4.03, "Utility Plan."
(c) Final Storm Water Plan, prepared in compliance with Section 7.04, "Final Storm
Water Report and Plan."
(d) Traffic Control Plan, when construction plans have an impact on existing
transportation facilities, such as utility or access construction within existing
public streets, sidewalks, or trails. The plan is to be prepared in compliance with
P Section 8.04. "Temporary Traffic Control Plan". of these Standards, the
current edition of the -"Manual on Uniform Traffic Control Devices," "Temporary
Traffic Control' section and as set forth in Section 8-5-10, "Temporary Traffic
Control," B.R.C., 1981. Plans shall include adequate provision for the detour of
vehicular, bicycle, and pedestrian traffic.
(e) Transportation Striping and Signa eg Plan, when construction plans include
transportation traffic control measures, such as stop signs, centerline striping, and
trail signage. The plan is to be prepared in compliance with the current edition of
the -"Manual on Uniform Traffic Control Devices and should include the
following standard construction notes:
Contact the City of Boulder Sign Shop (303-413-7122) for location of all
signs prior to installation.
~i) °n; ...FD.. 1A--0. ct,, 'm 419 gr-22 an - fZSign
layout/details prior to ordering.
(ii) All sign sheeting to be Class XI (DG3 material) with 3M 1150 overlay
film.
(iii) All signs shall be 0.100 gauge aluminum
iv) All sign posts to be 12 gauge 2 inch unistrut.
(y) All sign bases to be 12 gauge 2-1 /4 inch unistrut.
vi) Sign post lengths will vary, but 7 foot minimum clearance from bottom of
sign t-Q=un(L1eve1dLr?quire.
(vii) All sign mount hardware to be Gator Lock System.
(f) Construction Phasing Plan , when projects are planned to be constructed in phases.
The plan is to illustrate the entire project site and delineate and label each separate
phase,
(g) Landscaping Plan, when construction plans include streetscaping improvements
or landscaping that has an impact on public rights-of-way or public easements.
The plan is to be prepared in compliance with Subsection 3.02, "Landscaping
Plan."
(5) Survey Information: Construction plans shall refer horizontally to the Colorado State
Plane Coordinate System NAD83, and are to include at least two horizontal and two
vertical control points presenting appropriate x, y, and z coordinates. Electronic base map
and survey control monument information is available from the City and should be used as
a basis for construction plan drawings.
(a) Horizontal control monuments reflected on drawing sheets and survey lines are to
correspond to City-recognized horizontal control points. Horizontal locations for
design features are to be presented in terms of survey line stationing and offset or
x, y coordinates.
Effective: November 16, 2000 DESIGN AND CONSTRUCTION STANDARDS 1-9
(b) Vertical elevation control points reflected on drawing sheets are to be tied to City-
recognized benchmarks with reference to the City's vertical control network.
Vertical elevations for design features are to be presented as a z coordinate.
(E) Plan and Profile Drawings
(1) Required Elements: Plan and profile drawings are required as part of the construction
plan to ensure accurate and functional construction by the contractor when the
construction is for public improvements. Plan and profile drawings are to be prepared on
standard engineering plan and profile grid sheets and shall contain the following elements:
(a) Drawing border at least one-half inch from all edges of the drawing;
(b) Title block located inside the border in the lower portion of the sheet that includes
the following information:
(i) Project name, location, and sheet title;
(ii) Name, address, and telecommunication numbers of the engineering
consultant preparing the drawing, and the name of the supervising
professional Engineer;
(iii) Date designed, drawn, surveyed, and checked;
(iv) Date prepared, and dates of all revisions;
(v) Drawing number and total number of drawings; and
(vi) Name of electronic file;
(c) North orientation arrow and scale;
(d) Certification space: a 2-inch by 2-inch space near the title block reserved for the
seal and signature of the Engineer;
(e) Approval space: a 3-inch by 3-inch space in the lower-right comer of each
drawing sheet reserved for the City's approval stamp;
(f) Revisions information space: space for noting all revisions, separate from the
original plan preparation date, that includes revision numbers, a brief description
of what was revised, and the date of the revision;
(g) Survey information;
(h) Property boundaries, lot lines, public rights-of-way, and public easements, which
are to be clearly labeled by type and dimension. Dedications previously recorded
are to be referenced by applicable film and reception numbers;
(i) Subdivision block, and lot numbering; and
(j) Street names.
(2) Plan Drawing: The "plan view" is to be located on the upper half of the drawing sheet
and drawn to a scale of 1 inch equals 20 feet. This view contains the following
information:
(a) Existing and proposed public improvements and structures, including without
limitation all grading, transportation, landscaping, City-operated and non-City-
operated public utilities (including telephone, gas, electric, cable television, fiber
optics), irrigation ditches, and other significant features.
1-10 DESIGN AND CONSTRUCTION STANDARDS Effective: November 16, 220000
(b) Match lines connecting information between drawings.
(c) Utility information required in Section 4.03, "Utility Plan," and the following:
(i) Pipe type, size, class and joint restraint.
(ii) Separation distance between existing and proposed water and wastewater
mains and services, with horizontal and vertical location of sewer
crossings requiring special construction.
(iii) Angles at alignment changes.
(iv) Horizontal and vertical locations and sizing of water service lines and
meters with ties to property lines.
(v) Horizontal and vertical locations, sizing, and types of valves, fittings,
control devices, and fire hydrants.
(vi) Horizontal and vertical locations and sizing of manholes, cleanouts, and
service lines for sanitary sewers.
(vii) Horizontal locations of soil borings.
(viii) Horizontal locations of structures.
(d) Storm water information required in Section 7.04, "Final Storm Water Report and
Plan," and the following:
(i) Existing and proposed contours of at least 2-foot intervals.
(ii) Existing and proposed storm drainage facilities and details, including
storm sewers, inlets, manholes, culverts, swales, detention ponds and
drainageways.
(iii) Horizontal and vertical locations and sizing of manholes and inlets for
storm drainage.
(iv) Horizontal and vertical location of existing and proposed drainage outfall
points.
(e) Survey, transportation, and surface improvements information including without
limitation:
(i) Survey lines and stations based on center line or flowline stationing, and
equated to flowline at bubbles, cul-de-sacs, horizontal curves, and other
departures from normal street cross sections.
(ii) Stations and elevations of flowlines at all existing and proposed curb
returns, such as horizontal points of curvature (PC's), points of tangency
(PT's), and points of compound curvature (PCC's); at the high or low
point on all vertical curves; at inlets (including invert); and at intervals of
no more than 50 feet along the streets.
(iii) Existing and proposed curb return radii.
(iv) Handicap access ramps.
(v) Complete horizontal curve data: radius (R), delta (D), arc length (L), and
tangent length (T).
(vi) All crown lines, where they depart from the normal cross sections
Effective: November 16, 2000 DESIGN AND CONSTRUCTION STANDARDS 1-11
(transitions to existing roadways), with appropriate transition starting
elevation.
(vii) Centerline stations at all intersecting streets.
(viii) Stations of drainage facilities, including inlets, manholes, and storm water
outfalls, and directional drainage flow arrows.
(ix) Full width of right-of-way, intersecting roadways, street cross sections,
sidewalks and trails, existing curb cuts, and other relevant features along
all roadways abutting the project.
(x) Traffic control devices, including striping, markings, signage, and signals.
(3) Profile Drawing: The "profile view" is to be located directly below the plan view along a
matching survey line and stationing and is to be drawn at a horizontal scale of 1 inch
equals 20 feet and a vertical scale of 1 inch equals 5 feet. This view shall contain the
following information:
(a) Original and proposed ground elevations.
(b) Stationing sequence, left to right.
(c) Elevations labeled on both left and right sides of the drawing sheet.
(d) Match lines.
(e) Elevations based on center line, flow line, or invert of pipe. (Top of pipe is
acceptable only for existing utilities.)
(f) Stations and elevations of existing and proposed grade breaks.
(g) Crossings of existing and proposed utilities.
(h) Elevations of manhole inverts and rims, and service line inverts.
(i) Elevations of inlets, top of curb, flowline, inverts, and connection locations.
0) Slopes or grades of wastewater and storm water sewers.
(k) Existing and proposed finished grades over utilities.
(1) Street profiles, including:
(i) Stations and elevations of existing and proposed horizontal PC, PT, PCC,
PRC.
(ii) Vertical curves with VPI, VPC, VPT, high point or low point (not middle
ordinate) stations and elevations.
(iii) Center line stations of all intersecting streets.
(iv) Grades for all profiles.
(v) Curb flowlines at 25-foot minimum intervals, and at all vertical sags or
crests.
(vi) Curb return profiles to ensure positive drainage at ramp locations.
(4) Detail Drawings: Detail drawings are required for construction details not provided in
Chapter 11, "Technical Drawings." Detail drawings illustrate construction details for
critical design features such as concrete paving sections, mechanical pipeline connections,
and detention ponding release structures. Detail drawings are to include dimensioning,
1-12 DESIGN AND CONSTRUCTION STANDARDS Effective: November 16, 2000
materials, specifications, and specific construction notes appropriate to each construction
detail.
(5) Cross-Sectional Drawings: These drawings are required with all construction plans that
include varying or transitional features, such as street sections, fill slopes, and drainage
channels. Cross-Sectional drawings reflect dimensions, elevations, stationing, and any
other detailed information necessary to ensure accurate construction.
(F) Submittal and Approval of Construction Plans and Drawings
(1) Submittal: An applicant for construction approval shall submit at least three drawing sets
of any required construction plans to the Director for review and approval, including:
(a) Original mylar, mylar sepia, black-lined or blue-lined drawing set prepared by the
Engineer to be stamped and approved by the City and returned to the Engineer
(b) 2 Sets of black-lined or blue-lined prints drawing set signed, sealed, and dated on
each drawing sheet by the Engineer to be maintained on file with the City as the
record set of the construction plan approval documents and for use by the City
right-of-way inspector.
(2) Approval: The Director will review construction plans for compliance with these
Standards. If acceptable, a City approval stamp signed and dated by the Director will be
placed on each drawing sheet of the construction plans.
(3) Effective Period: Construction plan approval expires 1 year following the date of
approval, unless construction has been initiated. An applicant for construction approval
may resubmit the construction plan for reapproval, subject to review for compliance with
standards in effect at the time of resubmittal.
(4) Errors and Omissions: The Engineer shall be responsible for correcting any error or
omission in the construction plans or drawings. City approval of the construction plans in
no way relieves the Engineer of any responsibility for errors or omissions in the plans.
(G) As-Built Drawings
(1) Requirements: As-built drawings reflect the actual in-place construction of public
improvements.
(a) The applicant shall submit as-built drawings for final construction approval within
60 days from the date construction was completed and prior to City acceptance of
any public improvements.
(b) The applicant shall ensure that every sheet of the approved construction plans
reflects the as-built drawings conditions.
(2) Preparation: As-built drawings shall be prepared by the Engineer responsible for the
original construction plan approved by the City. Drawings shall be prepared as follows:
(a) In compliance with the requirements in Sections 1.03(D), "Construction Plans,"
and 1.03(E), "Plan and Profile Drawings."
Effective: November 16, 2000 DESIGN AND CONSTRUCTION STANDARDS 1-1-1/3
Asmda li« c..~
(b) Based on completed field inspections, accurate measurements, survey data, and
testing results, materials, and equipment records.
(c) To reflect any variations from the approved construction plans in the public
improvements actually constructed.
(3) Transfer of Responsibility: If the Engineer responsible for the original construction plan
is replaced prior to preparing as-built drawings, the replacement Engineer shall agree in
writing to accept the responsibility for the design certified by the original Engineer under
the approved construction plan prior to City acceptance of the constructed public
improvements.
(H) Submittal and Approval of As-Built Drawings
(1) Submittal: An applicant for construction approval shall submit at least two drawing sets
of any required as-built drawings to the Director of Public Works for review and approval.
As-built drawing sets shall contain the following:
(a) A complete 3-mil mylar drawing set of the as-built construction plan drawing set
reflecting the as-built conditions.
(b) A complete black-lined or blue-lined prints drawing set of the as-built drawing set
reflecting the as-built conditions and signed, sealed, and dated on each drawing
sheet by the Engineer.
(2) Approval:
(a) The Director will review the as-built drawings for compliance with these
Standards. If acceptable, a City approval stamp, signed and dated by the Director,
will be placed on each drawing sheet of the as-built drawings.
(i) The mylar drawing set will replace the construction approval drawing set
and will be maintained on file with the City's Mapping and Records
Office as the approved as-built drawings set, from which copies may be
reproduced.
(ii) The black- or blue-lined print drawing set, signed, sealed, and dated by
the Engineer, will be maintained on file with the City as the record
document of the as-built drawing set that has been approved by the City.
(b) The Director will not approve any construction, place in service, release financial
guarantees, or issue utility connections for any public improvements for which
acceptable as-built drawings have not been submitted.
(3) Variations and Discrepancies: If any substantial variations or discrepancies, particularly
with respect to location, design slopes, grades, dimensions, and clearances, are discovered
between the approved construction plans and the public improvements actually
constructed, the Engineer shall propose and recommend a solution or alternative solutions
to the City for review and approval. If no proposed alternative will satisfy the
requirements of these Standards, the contractor shall reconstruct the deficient public
improvements to comply with the approved construction plans.
(4) Errors and Omissions: The Engineer shall be responsible for the correction of any error
or omission in the as-built drawings. City acceptance of the as-built drawings in no way
relieves the Engineer of any responsibility for errors or omissions in the drawings.
1-14 DESIGN AND CONSTRUCTION STANDARDS Effective: November 16, 2000
ASmaft i
1.04 Alternative Materials and Methods of Construction
(A) Use
The provisions of these Standards are not intended to prevent the use of any materials or methods
of construction not specifically prescribed in these Standards, provided that the alternative
materials or methods of construction have been approved and their use authorized by the Director.
(B) Approval
The Director may approve an alternate material or method of construction, provided the proposed
design is satisfactory and complies with the provisions of these Standards and that the material,
method, or work offered is, for the purpose intended, at least the equivalent of that prescribed in
these Standards in suitability, strength, effectiveness, durability, safety, and sanitation.
(C) Proof of Claims
The Director will require that sufficient evidence be submitted to substantiate any claims that may
be made regarding an alternate material or method of construction. The details of any action
granting approval of an alternate material or method will be recorded and entered in the files of the
city.
1.05 Alterations, Modifications, and Waivers
(A) Practical Difficulties
When practical difficulties are involved in executing the provisions of these Standards, the
Director may alter, modify, or waive the strict application of these Standards, according to the
process described herein.
(B) Criteria
No alteration, modification, or waiver of the strict application of any provision of these Standards
shall be granted unless the applicant clearly demonstrates and the Director finds that the following
conditions exist:
(1) The strict application of the provisions of these Standards would deprive an individual of
the reasonable use of land or structure, and
(2) Special circumstances peculiar to such land or development justify the requested
alteration, modification, or waiver, and
(3) Any alteration, modification, or waiver would result in a solution consistent with the goals
of the underlying zoning district, a Boulder Valley Comprehensive Plan goal, a specific
neighborhood plan, or an adopted design guideline, and
(4) Any alteration, modification, or waiver represents the minimum variance from these
Standards that will accomplish the intended purpose, and
(5) Any alteration or modification will at least equal the suitability, strength, effectiveness,
fire resistance, durability, safety, and sanitation performance requirements prescribed in
these Standards, and
(6) Any alteration, modification, or waiver will not harm the adjacent land owners, the
Effective: Nov=ba 16, 2000 DESIGN AND CONSTRUCTION STANDARDS 1-15
F L _
neighborhood, or the welfare of the public at large, and
(7) Any alteration, modification, or waiver will not create an additional maintenance or
financial burden for the affected property owners or the City.
(C) Application Requirements
(1) An applicant for an alteration, modification, or waiver to these Standards shall submit a
written request to the Director. The request shall state in detail the specific sections and
subsections of these Standards requested to be altered, modified, or waived, and the
request shall describe in detail why the requested waiver, alteration, or modification meets
the criteria in Section 1.05(B), above.
(2) The Director may require additional documentation to support the request and shall
require that sufficient evidence be submitted to substantiate any claims that may be made
regarding alterations, modifications, or waivers to these Standards. Sufficient evidence
may include verification by a Colorado registered professional Engineer, possessing
relevant expertise in the area.
(D) Decision
(1) The Director will advise the applicant, in writing, of the decision on the requested
alteration, modification, or waiver. The DirectorOs decision is a final action that is
administrative and may be appealed through the judicial process. In granting any
alteration or modification to these Standards, the Director may impose specific conditions
necessary to ensure that the criteria described in Section 1.05(B), above, are, and will
remain, satisfied.
(2) The Director of Public Works will consult with the Planning Director when evaluating
issues that potentially impact urban design. The details of any decision granting approval
of an alteration, modification, or waiver to these Standards will be entered in the form of
written findings. A written log of all decisions granting alterations, modifications, or
waivers to these Standards will be kept current in the office of the Director of Public
Works and will be available for public inspection.
1-16 DESIGN AND CONSTRUCTION STANDARDS Effmfive: November 16, 2000
AR-311da r= r,.,
CITY OF BOULDER
DESIGN AND CONSTRUCTION STANDARDS
CHAPTER 2
TRANSPORTATION DESIGN
TABLE OF CONTENTS
Section Paee
2.01 GENERAL ......................................................................................................................................................4
(A) INTENT .............................................................................................................................................................4
(B) TRANSPORTATION MASTER PLAN ....................................................................................................................4
(C) REFERENCE STANDARDS ..................................................................................................................................4
(D) FUNCTIONAL STREET CLASSIFICATION .............................................................................................................4
2.02 TRAFFIC STUDY ..........................................................................................................................................4
(A) TRAFFIC ASSESSMENT ....................................................................................................................................4
(13) TRAFFIC STUDY REQUIREMENTS ......................................................................................................................4
(C) RESPONSIBILITIES FOR TRAFFIC STUDIES ..........................................................................................................4
(D) PREPARATION ..................................................................................................................................................4
(E) COORDINATION WITH CITY ............................................................................................................................54
(F) SUBMITTAL ......................................................................................................................................................5
2.03 TRAFFIC STUDY FORMAT .......................................................................................................................5
(A) STUDY REQUIREMENTS ....................................................................................................................................5
(B) INTRODUCTION ................................................................................................................................................5
(C) SITE LOCATION AND ZONING ...........................................................................................................................5
(D) STUDY AREA BOUNDARIES ..............................................................................................................................5
(E) EXISTING AREA STREET SYSTEM DESCRIPTION ................................................................................................5
(F) EXISTING AND PROJECTED ROADWAY AND INTERSECTION TRAFFIC VOLUMES ................................................5
(G) EXISTING AND PROPOSED SITE USES ................................................................................................................5
(II) EXISTING AND PROPOSED LAND USES IN VICINITY OF THE SITE .......................................................................6
PORTATION DEMAND MANAGEMENT STRATEGIES ...................................................................6
(I) TRAALEL-IRmNs
(J) TRIP GENERATION ............................................................................................................................................6
(K) TRIP DISTRIBUTION/ASSIGNMENT AND MODAL SPLIT ......................................................................................7
(L) EXISTING AND PROJECTED TRAFFIC VOLUMES .................................................................................................7
(M) TRANSPORTATION SERVICE STANDARDS ......................................................................................................918
(N) LEVEL OF SERVICE ANALYSIS ..........................................................................................................................9
(O) TRAFFIC COUNTS AND ANALYSES WORKSHEETS .....................................................................................104-89
(P) TRAFFIC CONTROL AND SIGNALS ..10
(Q) TRAFFIC ACCIDENTS ................................................................................................................................114-1-0
(R) NOISE ATTENUATION 11
(S) RECOMMENDATIONS 11
(T) CONCLUSION 12
(U) REVISIONS TO TRAFFIC STUDY 12
2.04 SITE ACCESS ..............................................................................................................................................12
(A) ACCESS REQUIREMENTS 12
(B) ACCESS PERMrr REQuIRED 12
(C) LOCATION OF ACCESS ..................................................................................................................................132
(D) SIGHT DISTANCE 13
(E) RESTRICTION OF TURNING MOVEMENTS 13
Effective: November 16, 2000 DESIGN AND CONSTRUCTION STANDARDS-1
~ pap
(F) TRAFFIC CONTROL 14
(G) ONE-WAY ACCESS LANES 14
(II) SPEED CHANGE LANES 14
(I) ACCESS AND CURB CUT TYPE 14
(J) ACCESS AND CURB CUT WIDTH 15
(K) ACCESS AND CURB CUT RADII 15
(L) ACCESS AND CURB CUT GRADES 15
(M) DRIVEWAYS .............................................................................................................................................16145
2.05 RIGHT-OF-WAY REQUIRE MENTS .......................................................................................................17
2.06 BASE STREET AND ALLEY STANDARDS ...........................................................................................17
(A) BASE STREET STANDARD 17
(B) BASE ALLEY STANDARD 17
2.07 STREET GEOMETRIC DESIGN ..............................................................................................................18
(A) MINIMUM REQUIREMENTS 18
(B) RIGHT-OF-WAY 18
(C) LANE WIDTH ..............................................................................................................................................294-8
(D) HORIZONTAL ALIGNMENT ........................................................................................................................29-19
(E) VERTICALAuGNMENT ...................................................................................................................................21
(F) SIGHT DISTANCE 22
(G) MEDIANS 22
(II) VERTICAL CLEARANCE OF STRUCTURES ....................................................................................................2322
2.08 SIDEWALKS ..........................................................................................................................................23232
(A) REQUIRED ................................................................................................................................................23232
(B) CONFORMANCE WITH THE TRANSPORTATION MASTERPLAN ....................................................................23232
(C) COMPLIANCE WITH AMERICANS WITH DISABILITIES ACT (ADA) ..............................................................~2
(D) MINIMuMWIDTHs ..23
(E) VERTICAL GRADES .......................................................................................................................................243
(F) VERTKALCL.EARANCF. ~ 23
2.09 RESIDENTIAL STREETS ..................................................................................................................243x33
(A) PURPOSE ................................................................................................................................................242233
(B) SCOPE ............................................................................................................................................................24
(C) DIRECTOR REVIEW 25
(D) RESIDENTIAL STREET SECTIONS 26
2.10 EMERGENCY ACCESS LANES .......................................................................................................31lu-0
(A) EMERGENCY ACCESS REQUIRED 319-390
(B) WHEN EMERGENCY ACCESS LANE IS REQUIRED ....................................................................................323-39Q
(C) SECONDARY EMERGENCY ACCESS .........................................................................................................323-3-1-1
(D) LOCAL EMERGENCY ACCESS LANE STANDARDS ....................................................................................324341
(E) UNOBSTRUCTED ACCESS .......................................................................................................................37 1
(F) ACCESS IDENTIFICATION ..........................................................................................................................33-P-1
2.11 BICYCLE FACILITIES DESIGN ......................................................................................................333-3322
(A) CONFORMANCE WITH BICYCLE SYSTEM PLAN .......................................................................................333-22
(B) ON-STREET BIKE LANES- STREETS WITHOUT ON-STREET PARKING 33--32:2
(C) ON-STREET' BIKE LANES - STREETS WITH ON-STREET PARKING 333322
(D) OFF-STREECBiKELANES .......................................................................................................................3333322
(E) BICYCLE PARKING 332
2.12 STREET LIGHTING ...........................................................................................................................34$344_
2-2 DESIGN AND CONSTRUCTION STANDARDS Effective: November 16 2000 ~~✓r'-~~~qJ/~,
(A) SCOPE ....................................................................................................................................................3SL3' 4
(E) GUIDELINES FOR STREET LIGHTING !Law=
(C) EASEMENTS ...........................................................................................................................................3744~5
LIST OF TABLES
Number Page
Table 2-1: Access Spacing Requirements ...................................................................................................13
Table 2-2: Access Design Specifications ............................................................................................15 1-14
Table 2-3: Base Street Standard Components ..............................................................................................17
Table 2.4: Base Alley Standard Components ........................................................................................184-87
Table 2-5: Minimum Street Lane Widths 194-8
Table 2-6: Minimum Horizontal Street Curve Specifications ......................................................................19
Table 2-7: Minimum Street Spacing ........................................................................................................411
Table 2-8: Minimum Intersection Radii .......................................................................................................20
Table 2.9: Maximum Street Grades .............................................................................................................21
Table 2-10: Vertical Curve Design Control ...........................................................................................221
Table 2-11: Median Width Design Standards ..............................................................................................22
Table 2-12: Minimum Sidewalk Widths ......................................................................................................23
Table 2-13: Residential Street Design Standards ................................................................................282?; 7
Effective: November 16,200 DESIGN AND CONSTRUCTION STANDARDS 2-3
2.01 General
(A) intent
The Transportation Design Standards are intended to provide for an integrated transportation
system for all transportation modes, including pedestrian, bicycle, transit, and motor vehicle.
(B) Transportation Master Plan
All improvements proposed to the City's transportation system shall conform with the goals,
policies, and standards adopted in the Transportation Master Plan (TMP).
(C) Reference Standards
Where not specified in these Standards or the B.R.C. 1981, to protect the public health, safety, and
welfare, the Director of Public Works will specify the standards to be applied to the design and
construction of transportation improvements and may refer to one or more of the references listed
in the References Section of these Standards.
(D) Functional Street Classification
Public streets shall be designed and improved to conform to the applicable functional street
classification as defined iron the "Street Function Class and PronoSed Street
Facilities" of the TMP. --ad.. ay o.,,.,..;, aal Glassi fte ,tion n TAI-P.
2.02 Traffic Study
(A) Traffic Assessment
The Director will require an applicant to submit a Traffic Assessment in order to adequately assess
the impacts of any development proposal on the existing and planned transportation system. The
Assessment shall include a peak hour trip generation study projection (Refer to 2.03(7)) and may
require additional information as determined by the Director.
(B) Traffic Study Requirements
For any development proposal where trip generation from the development during the peak hour
of the adjacent street is expected to exceed 100 vehicles for nonresidential applications, or 20
vehicles for residential applications the Director will require an applicant to submit a Traffic Study
to evaluate the traffic impacts of any development proposal required to undergo a concept review
as set forth in Section 9-4-10, "Concept Plan Review and Comment," B.R.C. 1981. The traffic
study may include the information required in Subsections (A) through (K), of Section 2.03,
"Traffic Study Format," of these Standards at the discretion of the Director.
(C) Responsibilities for Traffic Studies
An applicant for construction approval shall be responsible for assessing all traffic impacts
associated with a proposed development, with the City serving in a review and approval capacity.
(D) Preparation
A Traffic Study shall be prepared by an Engineer with adequate experience and expertise in
transportation engineering. The Engineer shall be identified in the Traffic Study.
2-4 DESIGN AND CONSTRUCTION STANDARDS Effective: November 16, 2000 - t
(E) Coordination with City
Transportation consultants and Engineers preparing Traffic Studies shall discuss proposed
development projects with the Director prior to initiating the study. Issues to be discussed include,
without limitation, the TMP, definition of the study area, relevant subarea plans, methods for
projecting build-out volumes, background traffic conditions, trip generation, directional
distribution of traffic, and trip assignment. These aspects of the Traffic Study shall be approved
by the Director prior to study preparation.
(F) Submittal
A Traffic Study shall be prepared in conformance with, and including, the information required in
Section 2.03, "Traffic Study Format," of these Standards.
2.03 Traffic Study Format
(A) Study Requirements
The information provided in the Traffic Study shall include-the following sections as outlined
below. The study shall be typed and bound, and clearly identify the data and information in the
appropriate sections. In addition, the study shall contain a table of contents, lists of figures, and
tables, and shall identify any map pockets and included drawings.
(B) Introduction
The Traffic Study shall provide an introduction with an overview and discussion of the project or
development proposal.
(C) Site Location and Zoning
Include a vicinity map detailing the property location, a conceptual site plan reflecting the
boundaries of the project or development, and information detailing the designated zoning district,
general terrain and physical features of the site and the surrounding area.
(D) Study Area Boundaries
Include the Study Area Boundaries as determined based on discussions with the Director and
include all roadways and transportation routes providing access to the site and the surrounding
transportation system.
(E) Existing Area Street System Description
Describe and include roadway orientations, functional classifications and geometries, intersection
geometries, and traffic controls, including without limitation signage and striping, speed limits,
parking restrictions, sight distance, transit routes, the presence of bicycle and pedestrian facilities,
and any other related traffic operations information and improvements approved or planned by
government agencies. For identified improvements scheduled by government agencies, include
the nature of the improvements, extent, implementation schedule, and the agency or funding
source responsible.
(F) Existing and Projected Roadway and Intersection Traffic Volumes
Include diagrams that map existing traffic volumes, and each variation of projected traffic
volumes, for all roadways and intersections within the study area. Also provide diagrams that map
the intersection and roadway geometries and traffic control within the study area.
(G) Existing and Proposed Site Uses
Include an identification of the existing land use and proposed land use or the highest potential
Effective: November 16, 2000 DESIGN AND CONSTRUCTION STANDARDS 2-5
tdc~_
land use based on zoning and maximum trip generation where a specific use has not been
determined. If rezoning is proposed, the study shall provide a comparison between the highest trip
generation uses for the existing zoning and the highest trip generation uses for the proposed
zoning.
(1T) Existing and Proposed Land Uses in Vicinity of the Site
Document any vacant land or potential redevelopment that may result in a change in traffic volume
conditions within the study area during each time period studied. Perform and provide trip
generation on these parcels and include the trips generated from these parcels in the trip volume
diagrams and level of service analyses for each appropriate time period studied.
(1) Tra*eingnnrtation Demand Management Strategies
Include an outline of travelnsnortation demand management strategies to mitigate traffic impacts
created by proposed development and implementable measures for promoting alternate modes 4£
travel, including but not limited to the following:
(1) Site Design: Incorporate design features that facilitate walking, biking, and use of transit
services to access a proposed development, including features such as transit shelters and
benches, site amenities, site design layouts, orientations and connections to increase
convenience for alternate modes and reduce multiple trips to and from the site, and direct
connections to existing offsite pedestrian, bicycle, and transit systems.
(2) Programs and Education: Incorporate alternate modes programs, such as providing
transit passes to employees and residents, van pooling to the site by a major employer,
ride-sharing, parking pricing, and planned delivery services, and educational measures
such, as promoting telecommuting, distributing transit schedules and trails maps, signing
alternate travel routes, and providing an onsite transportation coordinator or plan to.
educate and assist residents, employees, and customers in using alternate modes.
(J) Trip Generation
Traffic estimates for the proposed project and potential developed or redeveloped properties in the
study area shall be obtained by performing trip generation using the procedures outlined in the
most current edition of the Trip Generation Manual of the Institute of Transportation Engineers
(ITE). If adequate Trip Generation Manual data is not available for a specific land use, the
procedures used to estimate trip generation data shall be approved by the Director. Include the
following specific trip generation information:
(1) Summary Table: List each land use that requires trip generation analysis, including the
project plus developed or redeveloped land uses within the study area. For each trip
generation summary include land use type, amount, intensity, average trip generation rates
for total daily traffic and peak hour traffic (a.m., noon and/or p.m. peak hour traffic
generation may be required), and the resultant total trips generated for each time period
and each land use.
(2) Calculations: Calculation of projected trip generation for any land use, used to determine
study area impacts, shall be based on the following:
(a) Trip generation formulas (or rates, if formulas are not available) published in the
most recent version of the Trip Generation Manual. Trip generation reports from
other industry publications may be considered but are subject to the approval of
the Director.
(b) A local trip generation study, following procedures outlined in the most recent
2-6 DESIGN AND CONSTRUCTION STANDARDS Effective: November 16, 2000
version of the Trip Generation Manual, if no published rates are available and
similar land uses can be studied.
(c) Additional data or studies from other similar jurisdictions. Trip generation
obtained in this fashion is subject to the review and approval of the Director.
(3) Trip Generation Reductions: Credit for any trip reductions is subject to review and
approval in advance by the Director. Anticipated trip reduction assumptions should be
discussed and approved by the Director prior to the preparation of the Traffic Study. Trip
reductions typically fall into one of two categories: those that reassign some portion of the
trip generation from the surrounding roadway network (passerby and diverted trip
reductions), and those that remove trips generated from the land use trip generation
(internal and modal split reductions).
(a) Use of passerby and diverted trip reductions may be evaluated and considered in
reducing the additional estimated total trip generation of a new land use.
However, passerby and diverted trip reduction factors are not to be applied
directly to reduce trip generation and turning movement volumes at driveways
serving the studied land use. These factors are subject to the approval of the
Director.
(b) Internal trip reductions and modal split assumptions may reduce the total trip
generation of a land use. These factors considered in the Traffic Study shall
supply analytical support and detailed documentation to demonstrate how the
estimates were derived and incorporated, and are subject to the approval of the
Director.
(f) Trip Distribution/Assignment and Modal Split
Trip distribution/assignment of any generated traffic estimates shall be clearly summarized and
illustrated for each access route entering and exiting the generating land use, using the study area
transportation system as a basis. Include the following specific trip distribution/assignment
information:
(1) Trip Distribution: The trip distribution for each site shall be identified and illustrated
with a graphical figure detailing the percentages making each movement, at each
intersection in the study area. The trip distribution shall be logically based upon factors
such as the site's location within the City's existing traffic volume data in the study area,
market analyses, applied census data, and/or professional engineering judgement. Trip
distribution assumptions are subject to the approval of the Director.
(2) Trip Assignment: Trip assignment shall be done by applying the trip generation totals for
each time period studied, to the trip distribution percentages developed. The trip
assignment shall develop anticipated traffic volumes for each of the movements identified
by the trip distribution and each of the time periods identified in the analyses. The
resulting traffic volumes shall be illustrated with graphical figures detailing the anticipated
volumes making each movement, at each intersection in the study area, during each time
period studied.
(L) Existing and Projected Traffic Volumes
(1) Traffic Volume Scenarios: Five traffic volume scenarios and three separate times of the
day may be required to be included in a Traffic Study analysis. The applicant shall meet
with the Director to determine the scenarios and time periods to be studied, prior to the
development of the Traffic Study. The number of scenarios and time periods to be studied
Effective: November 16, 2000 DESIGN AND CONSTRUCTION STANDARDS 2-7
Agods -5
are subject to the approval of the Director. The potential scenarios and time periods
include the following:
(a) Scenario 1 - Existing Conditions: An analysis of existing traffic conditions will be
required in the Traffic Study. Existing Conditions analysis should attempt to
model traffic conditions at the time the traffic study is being prepared. Traffic
counts that are older than the year the study is being prepared shall be factored up
or adjusted to existing year volumes.
(b) Scenario 2 - Anticipated Proiect Completion Year Without Proiect Volumes:
Include an analysis of the anticipated traffic conditions during the year the project
is intended to be finished and traffic is generated. The analysis shall anticipate the
increase in background traffic volumes and the generation of other related projects
that are not present in the existing condition, but would likely be completed and
generating trips in this time period. The trip generation for the proposed project
shall not be included in this scenario. If the project is intended to be completed
the same year that the Traffic Study is being prepared, then this scenario is the
same as Scenario 1 - Existing Conditions.
(c) Scenario 3 - Anticipated Project Completion Year With Project Volumes: This
scenario is the same as Scenario 2, except that the project volumes are assigned to
the roadway network and included in the analyses.
(d) Scenario 4 - Future Buildout Conditions Without Proiect Volumes: An analysis of
the anticipated traffic conditions during buildout, using the projected buildout
year defined in the City's TNV. The analysis shall anticipate the increase in
background traffic volumes and the generation of other related projects that are
not present in the existing condition, but would likely be completed and
generating trips in this time period. The trip generation for the proposed project
should not be included in this scenario.
(e) Scenario 5 - Future Buildout Conditions With Project Volumes: This scenario is
the same as Scenario 4, except that the project volumes are assigned to the
roadway network and included in the analyses.
(2) Traffic Volume Projections: The traffic volume projections shall identify existing and
projected daily traffic counts and peak hour turning movement counts for each access
point, intersection and street identified in the traffic study area for each of the
aforementioned scenarios required in the study.
(3) Time Periods: Each scenario may be required to look at three different time periods (the
a.m., noon and p.m. peak hour conditions). The Director will determine which time
periods and scenarios are required for each Traffic Study depending upon the project's
size, location, types of land uses and other pertinent factors.
(4) Raw Traffic Count Data: Include all raw traffic-count data for average daily and peak
hour conditions and traffic analysis worksheets in the appendices of the Traffic Study for
reference. Computer techniques and associated printouts may be used for this part of the
report.
NOTE: All total daily traffic counts must be actual machine counts, not based on factored
peak hour sampling. Latest available machine counts from the City, and other agencies,
may be acceptable if not more than 2 years older than the year the Traffic Study is being
prepared. Data older than the year the Traffic Study is being prepared shall be factored up
to current year numbers, using growth rates approved by the Director.
2-8 DESIGN AND CONSTRUCTION STANDARDS Effective: November 16, 2000
Asada I-5
(M) Transportation Service Standards
Include a discussion and analysis assessing the impacts of the project or development proposal on
the existing and planned transportation system in the study area with respect to the following
traffic impact and mitigation objectives:
(1) Transportation Master Plan Objectives: TNT service standards' objectives include the
following:
(a) No long-term growth in auto traffic over current levels described as a 0 percent
increase in vehicle miles traveled.
(b) Reduction in single-occupant vehicle travel to 25 percent of total trips.
(c) Continuous reduction in mobile source emission of air pollutants, and no more
than 20 percent of roadways congested at LOS F.
(2) Level of Service Design Guide: LOS standards objectives include:
(a) Minimum LOS D design guide for peak hour conditions for all movements.
Project impacts that maintain LOS D or better for all intersections and street
segments may not be required to provide LOS-related traffic mitigation
improvements.
(b) LOS E and lower peak hour conditions require the implementation of one or more
transportation management strategies consistent with the goals and objectives of
the TMP. A transportation management strategy plan required to address and
mitigate these conditions may include travel demand management, land use
intensity reduction, site design, layout and access modifications, parking reduction
measures, or transportation infrastructure improvements.
(NV) Level of Service Analysis
(1) The Traffic Study shall provide LOS analyses for all study area intersections (signalized
and unsignalized) and mid-block roadway segments using methodologies outlined in the
current Highway Capacity Manual. The analyses should be performed for Scenarios 1
through 3, described in Section 2.02(L), "Existing and Projected Traffic Volumes," and
for each time period (a.m., noon and/or p.m. peaks) that is required in the Traffic Study,
unless otherwise required by the Director.
(2) Level of service analyses shall consider the appropriate infrastructure, lane usage, traffic
control and any other pertinent factors for each scenario to be studied. Intersections with
planned improvements, discussed in City planning documents, may have those
improvements shown in the level of service analyses.
(3) Signalized intersection level of service analyses shall use the existing timing and phasing
of the intersections for all scenarios. If the analyses are to deviate from existing timings or
phasing, then a detailed signal progression analyses for the affected corridor shall also be
provided.
(4) The results of the level of service analyses for each scenario and each time period shall be
summarized into one or more tables that illustrate the differences in level of service for
each scenario. At a minimum, these tables shall list the level of service results for each
intersection to include the level of service for each approach and the total intersection
level of service, as well as the appropriate delay values for each approach and the total
intersection. These tables shall highlight any locations where the addition of project
Effective: November 16, 2000 DESIGN AND CONSTRUCTION STANDARDS 9
s3v G.~
traffic has caused any approach of any intersection to fall below the LOS D standard for
the City.
(O) Traffic Counts and Analyses Worksheets
Provide capacity analysis calculations based on the planning or operational analysis techniques
contained in the current Highway Capacity Manual or subsequent highway capacity techniques
established by the Federal Highway Administration, including the following:
(1) Raw Traffic Count Data: Include all raw traffic count data for average daily, hourly
Average daily trip (ADT), and peak hour conditions and traffic analysis worksheets in the
appendices of the traffic study for reference. Computer techniques and associated
printouts may be used for this part of the report.
(2) Level of Service Analyses: Include all level of service analyses performed for
intersections and roadway links. If signal timing or phasing changes are proposed for
traffic mitigation and the signal is currently part of a coordinated system, a progression
analysis will be required to ensure that adequate progression is maintained or provided.
All progress analysis and assumptions to be used shall be reviewed and approved by the
Director.
(P) Traffic Control and Signals
The Traffic Study shall discuss and analyze any traffic control measures that may be necessary to
serve a proposed project or development. Any traffic control measures are to be evaluated based
on the requirements established in the Manual on Uniform Traffic Control Dmgemd-ces (MUTCD)
and by the City, and will be applied as necessary to ensure safe and efficient operation of the
City's transportation system. The analysis shall demonstrate the need for traffic control measures
considering the objectives and policies of the TMP and alternative site designs in order to
minimize or mitigate traffic impacts from the proposed project or development. The following
traffic control measures are to be addressed:
(1) Regulatory Signage, Markings and Islands: These traffic control measures shall be
applied as necessary in conformance with the MUTCD and City standards and policies.
(2) Traffic Signals: The installation of new traffic signals is not encouraged by the City and
all possible alternatives to signalization shall be evaluated before the installation of a new
traffic signal will be considered. The need for new traffic signals will be based on
warrants contained in the MUTCD and on City policies. In determining the location of a
new signal, safety and community traffic circulation and progression will be the primary
considerations. If a traffic signal is suggested as part of a mitigation package, and the
intersection lies within a series of coordinated traffic signals, then a progression analysis
may be required to ensure that adequate progression may still be provided. Generally, a
spacing of one-half mile between all signalized intersections is to be maintained, to
achieve optimum capacity and signal progression. Pedestrian and bicycle movements
shall be considered in all cases and adequate pedestrian clearance is to be provided in the
signalization design.
(3) Intersection and Access Locations: To provide flexibility and safety for the existing
roadway system and to ensure optimum two-way signal progression, an approved traffic
engineering analysis shall be made to properly locate all proposed intersections that may
require signalization, and any accesses to the proposed development.
2-10 DESIGN AND CONSTRUCTION STANDARDS Effective: November 16, 2000
9-7
c
(Q) Traffic Accidents
The Traffic Study may need to include accident analyses at one or more locations in the study area.
The Director shall specify whether such accident analyses are needed for each Traffic Study.
Where required, estimates of increased or decreased accident potential shall be evaluated for the
proposed project or development and appropriate safety related mitigation measures are to be
included. Traffic accident data is available from the City of Boulder's Police Department or from
the Director.
(R) Noise Attenuation
If residential development is planned adjacent to a roadway designated collector or greater, the
City may require noise attenuation measures. A discussion and analysis of noise attenuation
measured using the methods in the Fundamentals and Abatement of Highway Traffic Noise
Textbook is to be included in all traffic studies for residential developments adjacent to roadways
designated collector or greater.
(S) Recommendations
(1) The Traffic Study shall include a section in the report that provides any recommendations
of the Engineer. These recommendations shall include the Engineer's recommended
location, nature and extent of proposed transportation improvements associated with the
project or development to ensure safe and efficient roadway operations and capacity, and
compatibility with the City s transportation system and the goals of the TMP.
(2) These recommendations are to be supported with appropriate documentation and
discussion of the technical analyses, assumptions and evaluations used to make the
determinations and findings applied in the Traffic Study. In the event that any Traffic
Study analyses or recommendations indicate unsatisfactory levels of service on any study
area roadways, a further description of proposed improvements or mitigation measures to
remedy deficiencies shall be included.
(3) These proposed improvements or mitigation measures may include projects by the City or
The Colorado Department of Transportation for which funds have been appropriated and
obligated. These proposals may also include improvements to be funded and constructed
by the applicant as part of project or development construction. Assumptions regarding
future roads, widths and lane usages in any analyses are subject to the approval of the
Director.
(4) In general, the recommendation section shall include:
(a) Proposed and Recommended Improvements: Provide a detailed description and
sketch of all proposed and recommended improvements. Include basic design
details showing the length, width and other pertinent geometric features of any
proposed improvements. Discuss whether these improvements are necessary
because of development traffic or whether they would be necessary due to
background traffic. Specify the approximate timing necessary for each
improvement.
(b) Level of Service Analysis at Critical Points: Provide another iteration of the LOS
analyses that demonstrate the anticipated results of making recommended
improvements, such as movement LOS, operational and safety conditions and
conformance with the City's transportation system goals and TNIP. In association
Effective: November 16, 2000 DESIGN AND CONSTRUCTION STANDARDS 2-11
0
with LOS analyses for recommended improvements, include a comparison of
these results with the background LOS analyses without the proposed project or
development. Where appropriate, this step is to be provided for both near term
(year of project completion) and buildout scenarios.
(T) Conclusion
Include a conclusion in the report that provides a clear and concise description of the study
findings and recommendations, and serves as an executive summary.
(i) Revisions to Traffic Study
(1) Following City review, the Director may require revisions to a traffic study based on the
following considerations:
(a) Completeness of the study,
(b) Thoroughness of the level of service and impact analyses and evaluations,
(c) Compatibility of the study with the proposed access design, project or
development plan and local transportation system,
(d) Compliance with local and state regulations and design standards, and
(e) An analysis of study deficiencies, errors, or conflicts.
(2) Revisions may also be required as a result of public process with surrounding
neighborhoods and land uses or review by City. Council or the Planning Board.
Additional details requiring traffic study revisions may include, but are not limited to, the
following:
(a) An enlarged study area
(b) Alternative trip generation scenarios
(c) Additional level of service analyses
(d) Site planning and design issues.
2.04 Site Access
(A) Access Requirements
All accesses and curb cuts shall be designed and constructed in compliance with these Standards
and the requirements set forth in Section 9-953-3-14, "Site Access Control," B.R.C. 1981.
(B) Access Permit Required
All accesses and curb cuts proposed and constructed on City streets and alleys require a permit, as
set forth in Section " 3.3 15, "Site " 5. "Site Access Control," B.R.C. 1981.
(C) Location of Access
(1) Spacing: Table 2-1, "Access Spacing Requirements," shows the required spacing of
access points and curb cuts. Minimum spacing from corners shall be measured from point of
intersection of the street flowlines. Minimum spacing between accesses shall be measured at the
2-12 DESIGN AND CONSTRUCTION STANDARDS Effective: November 1a6, 22000 / ~(~/p,
raga
property line.
Table 2-1: Access Spacing Requirements
'-l~rrn,mnmaclllgz(38 e+~a~l_3' 4ther~1lestdentiaL'~, ommeitcla`1.;.Tn7ustrra7
:~'eetjmracnre8 from.r~ge~F - 1Resrdentia'1~ ~ s 4
Local Streets
- from property line 7.5' 10' 10' 10'
- from corner 20' 50' 50' 50'
- between accesses 15' 20' 20' 20'
Collector Streets Permitted only when no
other access is available.
from property line 10' 10' 10'
- from comer 50' 50' 50'
- between accesses 20' 20' 20'
Arterial Streets Permitted only when no
other access *v
--from property line 75' 75' 75'
- from comer 150' 150' 150'
- between accesses 250' 250' 250'
(2) Alignment: Accesses shall intersect City streets at a 90-degree angle. Accesses to
properties on opposite sides of a collector or arterial, where turning movements are not
controlled by a center median or access island, shall either be aligned, or offset by at least
150 feet on collectors, or at least 300 feet on arterials. Greater offsets maybe required if
left-tum storage lanes are required.
(3) Relocation of Existing Access Points and Curb Cuts: Relocation, alteration, or
reconstruction of any existing access points and curb cuts shall meet the requirements of
these Standards.
(D) Sight Distance
All access points and curb cuts shall provide adequate sight distance as set forth under Section
9-3-3-32-7, "Sight Distance," B.R.C. 1981.
(E) Restriction of Turning Movements
Along streets designated arterial or greater, or where necessary for the safe and efficient movement
of traffic, the City will require access points and curb cuts to provide for only limited turning
movements, as follows:
(1) Access With Barrier Island - Left-Turn Restrictions ("Pork Chop"): Where restricted
turning movements are required by the City, and where the abutting street does not have a
median, a barrier island will be required.
Effective: November 16, 2000 DESIGN AND CONSTRUCTION STANDARDS 2-13
adb
(a) Islands shall have a minimum area of 150 square feet, be bounded by vertical
curb, and have an appropriate concrete center surface treatment, approved by the
Director.
(b) Barrier island lanes shall be at least 12 feet wide, have a radius of at least 20 feet,
and be designed to accommodate the largest vehicle using the access on a daily
basis. The island shall provide congruent curb ramps or cut throught for
sidewalks. The minimum width of the island along the abutting roadway frontage
shall be 30 feet for right-in, right-out only islands, and 15 feet for islands allowing
right-in, right-out and a left-turning movements.
(2) Access With Median Divider Barriers - Left-Turn Restrictions: Median barriers may
be permitted where a median design can improve traffic circulation and safety, or overall
site access. Where permitted, medians shall be at least 4 feet wide, and shall extend at
least 25 feet beyond the right-of-way.
(F) Traffic Control
All accesses shall be designed and constructed with appropriate traffic control and signage
conforming to the MUTCD, B.R.C. 1981, and these Standards.
(G) One-Way Access Lanes
One-way access lanes may be permitted where restricted access is limited to one turning
movement, or where the one-way access improves traffic circulation and safety. One-way access
lanes shall be at least 12 feet wide, have at least radius of 20 feet, and be designed to accommodate
the largest vehicle using the access on a daily basis.
(H) Speed Change Lanes
Speed change lanes shall be required on collectors or arterials when the design hour vehicles from
the access will meet or exceed the standards in Section 4.8 of the Colorado State Highway Access
Code. Design of speed change lanes shall conform with Subsection 2.07(D), "Horizontal
Alignment," of these Standards.
(1) Access and Curb Cut Type
(1) Driveway Ramp and Curb Cut: All new accesses and curb cuts shall be designed as
driveway ramps and curb cuts, using the standard ramp driveway details provided in
Chapter 11, except as allowed in Subsection (b), along streets where no curb and gutter
exists, or for single family lots where roll-over curbs have been provided.
(2) Radii Curb Returns: Radii curb return accesses may be required or permitted by the
Director under the following conditions:
(a) The access is located along an arterial or collector.
(b) Access volumes indicate a need for a radii curb return where the ADT exceeds
500 or where speed change lanes would be required.
(c) The access is designed to restrict turning movements, requiring the installation of
an access island or center median.
(d) The roadway has no curb and gutter.
(e) The access serves an industrial property, or provides for commercial deliveries,
2-14 DESIGN AND CONSTRUCTION STANDARDS Effective: November 16, 2000
5~ ~
where large truck movements'are required.
(f) The Director determines that a radii access is necessary to ensure adequate traffic
safety and operation.
(g) The access is for a new public street
Table 2-2: Access Design Specifications
4 h ~ 3
E' ' ' , ,~Smgle~ lDther ~ . ,Gommeclcral ~ ndusttral
g IYesrdeuhl slde_ufial
Widtb (in feet)
- Minimum 10 10 15 20
- Maximum 20 35 35 35
- One-Way Lane N/A 12-18 12-20 14-24
Radii (in feet)
- Minimum N/A 15 15 20
- Maximum N/A 30 30 40
Access Grades
Initial Grade (to a point 10
ft beyond ROW) -
-Minimum 3% 1% 1% 1%
- Maximum 8% 6% 6% 6%
Final Grade (G2)
-Minimum 3% 1% 1% 1%
- Maximum 14% 8% 8% 8%
Max Grade Break 10% 6% 6% 6%
(.n Access and Curb Cut Width
Access and curb cut widths shall be consistent with Table 2-2, "Access Design Specifications," of
these Standards. The width of each access shall be the minimum width that is necessary to serve
the property and use. No more than 50 percent of the street frontage shall be occupied by the
access driveway, except for access to a cul-de-sac or flag lot. All access widths are measured from
edge of pavement to edge of pavement (or curb to curb) at the throat of the driveway (or edge of
the right-of-way), and are not inclusive of drive cut transitions or curb return radii.
(I) Access and Curb Cut Radii
Access and curb cut radii shall meet the specifications shown in Table 2-2, "Access Design
Specifications," of these Standards. All radii are measured from the flowline or from the edge of
the pavement where no flowline exists.
(L) Access and Curb Cut Grades
Access and curb cut grades shall be consistent with Table 2-2. The initial grade (Gl) shall be a
Effective: November 16, 2000 DESIGN AND CONSTRUCTION STANDARDS 2-15
ftwda Sili~MI
positive grade, beginning at the back of the sidewalk, the back of the driveway ramp or pan
section, or the edge of the pavement (where no curb and gutter exists), and shall continue at least
10 feet beyond the right-of-way. The final grade (G2) may be positive or negative, depending on
the access conditions. The maximum grade break (or change in slope) shall apply at all grade
changes. Additional grade changes may occur at intervals of at least 20 feet.
(NI) Driveways
(1) Vehicle Storage: Adequate driveway storage capacity for both inbound and outbound
vehicles to facilitate safe, unobstructed, and efficient traffic circulation and movements
from the adjacent roadway and within the development shall be provided, except for
single-family or duplex residential driveways on local streets. Adequate driveway length
will be subject to approval by the Director and shall extend at least 20 feet beyond the
right-of-way before accessing the first off-street parking space or parking lot aisle.
(2) Internal Circulation: Developments requiring off-street parking facilities shall provide
onsite vehicular circulation allowing access to all portions of the site without using the
adjacent street system, unless a joint access or parking casement with one or more of the
adjacent property owners has been dedicated.
(3) Backing Into the Right-of-Way Prohibited: Driveways shall be designed to contain all
vehicle backing movements onsite, except for single family or duplex residential uses on
local streets.
(4) Minimum Back-Up Distance for Detached Single-Family Residential Driveways
Accessing Public Alleys: Driveways shall provide for a minimum distance of 24-feet
from the rear of the parking stall or face of garage to the far edge of the adjacent alley
right-of-way or turn around area as required by Chapter 9- - "P cin~* Standards' ;
e.... eadi., n 'Tar ing De..ip e aaE1.,.a..' B.R.C. 1981.
(5) Shared Driveways (Detached Single-Family Residential Only): Shared driveways to
access detached single-family residential lots may be permitted pursuant to an approved
site review or subdivision as set forth in Chapter 9 ^ "r and DevelepmeR Wvie °,999.
-e e o ment Standards." B.R.C. 1981 or Chapter 9312, "Subdivisions," B.R.C. 1981, if
they meet the following criteria:
(a) A common parking court is provided at a ratio of 0.5 additional spaces per unit if
less than two onsite parking spaces, meeting City requirements, are provided on
each single-family lot served by the shared driveway.
(b) The shared driveway is no more than 100 feet long, except in districts zoned
IA7kRl,l ( _eSidential-I ow 1),
Pc-ERF ( -ai_c1e tial state), and RR--ERK-1.
( where the shared driveway may
extend up to 300 feet long if each lot accessing the shared driveway exceeds
10,000 square feet.
(c) The number of units served shall be no more than three lots or houses that have
less than 30 feet of usable frontage on the accessing street.
(d) Adequate turnaround for vehicles is provided either on an individual lot or lots.
(e) The driveway is properly engineered and constructed to mitigate any adverse
drainage conditions and is appropriately surfaced for the type of development,
2-16 DESIGN AND CONSTRUCTION STANDARDS Effective: November 16, 2000
5~
usage, and zoning district.
(f) The Driveway is at least 12 feet wide.
(g) For units not fronting on the accessing street, addressing shall be located near the
entrance to the shared driveway insuring visibility of the numbering from the
street.
(h) A public access easement, a minimum fifteen feet in width, for the benefit and use
of all properties and property owners accessing the shared driveway has been
dedicated and recorded to ensure legal access rights in perpetuity for each
property served.
(i) Driveway spacing conforms with the requirements in Table 2-1, "Access Spacing
Requirements," of these Standards.
2.05 Right-of-Way Requirements
Dedication or reservation of public right-of-way required as part of any project or development
proposal shall comply with the requirements set forth in Section n 3.3 14, ' o ese..,.a fie.
9-8. "Reservations. Dedication, and
Improvement of Rights-of-Wav " B.R.C. 1981.
2.06 Base Street and Alley Standards
(A) Base Street Standard
Except for residential streets approved pursuant to Chapter 9 ° "On-- ;r&
" u i isians, ' B.R.C. 1981, and Section 2, "Residential Streets," all new streets shall provide at
a minimum the base street standard components listed in Table 2-3, "Base Street Standard
Components."
(B) Base Alley Standard
Except for residential streets approved pursuant to Chapter 9 5, "Subdd viffll- s 9-12
"Sub 'c7 i ns," B.R.C. 1981, and Section 2.09, "Residential Streets," all new alleys shall provide
at a minimum the base alley standard components listed in Table 2-4, "Base Alley Standard
Components."
Table 2-3: Base Street Standard Components
Street'Component Base Standard
Right-of-Way 60'Minimum Width
Paved Street Section 36' Minimum Width, Curb Face to Curb Face
Travel Lanes Two Travel Lanes, Two-Way Traffic _
Curb and Gutter Required Both Sides
Parking Parking Allowed Both Sides
Sidewalks 5'Minimum Width, Detached, Required Both Sides
Streetscape Planting Strips- 8-' a&tred Width t6' Minimum]--,A~, Required Both Sides
Effective: November 16, 2000 DESIGN AND CONSTRUCTION STANDARDS 2-17
5L-F
*NOTE: In commercial streetside retail zones where 12-foot wide attached sidewalks may be provided, streetscape planting strips may be created
using street trees in planting pits with tree grates t 1--foot width between back of curb and back of walk),
Table 2-4: Base Alley Standard Components
r; .w > wC ° 5 s x
wA+v' Cf]101ii; 2'~.pt ~r apO'DIeRII g"a;`"x.La'b
11,
Right-of-Way 20'Minimum Width
Paved Street Section 18' Minimum Width, Pavement Edge to Pavement Edge
Travel Lanes Two-Way Traffic Allowed
Parking Parking on Alley Not Permitted
2.07 Street Geometric Design
(A) Minimum Requirements
Except for State Highways and the geometric design variations allowed for residential streets
approved pursuant to Chapter 9 5, "S 9-12. "Subdivisions " B.R.C. 1981, and Section
2.09, "Residential Streets," all city streets shall be designed in conformance with this section. The
design standards outlined in this section are minimum design standards, and all street design shall
meet or exceed these standards. On streets designated collector or arterial in the TMP, the
Director may specify standards to be applied to street design that may exceed the minimum
standards in this section based on functional need to ensure safe and efficient operation of the
street.
(B) Right-of-Way
The right-of-way width required for new streets shall comply with the requirements of Section
n 3 11, "D............4:..« PaEA .°s:.... aad bffi -eyefnei4 ePRi hts ag \r1..., 9=_8 "Reyemations
Dedication, and hnnrovement of Riehts of-Wav." B.R.C. 1981, and shall include without
limitation the following elements:
(1) The paved roadway section including without limitation travel lanes, turning and speed
change lanes, transit lanes, bicycle lanes, and parking lanes;
(2) Curbs and gutters or drainage swales;
(3) Roadside and median landscaping areas;
(4) Sidewalks and multi-use paths; and
(5) Any necessary utility corridors.
2-18 DESIGN AND CONSTRUCTION STANDARDS Effective: November 16, 21~p0
i/+0-rs3 a ix. " 6SS a, - 0
-
(C) Lane Width
Street lanes shall meet the minimum width specifications shown in Table 2-5, "Minimum Street
Lane Widths," of these Standards.
Table 2-5: Minimum Street Lane Widths
_ ~Cmavelanei±* ~ , < ,Au~IharS*1L°anes* ~®n~5treeElBicydle'7laries l'at~lnng~Iaues ~,3
11' 10' ~6', with parking lane :~=Kfrom curb face
6.5' from curb face w/out
parking lane
NOTES: Travel and Auxiliary lane dimensions do not include gutter pan width. Auxiliary lanes include, without limitation, turning and speed
change Imes.
(D) Horizontal Alignment
(1) Conformance to Street Plan: Horizontal alignment shall conform to the pattern of streets
in the Boulder Valley Eenit3"Comnrehensive Plan, TNT, and adopted right-of-way
plans and shall provide continuous alignment with existing, planned, or platted streets
with which they will connect.
(2) Extension to Property Line: All streets shall be extended to the property lines across the.
property to be developed, unless the street to be constructed has been approved by the City
as a cul-de-sac or other no-outlet street.
(3) Minimum Horizontal Curve: Street curvatures shall meet the minimum specifications
shown in Table 2-6, "Minimum Horizontal Street Curve Specifications," of these
Standards.
Table 2-6: Minimum Horizontal Street Curve Specifications
X :^i';` d t:x a.2 ':s - =#a "r "-x s t t 2'?53 ° y
1 ~.e~gn~6iatenra'~~£~"~"" (~nyy{ meet ~ ~eefox'e _ ~ ~ttem~3~SYreetr a
Minimum Design Speed 20 mph 35 mph 40 mph
Minimum Centerline Radius 100 feet 300 feet 500 feet
Minimum Reverse Curve Tangent 50 feet 100 feet 200 feet
Minimum Intersection Approach Tangent 100 feet 200 feet 300 feet
(4) Design Horizontal Curve: The design horizontal street curvature shall meet or exceed the
minimum horizontal curvature and be calculated using the following equation:
R = V2 / 15 * (e-f) aSrBericfton Factors
Where: E = rate of superelevation per foot ^ Design Speed Side Friction
F = side friction factor (mph) Factor (f)
V = vehicle speed in MPH 30 0.22
R = radius of curve in feet 35 0.20
40 0.15
45 0.16
(5) Intersections and Street Spacing
Effective: November 16, 2000 DESIGN AND CONSTRUCTION STANDARDS 22--1199 5t/P
(a) Angles: All streets shall intersect at right angles (90E).
(b) Minimum Street Spacing: Spacing between streets, as measured from centerline
to centerline. -shall equal or exceed the minimum distances shown in Table 2-7,
"Minimum Street Spacing," of these Standards.
Table 2-7: Minimum Street Spacing
*0105~ F-11- _ ..fi IImridw, CReG."pBWng -
Local 150 feet
collector 300 feet
Arterial 500 feet
(c) Street Spacing for Signalized Intersections: Signalized intersections shall be
spaced at half-mile intervals, although other locations maybe approved by the Director if
adequate signal progression can be maintained.
(c) Corner Radii: The minimum property line corner and flowline radii at
intersections shall meet or exceed the minimum radii specifications shown in
Table 2-8, "Minimum Intersection Radii," of these Standards.
Table 2-8: Minimum Intersection Radii
.Street,i pe;'- f 3VIininiumTip#1ine kadius Minimum Property-Radius
Local 25 feet 15 feet
Collector 30 feet 15 feet
Arterial 30 feet 10 feet
(6) Road Width Transition Tapers: Where two street sections or different widths are to be
connected, a transition taper is required between the outside traveled edge of the two
sections. The length of the transition taper shall be calculated using the following
equation:
L=WS
Where: S = Speed in MPH
L = Length in feet
W = Width of offset in feet
This transition is not
to be used in the design of left turn storage lanes or speed change lanes.
(7) Left Turn Lanes
(a) Storage Length: Left turn lane storage length shall be determined based on
traffic volumes using the Leisch nomographs provided in the ITE Guidelines for
Major Urban Street Design. The left turn lane storage length shall not be less
than 50 feet. Where dual left turn lanes are provided, the lane storage length shall
2-20 DESIGN AND CONSTRUCTION STANDARDS Effective: November 16 000
Asmda t
be based on at least 60 percent of the single lane storage length.
(b) Lane Change Taper: Left turn lane change tapers shall be calculated using the
equation for bay tapers in Subsection (8).
(8) Speed Change Lanes: Speed change lanes required for transitional access to turning
lanes shall be designed according to the design standards provided in the ITE "Guidelines
for Major Urban Street Design," as follows:
(a) Bay Tapers: Bay tapers are required for the lane transition from the travel lane
into a tam lane. The bay taper length shall be calculated using the following
equation:
L=WS/3
Where: S = Speed in MPH
L = Length in feet
W = Width of offset in feet
(b) Approach Tapers: Approach tapers are required to transition the position of
travel lanes to accommodate turn lanes. The approach taper length shall be
calculated using the following equation:
L= WS2/60
Where: S = Speed in MPH
L = Length in feet
W = Width of offset in feet
(9) Cul-de-sacs: Where allowed, cul-de-sacs shall have a minimum pavement diameter of 90
feet, curb face to curb face, and a minimum right-of-way diameter of 115 feet, except for
residential streets approved pursuant to Chapter 9 9, "°^'~dY..5.aiis,942. "Subdivisions."
B.R.C. 1981, and Section 2.09, "Residential Streets." Cul-de-sacs are prohibited on
arterial and collector streets, and are strongly discouraged on local and residential streets.
The Director may permit cul-de-sacs where there is no other possible street or driveway
access to a property from a public right-of-way, or if a cul-de-sac would avoid direct
property access to a collector or arterial.
(E) Vertical Alignment
(1) Minimum Street Grade: All street grades shall equal or exceed the minimum street
grade of 0.5 percent.
(2) Maximum Street Grade: Street grades shall not exceed the maximum street grades
shown in Table 2-9, "Maximum Street Grades," of these Standards.
Table 2-9: Maximum Street Grades
Street Type Maximum Street Grade
Local 8%
Collector 6%
Arterial 5%
Intersection Approach (Minimum 50) 4%
Effective: November 16, 2000 DESIGN AND CONSTRUCTION STANDARDS 2-21
, _
Signalized Intersection Approach (Min. 50) 2%
(3) Design Controls for Vertical Curves: Design control for sag and crest vertical curves,
(based on a design speed of 30 mph) shall meet the specifications shown in Table 2-10,
"Vertical Curve Design Control," of these Standards. For design speeds in excess of 30
mph, design control shall be in accordance with the current edition -QEj"A Policy on
Geometric Design of Highways and Streets," 1990 prepared by the American
Association of State Highway and Transportation Officials.
Table 2-10: Vertical Curve Design Control
~-w 11C x e r R
A5'„l.-'"t-` x,s.l°I°1Q.nP ''e- . .-ire,. i m. :..a v " rS..w .:::~Urox k?. +6 e I~uC¢~vCS .'~ehgth S4
0.5-1.0% 50 feet. 100 feet
1.0-3.0% 100 feet 100 feet
3.0-5.0% 200 feet 150 feet
5.0-7.0% 300 feet 200 feet
7.0-8.0% 300 feet 300 feet
Min. Vert. Sight Distance N/A 250 feet
(4) Vertical Sight Distance: Vertical curve sight distance shall equal or exceed 250 feet.
Greater vertical sight distance may be required by the Director to ensure safe travel and
street crossings for all transportation modes.
(F) Sight Distance
All streets and alleys shall provide adequate sight distance as set forth under Section 9-3.3-5,
"Sight Distance," B.R.C. 1981.
(G) Medians
The Director will require raised medians on new arterial streets. Raised medians may be permitted
on all streets subject to review and approval by the Director.
(1) Median Widths: Medians shall be at least 4 feet wide, curb face to curb face. If left turn
lanes are installed in the median, the median width adjacent to the left turn storage lanes
shall be 4 feet and the median width at the start of the left turn lane bay taper shall be at
least 14 feet wide, curb face to curb face. Median design widths shall conform to Table
2-11, "Median Width Design Standards," of these Standards.
Table 2-11: Median Width Design Standards
2-22 DESIGN AND CONSTRUCTION STANDARDS Effective: November 2000
~°3so ~
L
SNnnefion ti Mrq mnm s h k teaummended?OSlidth
Separation of Opposing Traffic 4 feet* 10 feet*
Pedestrian Refuge or Traffic Control Device Location 6 fwt* 14 feet
Medians Separating Left Tom Lanes 14 feet 20 feet
* NOTE: Cannot accommodate left-turn lanes
(2) Landscaping in Medians: Landscaping in medians shall comply with the requirements of
Chapter 3, "Streetscaping," of these Standards.
(1T) Vertical Clearance of Structures
At least 17.5 feet of vertical clearance shall be provided for all overhead structures. Vertical
clearance is measured from the crown of the street to the lowest portion of the structure on all
streets and alleys.
2.08 Sidewalks
(A) Required
Sidewalks are required on both sides of all new streets, except for residential streets that were
approved without required sidewalks pursuant to Chapter , " ,9-12. "Subdivisions."
B.R.C. 1.981, and Section 2.09, "Residential Streets."
(B) Conformance with the Transportation Master Plan
Off-street sidewalks may be required as part of any project or development proposal in
conformance with Section 6. 1, "Pedestrian Policy Plan," in the TMP.
(C) Compliance with Americans with Disabilities Act (ADA)
All public sidewalks shall comply with the requirements of the ADA's "Standards for Accessible
Design," which includes without limitation sidewalk widths, grades, locations, markings, surface
treatments, and access ramps.
(D) Minimum Widths
Sidewalk widths shall conform to the dimensions shown in Table 2-12, "Minimum Sidewalk
Widths," of these Standards.
Table 2-12: Minimum Sidewalk Widths
3 T Y K_ 4 1„
AlIaR11aI11~ultdeR'aluiI~W 1 G
Adjacent Land Use
Street Type Commercial/Retail Commercial/Industrial Residential
Local 12 5 4
Collector 12 5 5
Arterial 12 8 8
Effective: November 16, 2000 DESIGN AND CONSTRUCTION STANDARDS 2-23
Note: All off-street multi-use/bike paths designated in the Transportation Master Plan shall be 12
feet wide.
(E) Vertical Grades
The vertical grade of a sidewalk shall not exceed 8.33 percent, a ratio of 12 feet horizontal to 1
foot vertical (12:1).
At sidewalk locations adjacent to transit stops or transfer points, the Director may require wider
sidewalk sections to provide for adequate passenger storage areas.
(F) Vertical Clearance
A_minimum f oc t vertical clearance shall be provided between _al_I sidewalk an_d mt Iti ~e~ath_
8 c s anv Ov r~head encroachments.
2.09 Residential Streets
(A) Purpose
(1) The residential street standards were developed to allow a variety of choices in the
creation of new transportation corridors within the urban environment under conditions
that will not compromise the safety and function of the city street system. Traditionally
streets have provided the following:
(a) Corridors for pedestrian, bicycle, transit, and motor vehicle movement;
(b) Parking for vehicles;
(c) Fire, police, and emergency access;
(d) Locations for public utilities networks including water supply, sewage, electricity,
telecommunications and gas services, and refuge disposal; and
(e) Postal and other delivery services.
(2) These standards recognize that streets, if appropriately designed, may provide additional
community amenities including landscape buffers, attractive public gathering spaces,
opportunities for neighborhood interaction, public art, view corridors, and potential
avenues for new technologies.
(B) Scope
(1) Location of Streets
(a) These standards are intended to be used for new streets in undeveloped areas of
the city.
(b) Where infill development in the existing developed portions of the city requires
the creation of new streets, these alternative standards may be used if the Director
finds, after completing the review process described in Section (C) below, that the
new streets will not impair the functions of the surrounding transportation system
nor negatively impact the character of the surrounding existing development.
2-24 DESIGN AND CONSTRUCTION STANDARDS Effective: November 16_2000
(c) Further, the Director may determine that these standards are appropriate for
redesigning and reconfiguring existing streets. Because the public cost of
retrofitting, reconfiguring, or redesigning existing streets is often expensive,
decisions about reconstruction of individual streets in accordance with these
standards shall be made pursuant to the city's Capital Improvements Program
process.
(2) Methods of Review
(a) Permitted: The following street types may be developed without review:
(i) Residential collector street
(ii) Residential street
(iii) Residential alley
(b) By Director Review: Residential streets listed in paragraph (B)(2)(a) and the street
types listed below may be developed upon approval by the Director under the
criteria outlined in Section (C) below.
(i) Rural residential street
(ii) Access street
(iii) Access lane
(c) By Site Review: Those underlined criteria and specifications in the following
residential street standards may be appropriate for modification under certain
limited circumstances. Developments requesting such modifications shall meet all
of the requirements of Section 9-4-11, "Site Review," B.R.C. 1981, in addition to
the criteria outlined in Subsection (C), "Director Review," below.
(3) Cumulative Standards: These street standards are intended to be used in combination
with Section 2.079, "Street Geometric Design," of these Standards. Where the standards
in this section are silent, the criteria or specifications contained in Section 2.079 shall
control.
(C) Director Review
(1) Application: As part of a subdivision application, the applicant for residential street
construction approval shall include plans that depict the building envelopes of all
proposed structures, and the location of proposed trees, street furniture, fire hydrants,
meter pits, utility cabinets, or pedestrians in the right-of-way.
(2) Criteria: The Director will consider the following factors in determining whether an
alternative street design is appropriate in a particular location:
(a) Urban Design: The street should contribute to the creation of an attractive
community and to a clearly defined sense of place. Streets shall be designed with
due attention to building spacing and setbacks, green spaces, attractive materials,
plantings, and landscaping. Pavement and right-of-way widths that are less than
the Residential Street standard should provide a benefit to the community that
includes improved safety, improved site design, the creation of street canopies
through landscaping, and secondary lot access through the use of alleys. Rural
Effwtive: November 16, 2000 DESIGN AND CONSTRUCTION STANDARDS 25
Residential streets shall be consistent with the existing character of the area, or
with an approved subcommunity or area plan.
(b) Street Function: The street should be designed according to its function. This may
require a diversity of street types, each serving a role in a hierarchical system.
The street pattern and any reduced pavement or right-of-way widths should
provide acceptable levels of accessibility, safety and convenience for all street
users, including emergency service providers. The pattern shall discourage
residential streets from operating as pass through traffic routes for externally
generated traffic, while minimizing the length of time local drivers need to spend
in a low-speed environment.
(c) Connectivity: The neighborhood street pattern should be simple, and logical, with
the following characteristics:
(i) "No outlet" streets will be highly discouraged and allowed only when
street connectivity is unachievable:
(ii) The street pattern provides for safe and convenient movements for
pedestrians, bicycles, and motor vehicles, including transit.
(d) Design Sneed: The design of the streets will control vehicular speeds under
normal driving conditions to that specified in the residential street standards,
while maintaining reasonable access for emergency vehicles.
(e) Minimize Maintenance Costs: The street will not create additional city obligations
for maintenance and repair that exceed a standard street section.
(f) Adequate Parking: The site design provides for adequate on-street and off-street
parking to serve the area.
(g) hlfill Streets: In the case of infill development, the residential street design will
not impair the functioning of, and will have a compatible transition to, the
surrounding street system and will not negatively impact the character of the
surrounding existing development. No additional density may result from
approval of the reduced rights-of-way provided for in the case of Access Streets,
Access Lanes, or Residential Alleys.
(D) Residential Street Sections
Five residential street sections and a residential alley may be applied to the design of residential
neighborhoods as part of subdivisions approved pursuant to Chapter n < «S, 9-1
"Subdivisions," B.R.C. 1981. Residential streets shall be designed in compliance with the
standards outlined in Table 2-13, "Residential Street Design Standards," "Technical Drawings
2.63 - 2.68," Chapter 11, of these Standards, and the requirements of this Section.
(1) Residential Collector Street: The residential collector street collects and distributes
neighborhood traffic from residential streets to community collector and arterial
transportation systems, and provides access to individual properties. The residential
collector street is designed for residential streets where anticipated traffic volumes range
from 1,000 to 2,500 vehicle trips per day. In addition to the requirements outlined in Table
2-13, "Residential Street Design Standards," and "Technical Drawing 2.63," Chapter 11,
the residential collector street shall be designed to meet the following minimum standards:
2-26 DESIGN AND CONSTRUCTION STANDARDS Effwfive: November 16, 2000
Mmma ftw
(a) Parkins: On-street parking is allowed on both sides.
(b) . Bicycle Facilities: Additional street and right-of-way width shall be provided
where onstreet bicycle lanes are required by a City-adopted subcommunity or area
plan, the TNT, or the BVCP.
(c) Provision of Alleys: Where alleys are provided or required to be provided under a
City-adopted subcommunity or area plan, onsite parking spaces shall be accessed
from the alley and not the street. -
(d) Emergency Response: Residential collectors exceeding 500 feet in length from
any intersection shall provide a secondary emergency access at 500-foot intervals.
(2) Residential Street: The residential street is designed to provide access to individual
properties as well as access to the higher classification street network. The residential
street provides for neighborhood circulation and may carry neighborhood traffic and
through movements. The residential street is designed to cant' traffic volumes in the range
of 500 to 1,000 vehicles per day. In addition to the requirements outlined in Table 2-13,
"Residential Street Design Standards," and "Technical Drawing 2.64," Chapter 11, the
residential street shall be designed to meet the minimum standards shown in Table 2-13,
"Residential Street Design Standards," of these Standards.
Effective: November 16, 2000 DESIGN AND CONSTRUCTION STANDARDS 2-2-277 `
Table 2-13: Residential Street Design Standards
Design 32es1dential Resiiilenttaltaral Type;= Access. _ Access desidential
Standards Gollector RStceet ResidentiaC`; `Street Zane Alley
Street
Design Speed 25 mph 25 mph 20 mph 15 mph 10 mph 10 mph
Design Traffic Volumes 1,000 - 2,500 500 -1,000 500 - 1,000 400 250 N/A
(Vehicle Trips Per Day)
Minimum Right-of-Way 60' 60' 60' 40' 30' 16'
Minimum Pavement 32' 30' 22' plus 2' 26' 20' 12'
Section gravel
shoulders
Sidewalk 5' 4' 4'where 4' N/A N/A
required
Streetscape Planting Strip 8' 8' N/A N/A N/A N/A
Minimum Centerline 300' 150' 150' 100' 100' 100'
Radius
Minimum Curb Radius 20' 20' 20' 10' 10' 10'
Maximum Length Between 500' 500' 500' 350' 350' N/A
Connecting Streets
Maximum Street Length - 500' 500' 500' 150' 150' 500'
No Outlet
Maximum Street Length- 500' 500' 500' 500' 500' 500'
Loop or Circle Street
Minimum Tum-Around 35' Radius 35' Radius 30' Radius or 30' Radius 25' 25' Radius or
Area "Y" or `T' or "Y" or Radius or `IT, or "r'
Turn ".L,' Turn "Tl or Turn
`T' Turn
Emergency Response Set N/A N/A N/A 150' 150' N/A
Up Area Intervals
Sidewalk Placement Detached Detached Adjacent to Attached N/A N/A
Required Required Property Line
Where Reqd.
Curb and Gutter Required Required N/A Required N/A N/A
On-Street Parking Allowed Allowed Allowed Allowed Allowed Not Allowed
Minimum Lot Frontages N/A N/A N/A 60' no alley 60' N/A
4O' w/alley
Maximum Number of Units N/A N/A N/A 25 15 N/A
to be Accessed snel-fam snel-fam
NOTE: Residential street standards that are underlined maybe varied through Section 94-11, "Site Review," B.R.C. 1981.
2-28 DESIGN AND CONSTRUCTION STANDARDS Effective: November 16 2000
Acukda K= -a 0
(a) Parkin E: Parking is allowed both sides or, on residential streets where parking is
restricted or prohibited, off-street parking courts providing parking spaces at a
ratio of 0.5 spaces per dwelling unit shall be provided.
(b) Bicycle Facilities: Additional street and right-of-way width shall be provided
where on-street bicycle lanes are required by a City-adopted subcommunity or
area plan, the TAP, or the BVCP.
(c) Provision of Alleys: Where alleys are provided or required to be provided under a
City-adopted subcommunity or area plan, onsite parking spaces shall be accessed
from the alley and not the street.
(d) Emergency Response: Residential streets exceeding 500 feet from any intersection
shall provide a secondary emergency access at 500-foot intervals.
(3) Rural Residential Street: The rural residential street is designed to provide access to
individual properties as well as access to the higher classification street network. The
rural residential street provides for neighborhood traffic and through movements, and is
designed to carry traffic volumes in the range of 500 to 1,000 vehicles per day. The rural
residential street shall be provided where prescribed by a City-adopted subcommunity or
area plan to maintain the rural character of an area or neighborhood. The rural residential
street is a curbless paved street section, with gravel shoulders for parking and open
roadside ditches for drainage. In addition to the requirements outlined in Table 2-13,
"Residential Street Design Standards," and "Technical Drawing 2.65," Chapter 11, the
rural residential street shall be designed to meet the following standards:
(a) Parking: Allowed on both sides of the street.
(b) Turnaround Standard (No Outlet Streets): If a "Y" or "T" turnaround is proposed
in place of a standard cul-de-sac bulb turnaround, the "Y" or "T" turnaround shall
be designed 60 feet long and 20 feet wide. The turnaround area (including
sidewalks if required) shall be contained within the dedicated right-of-way.
(c) Provision for Future Sidewalks: If sidewalks are not required at the time of initial
street construction, adequate space in the right-of-way shall be reserved for a
future sidewalk and commitments from adjacent property owners to participate in
assessment districts shall be obtained, so that sidewalks can be added and funded
in the future when they are appropriate.
(d) Sidewalk Placement (Where Required): Sidewalks shall be required where
vehicular traffic volumes are anticipated to exceed 1,000 trips per day, on routes
to school, and as prescribed by a City-adopted subcommunity or area plan.
Sidewalks shall be placed outside of the paved roadway and drainage ditch, and
inside the right-of-way line.
(e) Roadside Drainage Ditches: Sideslopes along roadside drainage ditches shall be
4:1, and driveway culverts, at least 12 inches in diameter with flared end sections
or headwalls, shall be installed by owners at driveways.
(f) Land Use Requirements: Lot frontages shall be at least 60 feet wide, unless alley
access is provided. Lot frontages with alley access shall be at least 40 feet wide.
Two onsite parking spaces, meeting all City requirements, shall be provided on
each single-family lot.
Effective: November 16, 2000 DESIGN AND CONSTRUCTION STANDARDS 2-29
C rtmio ~
(g) Provision of Alleys: Where alleys are provided or required to be provided under a
City-adopted subcommunity or area plan, onsite parking spaces shall be accessed
from the alley and not the street.
(h) Emergency Response: Rural residential streets exceeding 500 feet from any
intersection shall provide a secondary emergency access at 500-foot intervals.
(4) Access Street: The access street provides public access to no more than 25 single-
dwelling units, where anticipated vehicular volumes would not exceed 400 trips per day.
The access street is narrow, to ensure slower speeds for vehicular travel, and provides
sidewalks along both sides of the street. In addition to the requirements outlined in Table
2-13, "Residential Street Design Standards," and "Technical Drawing 2.66," Chapter 11,
the access street shall comply with the following minimum standards:
(a) Parkin : Parking is allowed on both sides of the street or, if parking is not
provided on-street, a parking court at a ratio of 0.5 spaces per dwelling unit is
required.
(b) "L" Intersections: "L" intersections maybe permitted as part of subdivision, and
are subject to approval by the Director. Where permitted, "L" intersections shall
have at least a 150-foot-long tangent street section from the intersection to the
closest curvature and a minimum corner radius of 50 feet.
(c) Circle or Loop Street: If a circle or loop street is proposed as part of subdivision,
the street shall connect to a higher classification street, or connect to two separate
perpendicular or offset higher classification streets.
(d) Turnaround Standard (No outlet streets): If a "Y" or "T" turnaround is proposed
in place of a standard cul-de-sac bulb turnaround, the "Y" or "T" turnaround shall
be designed with a 60 foot length, 20 foot width. The turnaround area (including
sidewalks if required) shall be contained within dedicated right-of-way.
(e) Land Use Requirements: A residential access street shall connect to a higher
classification street. Lot frontages shall be at least 60 feet wide, unless alley
access is provided. Lot frontages with alley access shall be at least 40 feet wide.
Two onsite parking spaces, meeting all City requirements, shall be provided on
each single-family lot.
(f) Provision of Alleys: Where alleys are provided or required to be provided under a
City-adopted subcommunity or area plan, onsite parking spaces shall be accessed
from the alley and not the street.
(g) Emergency Response: Access streets exceeding 175 feet from any intersection
shall provide a fire apparatus setup area at 150 foot intervals. The setup area shall
provide at least 30 foot long, 25 foot wide clear zone, and is subject to approval
by the Fire Department.
(5) Access Lane: The access lane provides public access to no more than 15 single family
dwelling units, where anticipated vehicular traffic volumes would not exceed 250 trips per
day. The access lane is a narrow "shared street" for all modes of travel (vehicular, bicycle,
and pedestrian), without curb and gutter or sidewalks, and must connect with a higher
classification street. In addition to the requirements outlined in Table 2-13, "Residential
Street Design Standards," and "Technical Drawing 2.67," Chapter 11, the access lane
2-30 - DESIGN AND CONSTRUCTION STANDARDS Effective: November 16, 2000
Eel P. M
shall comply with the following minimum standards:
(a) PParking: Parking is allowed.
(b) "L" Intersections: "L" intersections shall have a minimum 150-foot long tangent
street section from the intersection to the closest curvature and a minimum comer
radius of 50 feet.
(c) circle or Loop Street: A circle or loop street shall connect to a higher
classification street, or connect to two separate perpendicular or offset higher
classification streets.
(d) Turnaround Standard (No outlet streets): A "Y" or "T" turnaround shall be
designed with a 60 foot length, 20 foot width. The turnaround area (including
sidewalks if required) shall be contained within dedicated right-of-way.
(e) Land Use Requirements: An access lane shall connect to a higher classification
street. Lot frontages shall be at least 60 feet wide. Two onsite parking spaces,
meeting all City requirements, shall be provided on each single-family lot. If the
minimum lot frontage requirement is not met, additional parking spaces shall be
provided at a ratio of 0.5 spaces per dwelling unit as a part of the subdivision.
These required spaces shall be located on private property.
(f) Right-of-Way Landscaping: Landscaping other than ground cover or low
shrubbery shall be placed outside of the right-of-way.
(g) Emergency Response: Access streets exceeding 175 feet from any intersection
shall provide a fire apparatus setup area at 150 foot intervals. The setup area shall
provide a minimum 30-foot long, 25 foot wide clear zone„and is subject to
approval by the Fire Department.
(6) Residential Alley: The residential alley is to provide secondary vehicular access to the
rear of lots in detached single-family dwelling subdivisions with narrow street frontages,
in order to limit curb cuts from the street and increase on-street parking. Alleys are most
beneficial when lot widths are narrower than 50 feet. In addition to the requirements
outlined in Table 2-13, "Residential Street Design Standards," and "Technical Drawing
2.68," Chapter 11, the residential alley shall be designed to meet the following minimum
land use requirements: Backup distance for parking and garage access from the alley shall
be 24 feet, including the 16-foot alley right-of-way width, and the remaining backup
distance shall be provided on the lot being served.
2.10 Emergency Access Lanes
(A) Emergency Access Required
All industrial, commercial, and residential developments shall provide adequate emergency vehicle
access. Adequate emergency access is a minimum 20 foot wide unobstructed fire apparatus access
road with an unobstructed vertical clearance of 1'1-.5 feet, and meets all applicable standards as set
forth in-ge 2- the " current adopted { iferffi Fire
Code.
Effective: November 16, 2000 DESIGN AND CONSTRUCTION STANDARDS 2-31
Asants rMMEc
(B) When Emergency Access Lane is Required
When adequate emergency access is not available from a public street, an applicant for
construction approval shall construct an emergency access lane. Emergency access lanes must
accommodate all emergency vehicles, including fire equipment.
(C) Secondary Emergency Access
Secondary emergency access lanes shall be provided to structures whenever the distance to the
nearest public street equals or exceeds 500 feet. Secondary access lanes shall conform to all
design requirements specified for emergency access lanes.
(D) Local Emergency Access Lane Standards
In addition to the emergency access standards set forth in geet4en '
e€the current adopted ' O°'' O°' Tn -d-nrFire Code, an emergency access lane shall equal or exceed
the following standards:
(1) Direct Route: Emergency access lanes shall provide the shortest practical direct access to
points of concern, and be entirely contained within a minimum, continuous 20 foot wide
emergency access easement or public right-of-way.
(2) Distance From Structure: Emergency access lanes shall be provided whenever a
structure is located more than 150 feet from fire apparatus access.
(3) Surface: An emergency access lane shall consist of either of the following:
(a) Two concrete strips at least 4 feet wide, with a 4-foot separation between them.
Vegetation other than grass shall not be permitted in the separation area.
(b) A minimum continuous paved surface width of 12 feet.
(4) Radius: An emergency access lane shall provide a minimum taming radius of 25 feet, or
the radius needed to accommodate an SU-30 vehicle.
(5) Turnarounds: If the length of the emergency access lane exceeds 150 feet (without an
outlet accessible to emergency vehicles), then a turnaround with a minimum radius of 45
feet shall be provided.
(6) Grade: The grade for an emergency access lane shall not exceed five percent.
Exceptions may be allowed with specific approval from the City of Boulder Fire Chief
where this standard cannot be met due to topographical conditions.
(7) Vertical Clearance: Vertical clearance from the surface of the emergency access lane
shall be at least 1'7-.5 feet.
(E) Unobstructed Access
Emergency access lanes shall be kept free and clear of all obstructions. If the Director or Fire
Chief determines that barriers are needed to prevent automobile traffic from using an emergency
access lane, then the applicant for construction approval shall install traffic bollards. Traffic
bollard designs shall provide for immediate access of emergency vehicles, without requiring these
vehicles to stop and maneuver around, or unlock, any structures. The Director and Fire Chief shall
have final approval of all bollard designs.
2-32 DESIGN AND CONSTRUCTION STANDARDS Effective: November 16, 22000 /l/',
(F) Access Identification
Signs and pavement markings will be required if necessary by the Director and Fire Chief to
delineate and identify emergency access lanes. All signage for emergency access lanes shall
conform with the specifications in the MUTCD.
2.11 Bicycle Facilities and Multi-Use Path Design
(A) Conformance with Bicycle System Plan
The arrangement, type, and location of all bicycle paths, trails, and routes shall conform with the
"Bicycle System Plan" section in the TNT. All new construction shall conform to the standards
for bicycle lane facilities outlined in this section, the "Guide for the Development of Bicycle
Facilities" prepared by the American Association of State Highway and Transportation Officials
and the "Regulatory Negotiation Committee on Outdoor Developed Areas" prepared by the United
States Architectural and Transportation Barriers Compliance Board (Access Board).
(B) On-Street Bike Lanes - Streets Without On-Street Parldng
Bicycle lanes on new streets without on-street parking shall be at least 5 feet wide, exclusive of the
curb pan, or 6.5 feet from the face of any curb. On existing streets where on-street bike lanes are
being added and available right-of-way or improvements space is restricted, the width of the
bicycle lane may be reduced to at least 5 feet wide, inclusive of the curb pan.
(C) On-Street Bike Lanes - Streets With On-Street Parking
Bicycle lanes on new streets with on-street parking shall be at least 65 feet wide, exclusive of the
parking lane, or 143 feet from the face of any curb. On existing streets where on-street bike lanes
are being added and available right-of-way or improvements space is restricted, the width of the
bicycle lane may be reduced to at least 5 feet wide, exclusive of the parking lane, or 12 feet from
the face of any curb.
(D) Off-Street Bike Paths or Trails
Design for off-street bike laRes,,-trails or paths shall conform to the design guidelines detailed in
the City's "Greenways Design Guidelines"adopted as part of the Tributary Green ways Master
Plan. Off-street bike dies-trails or oaths shall be at least 10 feet wide with an inside edge radius
of at least 15 feet and shall conform to Technical Drawing 2.04.B.
(E) Bicycle Parking
ic~cle~arkirtg should be located in a visible and prominent IocatiQn that is lit at night and
nhvsically separated from automobile narking to prevent vehicles from intruding into the bike
parking area. All bicycle parking constructed in the City of Boulder shall conform to the
provisions in the Section 9-3-d 39-6 , `Bicycle Parking," B.R.C. 1981 or as adopted in any
subcommunity or area improvement plan.
(1) Bicycle R*e#s-ParldII in Public Right-of-Way: Bicycle parking racks located in the
public right-of-way shall be designed using either the inverted "U" standard or the Cora
style rack. A minimum aisle of 5 feet shall be provided for bikes to maneuver in when
accessing the rack. All racks shall be attached to a concrete base using a high security
tamper proof anchor such as a- mushroom head carbon steel expansion anchor "spike"
#5550 as manufactured by Rawl or an equivalent theft-proof device.
Effective: November 16, 2000 DESIGN AND CONSTRUCTION STANDARDS 2-33
The inverted U rack is designed to park two bicycles, facing opposite directions, parallel
to the rack. For the rack to meet its design specification of parking two bikes, it must be
installed according to the specifications below, otherwise it will be considered to provide
parking for one bike. The inverted U standard may be installed with the following
conditions:
(a) Where the U rack is installed oriented parallel to a wall or curb, at least 243-0 feet
shall be provided between the parallel wall or curb and the center of the rack.
Where a bike rack is located near a curb with "head-in" automobile parking, a
minimum distance of 5 feet from the curb to the center of the rack is required to
avoid damage to bicycles or racks by automobiles extending across the curb over
the sidewalk.
(b) Where the U rack is installed oriented perpendicular to a wall or curb, a minimum
distance of 4 feet from the wall or curb to the center of the rack will be provided
to allow two bikes to access and use the rack.
(c) Where placed side-by-side, bike racks shall be placed at least 3.5 feet apart to
accommodate ease of access to the racks.
(d) Where placed in a4ki&saeh-arr-a series of 2 or more and U-Faek"parallel to a
wall, U racks will be separated by a minimum distance of 10 feet between the
centers of the racks to allow access to both sides of the rack.
(e) The location of a bike rack shall maintain a minimum unobstructed sidewalk
width of 6 feet from any bicycle parked properly in the bike rack.
(f) The location of a bike rack shall maintain a minimum unobstructed distance of 3
feet from any pedestrian curb ramp to any bicycle parked properly in the bike
rack.
The Cora style standard is designed to be loaded from both sides without an overlap of the
handlebars of the bicycles parked on the two sides. For the rack to meet its design
specification of parking bikes from both sides, it must be installed according to the
conditions below, otherwise it will be considered to provide half the rated bike parking.
The Cora style standard can be installed with the following conditions:
(a) Where a bike rack is located perpendicular to a curb with "head-in" automobile
parking, a minimum distance of 4-feet from the curb to the end of the rack is
required to avoid damage to bicycles or racks by automobiles extending across the
curb over the sidewalk.
(b) A minimum of 10 feet of clear space is required on both sides of a Cora style rack.
This provides 5 feet of space for bike parking and a 5-foot access aisle for both
sides of the rack. Wheren a series of racks are provides, a common 5-foot access
aisle can serve two racks.
(c) The location of a bike rack shall maintain a minimum unobstructed sidewalk
width of 6 feet from any bicycle parked properly in the bike rack.
(d) The location of a bike rack shall maintain a minimum unobstructed distance of 3
feet from any pedestrian curb ramp to any bicycle parked properly in the bike
rack.
2=34 DESIGN AND CONSTRUCTION STANDARDS Effective: November 1 9,2000
(2) Oncitg Bicycle Parking: Bieye,e pa4iRg should ...w.._,.,,.. ha
a
50 feet f he main bWldiag a tFaaea in visible .,n Y. romi«e..t 4neAtign
. Bicycle Parking Should generally be provided
wither 50 feet of the main building entrance. Racks must be installed according to the
guidelines in (1) above to reach their designed parking capacity. Otherwise} they shall
be credited with no more than half their design capacity. Bicycle parking racks or lockers
located on development or project sites or in parking lots outside of public right-of-way
shall generally be selected from the following standards:
(a) Inverted "U" Rack: The inverted "U" rack is recommended for most bike rack
installations, and is one of the standards for bicycle parking in public
rights-of-way as required in Subsection (1) above. Each rack provides space for
two bicycles, and allows flexibility in parking by providing two supports for
attaching locks. The "U" rack may be used individually where space is limited, or
in clusters where space is available for concentrated bike parking.
'"~-Cora Style Racks: The Cora rack will accommodate more than eight
bicycles and is one of the standards for bicycle parking in public rights-of-way as
required in Subsection (1) above. The Cora style rack is recommended where
space exists for concentrated bike parking, such as in a parking structure or lot.
(c) Other Bike Rack Styles Another rack style may be approved by the Director of
Public Works if it meets the following criteria;
(i) Provides at least two contact points between the rack and the bike to
securely support the bike:
(ii) Provides at least a 2 foot by 6 foot parking space for each bike without the
need to lift the handlebars of one bike over those of another to nark;
(iii) Allows the frame and one wheel to be locked to the rack with a standard
high security U-shaped shackle lock
(iv) The rack is uncomplicated and intuitively simple for the bicyclist to use.
hd~
(Lockers: Bicycle lockers provide secure weatherproof storage for bike parking.
Lockers are recommended for employee and longer-term parking and
require adequate space, since they require more area than bicycle racks.
A.. ha rack st`4e T w be a.. e'1 by the Di..eate` of Publi" "N' JLs__i£it ak#s tl.
_
F 1 .,„.jai
b
O)P ,evi.les at least twe eentaot peii4s betwea.. the .-aek .,n the bil:a to ..eeufa15
...o- torcihe bike;
!"lp .'A at least a O feet by 6 f et . aFki..a sp o F` aeeh bike wi fiaet t the
4;sAd *R lift tho 4aadlebafs of eiae bike e*ff these of another to par*;
(iii) A llews the fFaFa. &ad e wheel to be looked to the reek with n standard birth
Effective: November 16, 2000 DESIGN AND CONSTRUCTION STANDARDS 2-35
leek.
2.12 Street Lighting
(A) Scope
The provisions of this section shall apply to public streets, and are subject to the
restrictions outlined in the Section 8 3 29 aLig itn Outdoor," B.R.C. 1981.
(B) Guidelines for Street Lighting
(1) Street Light Requests
(a) Public Service Company (PSC) of Colorado is responsible for providing street
lighting as requested by the City.
(b) Before considering new or additional local street light requests, the City will
require unanimous consent of all affected owners of property within 100 feet of
proposed street light locations and the support of at least 51 percent of the total
number of owners of properties within 500 feet of proposed locations.
(2) Costs: The installation costs of street light fixtures, excluding those that provide a
demonstrated safety need, shall be paid by the applicant requesting the installation. The
City will assume continued maintenance and energy costs associated with new
installations.
(3) Priorities for Installation: Streetlights may be provided on the basis of identified traffic
need with priorities established as follows:
(a) Reduction of an identified night time traffic accident problem correctable through
street light installation.
(b) Major traffic corridors with significant turning movement conflicts and night time
pedestrian activity.
(c) Major traffic corridors with significant night-time turning movement conflicts.
(d) Arterial and collector intersections and/or horizontal or vertical alignment
changes.
(e) Residential street lighting.
(f) Commercial alleys with significant night-time pedestrian activity.
(4) Design: Street lights installed in public rights-of-way shall be an energy efficient lighting
source (high pressure sodium or metal halide) with a minimum of ambient or reflected
light (full cut-off fixtures). The City has adopted the Illuminating Engineering Society's
(IES) American National Standard Practice for Roadway Lighting as the design standard
for all city streets, with the following modifications:
(a) Expressway and Arterial: Street lighting shall be based on IES standards.
(b) Other Streets: Street lighting may be provided at intersections and identified
2-36 DESIGN AND CONSTRUCTION STANDARDS Effective; Novembm l p,2000
CITY OF BOULDER
DESIGN AND CONSTRUCTION STANDARDS
CHAPTER 8
TRANSPORTATION STANDARDS
TABLE OF CONTENTS
Section PaRe
8.01 ADOPTION OF THE COLORADO DEPARTMENT OF TRANSPORTATION
(CDOT) STANDARD SPECIFICATIONS WITH MODIFICATIONS ..............................................332
(A) SECTION 401, PLANT MIX PAVEMENTS - GENERAL ......................................................................................33
(B) SECTION 403, HOT BITUMINOUS PAVEMENT ...............................................................................................443
(C) SECTION 605, SIDEWALKS AND MULTI-USE PATHS ......................................................................................534
(D) SECTION 610, MEDIAN COVER MATERIAL k6_4
(E) SECTION 703, AGGREGATES .........................................................................................................................7.76
(F) SECTION 612, DELINEATORS AND REFLECTORS ............................................................................................76
(G) SECTION 614, TRAFFIC CONTROL DEVICES? .................................................................................................7,76
(H) SECTION 627, PAVEMENT MARKING ....................................................................................................I.......9&'
(I) SECTION 713, TRAFFIC CONTROL MATERIALS 109=F
8.02 TRAFFIC SIGNALS .............................................................................................................................1130
8.03 TRAFFIC SIGNS AND STRJPI#GMARKINGS ..............................................................................11308
(A) REQUIRED ................................................................................................................................................II-m
(B) SIGNING AND STRIPING PLAN 1
(C) CONFORMANCE WITH MUTCD 124108
(D) MATERIALS ................................................................................................:.............................................12+80_
(E) PRIVATE STREET SIGNS 12_4-5
8.04 TEMPORARY TRAFFIC CONTROL PLAN T T11
A) REQUIRED 1111
~B) INTENT 121-1
(C) OBJECTIVES 114-1
Dl CERTIFICATE )N REGUTRLMENTS , 1244
E) CONFORMANCE WITH MUTCD 1244
co FNF'RA[ REOU[REMHNTS _ _ _ 12
(G) NON STANDARD CLOSURES 1
8.045 FIRE LANE SIGN SPECIFICATIONS ..............................................................................................12383
(A) SIZE ..........................................................................................................................................................1_4.-138
(B) MATERIAL ................................................................................................................................................151-35
(C) COLORS 3
(D) WORDING .................................................................................................................................................15-138
8.036 SIGNING FOR 11ANDIG kP*FD-A('t'FSSLRL E PARKING ..........................................................1~M3
(A) MATERIALS 15-14}
(B) REQumFD SIGNS ......................................................................................................................................15144
Effective: November 16, 2000 DESIGN AND CONSTRUCTION STANDARDS 8-11
Agmde
(C) SIGN PLACEMENT 15449
8.07 SIGNING FOR PARKING RESTRICTIONS ....................................................................................1444
A) SIZE. 1544
(B) MATERIAL ...151-4
LIST OF TABLES
Table Number Paze
Table 8-1: Marshall Method by Street Classification ................................................................................................443
Table 8-2: Hot Bituminous Pavement Design Mix ....................................................................................................534
Table 8-3: Minimum Voids in the Mineral Aggregate (VMA) ..................................................................................534
8-2 DESIGN AND CONSTRUCTION STANDARDS Effective: November 16, 2000
8.01 Adoption of Standards of the Colorado Department of
Transportation (CDOT) Specifications with Modifications
The current ver-&ien-edition of the "Colorado Department of Transportation- Standard
Specifications for Road and Bridge Construction" is hereby adopted by reference in these
sStdards as the City of Boulder transportation construction standards, except as specifically
amended by the provisions of this chapter.
(A) Section 401, Plant Mix Pavements - General
(1) Subsection 401.02, "Composition of Mixtures," is amended to incorporate the
following additions:
(a) A job-mix formula shall be submitted to the Director of Public Works for
approval prior to placing any hot bituminous pavement. The formula shall
indicate the aggregate gradation, asphalt cement content, hydrated lime content,
and optimum density. If requested by the Director, a sample of the aggregate and
asphalt cement shall be submitted for approval (for test purposes) prior to placing
any hot bituminous pavement.
(b) The job-mix formula for each mixture shall establish a single percentage of
aggregate passing each required sieve size, a single percentage of bituminous
material to be added to the aggregate, and a single temperature for the mixture at
the discharge point of the plant.
(c) When submitting the job-mix formula, the contractor shall supply certified test
results on all asphalt cements, aggregates, and mixes used for hot bituminous
pavement, and certify that all materials meet or exceed all required specifications
and tests.
(d) The Director reserves the right to sample materials and mixtures throughout
project construction to determine whether specifications and requirements have
been met and to confirm the certified test results. The contractor is responsible for
providing a bituminous mixture that meets the job formula and specifications.
(e) The contractor shall be responsible for providing adequate field testing of
materials used on the project and providing copies of the test results to the City to
assure compliance with these specifications.
(f) The top layer of hot bituminous pavement shall not contain any reclaimed asphalt
material, unless approved by the Director.
(2) Subsection 401.11, "Tack Coat," is amended to incorporate the following additions:
(a) A tack coat shall be evenly applied to all existing asphalt or concrete surfaces that
will be in contact with asphalt prior to hot bituminous pavement placement. A
slow-setting, diluted emulsion shall be used, diluted with one part water to one
part asphalt emulsion. The rate of application shall be 0.1 gallons per square yard
of diluted asphalt emulsion. Before dilution, the emulsified asphalt shall comply
with AASHTO M140 or M208.
(b) Only the amount of tack coat necessary for the day's operation is to be placed on
the surface. All traffic not essential to the work shall be kept off the tack coat.
(3) Subsection 401.12, "Surface Conditioning," is amended to incorporate the following
Effective: November 16, 2000 DESIGN AND CONSTRUCTION STANDARDS 8-3
Agenda Rem ALLPW 94-
addition: All vegetation shall be removed from any existing surface to be overlayed.
(4) Subsection 401.16, "Spreading and Finishing," is amended to incorporate the following
additions:
(a) The bituminous mixture shall be placed with an asphalt paver if possible. The
contractor shall receive permission from the Director to use placement methods
other than a paver. The lift thickness shall be at least twice the maximum particle
size for the hot bituminous pavement mix. The maximum lift thickness for the
final lift shall be 2 inches, unless otherwise approved by the Director.
(b) Areas to be patched shall be excavated and squared to a neat line, leaving the
sides of the excavation vertical. Prior to placement of the patch, the exposed sides
of the existing pavement shall be thoroughly coated with slow-setting Emulsified
Asphalt. Hot bituminous pavement shall then be placed and compacted in
succeeding layers; no layer shall be more than 3 inches deep.
(B) Section 403, Hot Bituminous Pavement
(1) Subsection 403.02, "Materials," is amended to incorporate the following additions:
(a) Design mixes shall be established using the Marshall Method of compaction. The
method will be applied based on street classification according to Table 8-1,
"Marshall Method by Street Classification."
Table 8-1: Marshall Method by Street Classification
Design Method Laboratory Compaction Street Classification
Marshall Method, ASTM D 1559 50 blows per side Local, Collector, and Minor
Asphalt Institute MS-2 Arterial (ESAL < 1 million)
Marshall Method, ASTM D 1559 75 blows per side Major Arterial (ESAL < 1 million)
Asphalt Institute MS-2
(b) The design mix for hot bituminous pavement shall conform to Table 8-2, "Hot
Bituminous Pavement Design Mix," and Table 8-3, "Minimum Voids in the
Mineral Aggregate (VMA)."
(c) The addition of any recycled material is subject to approval by the Director prior
to use in any asphalt mix. All mixes including recycled material shall meet all
standard specifications and contain no more than 10% recycled material.
(d) Hot bituminous pavement for patching shall be Grading C with AC-10 asphalt
cement.
(e) A minimum of one percent hydrated lime by weight of the combined aggregate
shall be added to all aggregate for hot bituminous pavement.
84 DESIGN AND CONSTRUCTION STANDARDS Effective: November 16, 2000 ~
rT
Table 8-2: Hot Bituminous Pavement Design Mix
Property Test Method Value
Voids, Percent. MS-2; AASHTO T269 3-5
Stability, Minimum MS-2; AASHTO T245 1800
Flow (0.01") MS-2: AASHTO T245 8-16
Aggregate retained on the No. 4 Sieve with at CP-45 70
least two Fractured Faces °1u Min.
Accelerated Moisture Susceptibility Tensile AASHTO T283 80
Strength Ratio (Lottman) Min.
Minimum Dry Split Tensile Strength, PSI AASHTO T283 30
Voids in Mineral Aggregate, VMA, % Min. MS-2 See Table 8.01-3
Grade of Asphalt Cement AC-10
Table 8-3: Minimum Voids in the Mineral Aggregate (VMA)
Design Air Voids
Nominal Maximum Size*, Inches (mm)** 3.0% 114.0% 5.0%
1 %z (37.5) 11 12 13
1(25-0) 12 13 14
(19.0) 13 14 15
'/z (12.5) 14 15 16
3/8 (9.5) 15 16 17
* The Nominal Maximum Size is defined as one sieve larger than the first sieve to retain more than 10%.
Interpolate specified VMA values for design air voids between those listed.
(C) Section 608, Sidewalks and Multi-Use Paths
(1) Subsection 6.08.03(e), "Joints," is ammended to incorporate the following additions.
All jointing of bikepath, bikeway, and bike trail concrete pavement shall be saw cut at the
nearest contraction joint and shall be removed and replaced full width. No partial removal
and replacement will be allowed. No longitudinal joints will allowed in either sidewalk or
bikepath concrete pavements.
(2) Subsection 6.08.03 9(g), "Pedestrian/Bike traffic," is added as follows:
Effective: November 16, 2000 DESIGN AND CONSTRUCTION STANDARDS 8-5
zo,
_6~1
Agonft am np Cm_
A well signed, safe, functional detour for pedestrians shall be provided whenever a
sidewalk is to be obstructed or blocked due to construction or any other activity. The
proposed detour shall be approved by the city prior to construction or blockage of the
sidewalk.
Sidewalks adjacent to any development type construction activity of any kind shall be
maintained at all times in an unobstructed and safe condition as set forth in Section 8-2-
11, B.R.C. 1981.
A well signed, safe, functional detour for bikes and pedestrians shall be provided
whenever an existing bikeway, bikepath or bike trail is obstructed or blocked due to
construction. The proposed detour shall be approved by the Director prior to construction.
The shall be of appropriate width as determined by the Director and shall be constructed
of asphalt or concrete so that it will function and can be maintained at all times and in all
weather conditions.
(D) Section 610, Median Cover Material
(1) Subsection 610.02, "Materials," is amended to incorporate the following additions:
Patterned concrete shall be colored concrete and meet the requirements of Section 601 with the following
exceptions:
Field Compressive Strength (28 days), psi 30004500
(Not a specification requirement)
Cement Content, lbs./cu. Yd., minimum 610
Max. Water/cement ratio tbs. Water/lbs. Cement 0-5-50.44
Entrained and Entrapped Air, percent 3-848
Slump, AASHTO T 119, inches 2-5
Coarse Aggregate, AASHTO M43 Size No. 8
Fine Aggregate, AASHTO M6, percent of total aggregate 50 - 78
(a) An approved water reducing admixture shall be used in the mix.
(b) The coloring agent shall be integral to the concrete mixture.
(c) The color and pattern shall be as defined in the plans as approved by the City.
(d) Colored wax curing membrane shall be as recommended by the supplier of the
coloring agent.
(2) Subsection 610.03, "Construction Requirements," is amended to incorporate the
following additions: Patterned concrete may be used for median cover material.
Construction shall conform to the requirements of CDOT Subsection 608.03 with the
following exceptions:
(a) While the concrete is still plastic, a special pattern forming tool shall be applied to
the concrete surface to form the specified pattern. All tears and voids resulting
from the pattern forming shall be repaired.
(b) Curing shall include application of two coats of colored wax curing membrane.
The first coat shall be applied within 2 hours of finishing. The second coat shall
be applied between 10 and 20 days following the first application.
8-6 DESIGN AND CONSTRUCTION STANDARDS Effective: November I6, 2000
5~
(E) Section 703, Aggregates
Subsection 703.04, "Aggregate for Hot Plant Mix Bituminous Pavement," paragraph 3 is
deleted and replaced with the following revision:
(1) The aggregate from individual sources shall have a percentage of wear of not more than
40 when tested in accordance with AASHTO T96 after 500 revolutions. The aggregate
from individual sources shall contain no more than a 1 percent deleterious material
including clay lumps, vegetable matter, friable particles, and other deleterious substances
tested in accordance with AASHTO T112.
(2) For quarries or sources which contain minerals which are not of similar composition, the
abrasion and friable particle requirements shall be applied to each mineral composition.
(3) All aggregate shall meet the sodium or magnesium sulfate test in accordance with
AASHTO M29.
(F) Section 612, Delineators and Reflectors
Subsection 612.02, "Materials," is amended to incorporate the following additions: All
delineators shall be "sueot safe hit" flexible-,reflective delineators, and shall be anchored
according to manufacturer's recommendations. TV-1 A .B -Q-41e-base shall n-aalledd
(G) Section 614, Traffic Control Devices:
(1) Subsection 614.02, "Sign Posts and Sign Structures," is amended to incorporate the
following additions:
(a) All signs must be mounted on "TELESPAR" t9~ posts or approved equal.,
These installations shall be per manufacturer's rec; ommendatio..lis,-and-h
4nns tvcteci in'twq_seCSiQnS~ inelt~in~ the ~~~nd~l ~pOSt•
(b) The pos size shall confQun to manufacturers recommendations according to the
total sign area square footage and wind loading. but in no instance shall roost size
be less than 2" square. 12 gauge material, affixed to base by means of two (each)
drive rivets with washers on the back side of host and right or left side of post at a
length to accommodate re pamper mounting height of sign to be affixed >~er the
M -TCQI)
(CC) The "TELESPARTels3ar" sign base shall be 2 x 36 inches in length and shall
be driven into the ground 339 to 343 inches with 24 to 36 inches exposed above
final grade.
(d) Sign Bolts• Sign shall be affixed to post with a minimum of two (each) 5/16 x 2-
3a inch bolts with locking nut and vandal r of Gator Lock or roved e ual
hardwar-een each side (frontlback) with nylon washer or equivalent behind the
Gator lock on the sheeting
e) Banded Sign Mount: All banding material shall be inch wide sta mess Steel
banding Hardware fgr installation of signs less than 30"'" Oro es-ar-les&
at clie to a signal/light pole shall consist of a bjjrkle bracket.- For 30"or er a er
signs.^a 36 i^^h°_ or gEtat a sign fix is required to be mounted on the_sign and
Effective: November 16, 2000 DESIGN AND CONSTRUCTION STANDARDS 8-7
Acmda Mat 0 0
a slider bracket to affix sign to the banding.
fl Other Sign Mounts: Utility wood poles can be used when the location is
ppropriate for signs with prior approval frg_m_Ihe Director. The mounting
hardware shall be lag bolts with washers, with nylon washer or equivalent against
the sheeting side.
( Cantilever Mount: Cantilever motints_s__all 1e ~e a roved y the Director
prior to being used
(h) CDOT 13reakawav P st System 1 °d ^ d; « FtHo ra.
^FP^..,d°_.../,°««I ,.,.d :«t1,, gity .^l.t^r . 4- igpSafe-placedw rtkte
e~hein rights-of-way under the jurisdiction of CDOT shall provide a
4ie GDCq breakaway system 6' ^11-° +se in accordance with CDOT standards
se,--M S Standards section S-614-54aEde~
,,.,t size shall ^ ..F FM to ..F..,... ° endatie ns efdin to d total Sign
area Oyu a.. av..
(b) All tra ffi, Signs of sets ^Fsigns with a total . ..F less than « equal to 1
«e feet shall be installed as shown in Teehfiieal Tl«.... ; g 2 .99, the Type TTT
sy .
Ali sign detail n GhaPt°' 11 ..F these Standards. All t«..FFLe sigrrs (of sets a
signs) with a taial surfaee area greater theii 1 ' It square feet shall be insialled as
sliewn en .,1 it«.,...; 18 1 and 1 92 the T....° T and T....° 14 large sign
MAS, in Chapter 11 of these 9ta+1dafdS1
1 All t« ffie signs shall be « eunted ^I feet F H.° t,.« e f I, ufb i, b F
"KEEP 144GHT" P.IS6~"ONE ~-WAY" ~Ji-I1Tmounted
shall w««aat°d at h,.:..Ht ,.F G feet, m F«,,.«, the t..« .,f A.,, euph H
butte 3 of 'he sign.
(ii) "Ark)12ARK G" signs slrall be Enewited at a height ef 6 foR-:7 inehes4e
the W44 m of the s
w.t.....-ov~ap-
(iii) Street name -signs n3e'a;ited by tkemselrnesr vhmall be xr.....roc..m..nb ..d az H
rzr o va R
height as if t4 j by a "STOP" sign,
(2) Subsection 614.04, "Sign Panels," -is amended to incorporate the following additions:
a) All reflective sheeting shall be ASTM D 4956-04 Tvpe XI Diamond Gradc Cubed
DG3 or equivalent approved by the Director.
b) All sign blanks shall be constructed using Q.100 auge aluminum material
A" bask:«^ «1.,«°,...1,,,11 n on muwB „H.,...;«...« :4
(c) All public street name igna shalt be constructed using extruded alumimm~~hy
6063-T6 or approved equal with 0.091 inch thick web 0.250 inch thick edges
and square corners All non-extruded signs shall be mounted on 0 100 gage
aluminum wilhnounded radius comers Allprl lic street name si ms shall be
constructed using reflective sheeting stated above and have a blue background
3ith white lettering
8-8 DESIGN AND CONSTRUCTION STANDARDS Effective: November 16, 2000
gl
+R-4
-(a) All Mefleetiye sheeting "hall be Type A' (Al Seetehl;te 3990 Nqp Diary.end GFad
or approved '
(Seetehl:te E-ag:«ear gT de o •ed e .alen4) Dating stieke«a shall be RA
475 0300 1370 2 ^d ......al
(b) All 9 ;..,.h "tweet name sign" shall be mo rated extfuded al..«.inufn alt,... 063
C°J c -
4:6 a •ed equal, with 004 inch thiek weh 0240 1.,,.h thiek edges a..d
sqtiaize edges. n All ^e^ exti:e °ed shall he ted e^ n 100 gave al
c
(H) Section 627, Pavement Marking
Subsection 627.03, "General," is amended to incorporate the following additions:
(1) All eresswalk lines shall be applied leagiPadinally, atid shall be 24 inehes wide by 10 fi~et
long,
Q--White and yellow skip markings shall be 3-4 inches wide and 10 feet tone with a 30 foot
pan between.
2) All crosswalk lines shall be applied longitudinally, and shall be 24 inches wide by 10 feet
loll
Q)_ On concrete surfaces al] curing; Campo ndshall be removed prior to theinstallatipn.o
p vement tnal:king.
(4) Maintenance Striping
~ All lane, center. and channelizhtg lines shall be strived with enoxv pavement
markings at 15 mm thickness with glass beads.
(b) All crosswalk lines installed on asphalt surfaces shall be provided using pre-
formed plastic pavement markings 3-M A-270 E/S series tape. On concrete
surfaces, an equivalent pre-fonn thermoplastic marking_ can be used if ap_nroved
the Director.
(b) All lane use arrows on concrete surfaces shall be Premark Brand Elongated Series
Contrast Anows.
3302171(len gated affew) 93302 47b
alert n l~ eF a n 1' t d GDOT> d
pFsdupts sat Shall ha e.l
c) All-lane tIse arrows on Asnhalt Surfaces shall be pre-formed plastic pavement
markings. 3M Elongated L270 ES Series
sd) Adherence to manufacturer's installation recommendations (methodl is required
- _ -
iana use n n sphalt Sur f ee shall l.@ pre f~aNa .a aye... e.,t ..,a.d,;....a 3
M (el E)Hgated) a e «a«1 1 PCT is 1 27ORS LE Ae#) ars AC T 7^ln1rC DC
(Fichf) OF SMS 1'170ES SE (at..aight) q e'1 .ale«4
(4) New Striping
a) Approval of final lay-out is required prior to placementQf pavement marking
Effective: November 16, 2000 DESIGN AND CONSTRUCTION STANDARDS 8-9
(b) On concrete surfaces all curing compound shall be real vedgri r o-llie
installation Qf an=ypavement n-
c) Adherence to manufacturer's installation recommendations is required
(AZ._ All lane use arrows on concrete surfaces shall be Premark Brand Elongated Series
Contrast Arrows. .A 11 ln44e o RfFev,s on r,.nsf:L., 4;all he Pre4adE A
oz zn~n~T GONT (Blaev GantYast barde \ of
appFeyed e,,,,:yajont Onlypre F .-med A,e.-..,,,plastie listed en (DDOT's ai~ofe e°a
(e) All lane use arrows on Asphalt Surfaces shall be pre-forned plastic pavement
markinga,_3M Elongated L270 ES Series. A 11 E my 1319 a °e 019-aws an asphalt
ages shall he pre-ided ...;«l, .."O C f ffled "last ....,.,.i,:..,... z TA
(elankxated4 N CneC T 7']nL'C 142, IleFl ,.«Cn eC T 7APS RP I" Qht
nee T ~~noa c° (gt.-,.:ehr) e1 an .,..1.,.,t .,,..-L:ng apex ved by the Direeiar
TF ppef rmed plastic i used, these skip maFkings may be A illehes wide.
(1) Section 713, Traffic Control Materials
(1) Subsection 713.04, "Sign Panel Backgrounds," -is amended to incorporate the
following addition: Aluminum sign panels may also have a Class 11(A-1) anodic coating
clear finish as defined in the -"Aluminum Association Standards for Anodically Coated
Aluminum Alloys for Architectural Applications."
(2) Subsection 713.06, "Messages," -is amended to incorporate the following additions:
(a) All street name signs on non-signalized intersections shall be 9 inches wide with
6-inch, upper-case, series D capital letters, together with 4 -inch, lower-case,
series D letters for the name of the street, and a 3 A-inch, upper-case, series D
capital letter together with 2 IL43-inch, lower- case, series D letters for "Avenue,"
"Street," 3-inch block numbers below the abbreviation of "Ave.," "St.," etc.
The "Ave" etc. and block numbers shall be centered on the sign with a 1--inch
separation between them. When block numbers are not used. "Ave'. "St". "Rd"
etc. shall be 6 inch upper case with 4 A inch lower case letters series D. On
numbered streets, a 6 -inch, series D number shall be used with 4 3/A -inch, lower-
case, series D letters for "th", "st" and "nd" to be held in line with the number that
it follows.
(b) All reflective sheeting for street name sign faces shall be Type XI P (3_M
SeatehlitE'.-- 4999-WP-Diamond Grades Cubc -=a in etg or
approved equal. n4t;;.b sliekews sh-Al not he ,heed e street name signs.
(3) Subsection 713.05, "Glass Beads for Traffic Markings," is amended to incorporate the
Jive A7
,n.~,'I-„
following addition: A 1 ]ass beads shall cox o e .r,T, to GPQ 00o:P Z c~~TeaTt,~-
81 (1990) T. pe T n6fi " fletatien unless eIh,.rwi eifieA by the EgigiOee-be gapplied on
J
Epoxy Pavement Markings Lane Lines at a rate of 15 to 18 pounds per gallon.
(4) Su neclian-7-13 13 "Preformed Plastic Materials," is amended to inc roorate-Ilk
8-10 DESIGN AND CONSTRUCTION STANDARDS Effective: November 16, 2000
A9911ft Mm S'G ~3
following additions:
a Preformed Plastic: material shall be 3M Stamark Series A270 ES for all
transverse & longitudinal lines All lane use symbols shall be 3M Stamark Series
L270 ES n r a Plastie! mr n h 1 and n M• 1
gppfoyed alert n 11 lane uge a mb-Is shalt be 9 ?_~t Se : n 9~n
asi~raved dust.. /:..t ..1..,11 t.,...,.,.A
b) Pr formed Plastic (New Concrete Application "white Qii y" material shall be 3M
Stamark Series A3$gS (contrast) for a111ongitudinal skip lines or
channelizing lines Pr~F^ oa nl nr CeBei.et, A Ppligat on) < whit. 1
ateri l shall be 3 M sla .full-k SeFie.. n 9801 RIS (eeatmst) C « all I,.....:tudinal
skit/ 1:.. e.. .d...„.. el:-,:.... l:..e..T on an ccr'di '<-a,..ler..t-rnacc.....te..: ..1 A L 1,
- - - - --xccvccs-iv-0x8
Pireeefer. E)ftly-nr-efenned ~r'ain-s listed an GPOT' a .1
44 ' elrw-xn4~ -
(5) Subsection 713 14 "Pr formed Thermoplastic Material " is am nded to in oroorate th
following -addikions:
a) Preformed Thermo_p_lastic• Materials shall be alkyd based materials for transverse
& loagitudinallings oranproved equivalent
All materials shall be 90 mm thick with beads Only nrefenned thermonlastic
marking material listed on CDOT's approved products list may be used
(6) Subsection 713.19. Methyl Methacrvlate Pavement Markma "
Methyl Methacrvlate material shall be approved by the Director prior to being used on
transporlation facilities in the public right-of-way.
(4) Subseetion 713.14, "Pavement Marking
ti~svefse and langitudinal lines, of approved eelHal. Ali lane tise s)-Rbels shall be 3M
8t ^,.1. Seri's 6330, o e,1 equal
8.02 Traffic Signals
All traffic signal design and construction shall be performed in accordance with the Section 2-2-11,
"Traffic Engineering," B.R.C. 1981 and these Standards.
8.03 Traffic Signs and StripinglWarkinas
(A) Required
The applicant Fe" eansa .e fie° appFe, al shall be responsible for the installation of all traffic control
devices, street name signs, and pavement markings prior to the-opening or eniMg-Of
~ead~yays
bike Pa nv public transportation facility.
Effective: November 16, 2000 DESIGN AND CONSTRUCTION STANDARDS 8-11
(B) Signing and Striping Plan
A complete signing and striping plan shall be submitted as part of project or development
construction plans, to be approved by the Director prior to installation. The plan shall specify the
1 ca i n vaFKws-types, and combinations of approved signs, pavement markings, and barricades
required for each project or development.
(C) Conformance with MUTCD
All signs, sign materials, and barricade warning lights shall conform to the standards set forth in
the current edition of the "Manual on Uniform Traffic Control Devices (euffefi
editisa), and these Standards.
(D) Materials
The quality of material used in traffic signs, type and quality of all vandal-proof sign hardware,
and quality of all metal square sign posts shall be in conformance with these Standards, subject to
approval by the Director.
(E) Private Street Signs
Private streets shall be signed as such and shall include the message "NO CITY
MAINTENANCE,". and be installed on the same support as the street name sign - Anv
private street name signs should be fabricated and installed according to the specifications for--a
public right-of-way street name sign except that the sign shall helve white lettering on a Breen
background.
8.04 Temporary Traffic Control Plan
A) Required
The Director of Public Works may require a Temporary Traftie Control (TTC) Plan for any work
that imnacts._s_public right-of-way or easeme nt.
B) Intent
The p=ose of this section is to establish standards and methods for handlina traffic to be applied
wh n work or work activity in the public right-of-way or public easements impedes or obstructs
any mode of transportation including but not limited to pedestrian bicycle transit or vehicular
traffic. These standards are intended to ensure safe and effective work recs. and warn, control.
protect and accommodate all modes of transportation
C) Transportation Master Plan
All temporary traffic control plans shall comply with the goals- policies. and standards
adopted in the Transportation Master Plan (TMP)D) Objectives
Primary objectives of a TTC plan areas follows:
11 Prevent accidents and iniurv for both the public and for workers by providing a safe work
area
8-12 DESIGN AND CONSTRUCTION STANDARDS Effective: November 16, 2000
5
(2) Prevent damage to public and private property, including, damage to vehicles and
construction eauipment
(3_)_____Ensure well defined and safe traffic movements through_w_grk areas and temporary traffic
control zones.
4) Efficiently and equitably accommodate pedestrian, bicycle, transit, and vehicular traffic
Support mode prioritization goals established in the TMP.
(65) Provide effective communication with the public. and
76 Ensure confornity with these standards for work zone temporary traffic control
(ED) Certification Requirements
(1) Traffic Control Plans shall be prepared by or under the direct supervision of a person
certified as a Traffic Control SlltZerviS r (TCS) by the American Traffic Safety Services
Association (ATSSA) or with equivalent certification as approved by the Director
(2) Traffic Control Plans shall be implemented under the direct supervision of a TCS
certified traffic Control Technician (TCT)or person with equivalent certification as
912PTPy_d tzy the Director
(F€) Conformance with MUTCD
All traffic control plans, signs, sign materials, barricade warning lights, and other temporw y traffic
control measures shall conform to the "Manual on Uniform Traffic Control Devises" (current
dition) except as specifically amended or supplemented by the provisions of dwaQ Standat•ds
Gil General Requirements
All proposed Traffic Control Plans shall include the following,•
(L) _The location of work
2 A description of ~york to be perforlne
3) A construction schedule identifying duration and extent of impacts
(4) A delineation of the proposed work area including any staging storage and delivery areas
(5) Proposed measures to address impacts to vehicl s bicycles pedestrians multi-use path
facilities transit facilities and persons with disabilities
H6) Non Standard Closures
Traffic control plans which due to their location duration extent hours of oo)emtion or impact
will result in more signitic t impacts to 0 traveling pu tic require a i¢itiona] inforna i n to
demonstrate that imnacts have een avoided minimized and mitigated. The Director may
approve the following Non Standard closures upon fmdin that the applicable criteria have been
met:
(1) Work Hours Plans which propose to close a vehicular travel lane on any weekda prior to
9 a.m or later than 4 p.m., or on any weekend shall demonstrate that such impacts cannot
be reasonably avoided or that the proposed schedule reduces impacts to the public
c mpared to closure during normal work hours
(2) Multiple Vehicle Lanes• Plans which propose to close all or multiple vehicle lanes in a
single direction of travel shall demonstrate that such impacts cannot be reasonably avoided
through alternative scheduling or phasing of work
3) Vehicular Detours Plans which propose to detour traffic to another roadway shall
Effective: November 16, 2000 DESIGN AND CONSTRUCTION STANDARDS 8-13
-C
AgffKb I=
demonstrate that such impacts cannot be reasonably avoided and that impacts to the detour
route have been mitigated to the extent practicable. hupacts to the detour route shall be
evaluated including, without limitation, intersection level of service, traffic speed and
volume in residential neighborhh ds and school zones. and impacts to all modes of
transportation
4) Flagging: Plans which propose use of flaggers shall demonstrate that the duratio_n_ pr
scope of work is such that more pennanent control measures are not practical.
5 'Transit Facilities: Plans which propose impacts to a transit facility or transit sto must
demonstrate that such impacts cannot be avoided and provide for appropriate detours and
alternative stop locations
6) Sidewalks: The following special considerations shall be given to proposed closuies of
sidewalks:
a) Adjacent te~.tj:eeta notclacsified as "Local" in the Transportation Master Plan:
Located in the CAGID or UHGID boundary areas,
C) Impacted for more than seven days,
dl-..-..__Whre no other sidewalk exists adia en o the roadway:
C) Serving a school zone or transit stop. or
D Requiring pedestrians to detour to a facility on a separate parallel roadway Such
proposed closures must demonstrate that impacts cannot be avoided through
alternativestmction methods that the duration and ex temt, impacts has been
minimized. and that_an equate detour has been provided.
(7) Bicycle Lanes, Special consideration shall be given to proposed closures of on street
bike lanes alone roadways with a pasted speed limi_t_of 40m h greater: or bike lanes
-Qr thatim-v-olve contra-flow lanes. Ssrch_proposed closures shall demonstrate that impacts
cannot be avoided through altemative construction methods, that the facility cannot be
reasonably relocated through reassignment of vehicle lanes or other existing facilities that
the duration and extent of i2acts has been minimizgti and that an adequate detour has
beenmrolidesl,
8) Multi-Use Paths: Special consideration shall be given to proposed closures of sidewallc
facilities which have been designated as multi-use paths Such proposals shall
demonstrate that impnIs cannot be avoided fir ugh alternative construction methods. that
the facility cannot be reasonably relocated through reassignment of vehicle lanes or other
existing facilities. that the duration and extent of impacts has been minimized, and that an
adequate detour has been-Provided, Detours routes must be of similar width and surface
type. tQ-thgpermanent facility
(9) Signage• Where detours or closures impact pedestrian bicycle or multi-use path
facilities additional signage specified n Chanter I 1 of these standards shall be utilized to
supplement the ieguirennents_of the MUTCD.
8.045Fire Lane Sign Specifications
(A) Size
Fire lane signs shall be 12 inches by 18 inches.
8-14 DESIGN AND CONSTRUCTION STANDARDS Effective: November 16, 2000
a
(B) Material
Fire lane sign material shall be 0.100-inch thick aluminum alloy 6061-T6 with 3-M S~eate ' to
Diamond Grade Cubed (DG3) sheeting Type XI
b
(C) Colors
Fire lane sign colors shall be red letters on a white background. The letter on the symbol shall be
black.
(D) Wording
Fire lane signs shall including the wordingT "FIRE LANE;" "P4:R- P,'' with an appropriate
arrow _and_ rmieaica no parking symbol ("P" with a slash).
8.056Signing fora#andisappedAccessible Parking
HandieappedAccessible parking signs required for handisappedaccessible parking spaces shall meet the
following standards:
(A) Materials
Sign materials shall conform to the standards set forth in the MUTCD and these Standards.
(B) Required Signs
Twellree signs shall be required for handicappedaccessible parking spaces as follows:
(1) Sign #1: Sign #1 (R7-8) shall be 12 inches by 18 inches with green lettering on a white
background. This sign shall read, "RESERVED PARKING", followed by a blue
handieappedaccessible symbol and a green arrow indicating the stalls restricted to
handieappedacccssible parking.
(2) Sign #2: Sign #2 shall be 244 inches by 13$ inches with white lettering on a blue
background. This sign shall read, "VEHICLES NOT DISPLAYING THE CTS
14n> QIG n PPED n r rTSTATE AUTHORIZATION140 T ,N MAY BE TOWED
AT OWNER'S EXPENSE. FOR PERMIT INFORMATION CONTACT THE LOCAL
MOTOR VEHICLE OFFICE," and shall display a symbol of accessibility.
3) Sign #3: Sign #3 shall be 12 inches by 6 inches with white numerical numberin on a
blue background. This sign shall read in numerical value _"$112.00," _centered with a
white horder.
(C) Sign Placement
The haandisappedaccessible parking signs shall be placed as shown on Technical Drawing 2.86,
"HaRdieappedAccessible Parking Sign Details," in Chapter 11 of these Standards, and are to be set
directly facing or no more than 45 degrees from the line of travel of a vehicle entering the stall.
These signs may be mounted on a post or may be mounted permanently on an adjacent wall using
anchor bolts. Such signs shall be placed at the center of the end stalls of each
handieaffl3eda~~ s i Ic parking area and at every second stall in-between.
Effective: November 16, 2000 DESIGN AND CONSTRUCTION STANDARDS 8--1155
8.07 Signing for Parking Restrictions
A) Size
Parking restriction signs shall be 12"-x 18"
B) Material
Sign material shall be 0.100-inch thick aluminum alloy 6061-T6 with 3M DG3 (Diamond Grade
Cubed) sheeting Tyne XI.
8-16 DESIGN AND CONSTRUCTION STANDARDS Effective: November 16, 2000 n
A" ftm 0
CITY OF BOULDER
DESIGN AND CONSTRUCTION STANDARDS
CHAPTER 11
TECHNICAL DRAWINGS
TABLE OF CONTENTS
Drawing Title Drawing Number/Page
GENERAL DRAWINGS
Drafting Standards ....................................................................................................................................................1.01
TRANSPORTATION DRAWINGS
Curb and Gutter 2.0l.A
Curb and Gutter Joints .......................................................................................................................................2.01-.BA
Iategfal GuFbwal'k _1702
Concrete Walk and Ma .r, r se ns. Join''i. 2.^~ ^
C<-esspaa and Radii Curb Return Aeee,ses 103
Concrete Walk and Multi-Use Paths 2.042.A
Integral Curbwalk ..................................................w_ u~ .a«::_ ? 32B
Concrete Walk and Multi-Use Path Joints . 2 02 C
CsneFete 'V all- : edestrean';3ieyele Trails .lea3=ts ...........................................................................................4.04-A
Multi-Use Path Section Detail .........................................................................................................................2.04-2.DB
............2.03
CrOSSpan and Radii Curb Return Accesses
Flagstone Walk .........................................................................................................................................................2.05
Typical Alley Paving Section 2.06
Attgghed_ i~3~w lk Curb Raines wipes 2.07
Side~ralk Aosess Curb Ramp boeatien.....................................................................................................................2~7
Sidw alk Ar-ee,•r,.-Qeub Ramp Detail Survey Monument Range Box 2.11
Intersection Pin Range Box 2.12
Valve Box Adjustment .............................................................................................................................................2.13
Driveway Ramp, Detached Walk 2.21
Driveway Ramp-faf, Curbwalk=COOT Tvoe 1 2.22.A
Driveway Ramp, Curbwalk - CDOT Tyne 2 . 2.21B
Chase Drain, Curbwalk 2.31
Chase Drain, Detached Sidewalk ..............................................................................................................................2.32 -
Median, Paved Cover ...............................................................................................................................................2.41
Median, Paved Curb Skirt 2.42 A
Median, Brick Curb Skirt 2.42 B
Bicycle Path Cross-Section ......................................................................................................................................2.51
"hrverted _U" Bicycle Racks 2.52A
lnverted "U" Bicycle Racks................................
B
Effmflve: November 16, 2000 DESIGN AND CONSTRUCTION STANDARDS 11-i
AgaWs
Head in Biey ale Parlaing 2.53
I1andisapped-A4cessib_1e Parking Stall .....................................................................................................................2.54
Non-Residential Street Cross-Section Examples 2.61 A
Non-Residential Street Cross-Section Examples 2.61 B
Non-Residential Street Cross-Section Examples 2.61 C
Residential Collector Cross-Section .........................................................................................................................2.63
Residential Street Cross-Section ...............................................................................................................................2.64
Rural Residential Street Cross-Section .....................................................................................................................2.65
Residential Access Street Cross-Section ..................................................................................................................2.66
Residential Access Lane Cross-Section 2.67
Residential Alley Cross-Section ...............................................................................................................................2.68
Portland Cement Concrete Pavement 2.71 A
Portland Cement Concrete Pavement 2.71 B
Portland Cement Concrete Pavement 2.71 C
Portland Cement Concrete Pavement 2.71 D
Straight Retaining Wall Expansion Joint ..................................................................................................................2.72
Type -1 Sign Installation Details ................................................................................................................................2.81
Type 11 Sign D@talls.................................................................................................................................................. o o~
T-5re 411 sign pecans...... _2.83
-Ti-5pe -T -TT--r Sign Detai4s 3.94
install in Qeae-ete," T-5Tes Sign D@tails 2.85
14andieagpedAccessible Parking Sign Details ..........................................................................................................2.86
Street Name Sign Mounting Details 2.87
STREETSCAPE DRAwiNGS
Streetscape Tree Spacing and Location ....................................................................................................................3.01
Trees and Shrubs Planting Detail .............................................................................................................................3.02
Tree Grate for Sidewalk Planting 3.03
Grade Change Around Existing Trees 3.04
Sample Landscape Protection Plan ...........................................................................................................................3.11
Protected Root Zone and Drip Line 3.12
Root Loss from Tunnelling .......................................................................................................................................3.13
Irrigation Pressure Vacuum Breaker 3.21
Irrigation Reduced Pressure Backflow Assembly 3.22
Irrigation Pressure Reducing Valve ..........................................................................................................................3.23
Irrigation Gate Valve ................................................................................................................................................3.24
Irrigation Drain Valve 3.25
Irrigation Quick Coupling Valve 3.26
Irrigation Control Valve 3.27
Irrigation Valve Assembly Spray ..............................................................................................................................3.28
Irrigation Drip Valve ................................................................................................................................................3.29
Irrigation Quick Coupler 3.31
Irrigation Spray Head 3.32
Irrigation Pop-Up Shrub Spray Head .......................................................................................................................3.33
Irrigation Bubbler Detail ..........................................................................................................................................3.34
Irrigation Fixed Head and Riser 3.35
Irrigation Rotary Head 3.36
Irrigation Drip Details .............................................................................__.............................................................3.37
Irrigation Typical Trickle Fittings 3.38
Irrigation Trenching and Pipe Installation., 3.39
Irrigation System Thrust Blocks 3.40
1141 DESIGN AND CONSTRUCTION STANDARDS Effective: November 16, 2000
5C Pap
Irrigation System Controller 3.41
Irrigation System Wire Connection 3.42
UTILrnES DRAWINGS
Utility Trenches, 16" Wide or Less 4.01
Utility Trenches, Wider than 16" ..............................................................................................................................4.02
Pipe Bedding 4.03
Restoration of Asphalt Street Excavations, Streets Less Than 3 Years Old .............................................................4.04
Telecommunications Conduit and Cable Encroachments in Public Right-of-way ....................................................4.05
Concrete Encasement ...............................................................................................................................................4.06
Stream Crossing ........................................................................................................................................................4.07
Groundwater Barrier 4.08
Pipe Casing With Casing Spacers 4.09 A
Pipe Casing With Wood Skids 4.09 B
Water Line Lowering, Utility Line Crossing Only 5.01 A
Water Line Lowering, Culvert Crossing Only 5.01 B
Water Line Lowering, Drainageway Crossing Only 5.01 C
Sewer Crossing 5.02
Tie Rod Specifications 5.03
Tie Rod and Washer Details 5.04
Tie Rod Coupling 5.05
Flange Lug Detail 5.06
Clamp Details for Use with Ductile Iron Pipe Only 5.07
Table of Dimensions for Clamps 5.07 A
Combination Flanged Harness Lug Details 5.08
Mechanical Joint Restraint Details 5.09
Buried Ductile Iron Pipe Joint Restraint for 12" and Smaller Pipe 5.10
Valve Box 5.11
Fire Hydrant Placement ............................................................................................................................................5.12
Fire Hydrant Installation, Types 1, 2, and 3 5.13
Horizontal Thrust Block 5.14
Vertical Thrust Block 5.15
Standard 3/4"- 1" Service 5.16 A
Standard Meter Pit, 3/4" - I" Services 5.16 B
Standard 1 1/2" - 2" Service 5.17 A
Standard Meter Setting, 1 1/2" - 2" Services 5.17 B
Standard 11/2" - 2" Meter Setting 5.17 C
Standard 1 1/2" - 2" Irrigation Service 5.17 D
Standard 3" and 4" Service 5.18 A
Standard Meter Pit, 3"and 4" Services 5.18 B
Standard 3" and 4" Meter Setting 5.18 C
Meter Pit Depth Adjustment, 3" and 4" Service 5.18 D
Combination 3/4" Domestic/Fire Sprinkler Meter Setting .......................................................................................5.19
Combination 1" Domestic/Fire Sprinkler Meter Setting 5.20
Valve Box, 1 1/2" - 2" Fire Sprinkler Line 5.21
Standard Combination Air Valve Manhole 5.22
Standard Sewer Manhole 6.01
Standard Drop Sewer Manhole 6.02
Manhole Invert .........................................................................................................................................................6.03
Standard Manhole, Bolt-Down, Water-Tight, Frame and Cover 6.04
Effective: November 16, 2000 DESIGN AND CONSTRUCTION STANDARDS 11-iii
Apwda
- 5
Extruded Aluminum Manhole Step 6.05 A
Polypropylene Reinforced Plastic Manhole Step 6.05 B
Sewer Service Line ...................................................................................................................................................6.06
Storm Sewer Manhole 7.01
Storm Sewer Manhole Base ......................................................................................................................................7.02
Flat Top for Shallow Manholes Less Than 6' in Height 7.03
Single No. 16 Open Throat Inlet, Adjustable Curb Box 7.04 A
Single No. 16 Open Throat Inlet, Adjustable Curb Box 7.04 B
Double No. 16 Open Throat Inlet, Adjustable Curb Box 7.05 A
Double No. 16 Open Throat Inlet, Adjustable Curb Box 7.05 B
Triple No. 16 Open Throat Inlet, Adjustable Curb Box 7.06 A
Triple No. 16 Open Throat Inlet, Adjustable Curb Box 7.06 B
No. 16 Grate and Frame, Adjustable Curb Box ........................................................................................................7.07
Type "R" Curb Inlet 7.08 A
Type "R" Curb Inlet 7.08 B
Type "R" Curb Inlet 7.08 C
Type "R" Curb Inlet 7.08 D
EROSION AND SEDMENT CONTROL
Gravel Curb Inlet Filter 7.20
Gravel Drop Inlet Filter ............................................................................................................................................7.21
Block and Gravel Drop Inlet Filter 7.22
Straw Bale Sediment Control at Catch Basins 7.23
Straw Bale Check Dams ...........................................................................................................................................7.24
Straw Bale Installation 7.25
Prefabricated Silt Fence Installation .........................................................................................................................7.26
Orientation of Netting and Matting 7.27
Installation of Netting and Matting 7.28
Sediment Trap 7.29
Temporary Gravel Construction Entrance 7.30
11-iv DESIGN AND CONSTRUCTION STANDARDS Effective: November 16, 2000
Agods em w P
CITY OF BOULDER
DESIGN AND CONSTRUCTION STANDARDS
GLOSSARY
SECTION 1: ABBREVIATIONS
Wherever the following abbreviations are used in these Design and Construction Standards (Standards), or
in association with these Standards, the intent and meaning shall be as follows:
AAN American Association of Nursery- AWG American Wire Gauge
men AWPA American Wood Preservers
AAR Association of American Railroads Association
AASHTO American Association of State AWS American Welding Society
Highway and Transportation AWWA American Water Works
Officials Association
ABC Aggregate Base Course
AC Asphaltic Cement
ACI American Concrete Institute BFD Boulder Fire Department
ADT Average Daily Trips BMP Best Management Practices
AGCA Associated General Contractors of BRC Boulder Revised Code, 1981
America
Al Asphalt Institute CCA Colorado Contractors Association
AIA American Institute of Architects CDOT Colorado Di isieneparuuent of
AISC American Institute of Steel Transportation
Construction CFR Code of Federal Regulations
AISI American Iron and Steel Institute CFS Cubic Feet gP-er Second
AITC American Institute of Timber CLOMA Conditional Letter of Map
Construction Amendment
ANSI American National Standards CLOMR Conditional Letter of Map Revision
Institute, Inc. CMP Corrugated Metal Pipe
APWA American Public Works CP Colorado Procedure
Association CPUC Colorado Public Utilities
ARA American Railway Association Commission
AREA American Railway Engineering CRS Colorado Revised Statutes, 1973,
Association as amended
ARTBX American Road and Transportation CRSI Concrete Reinforcing Steel Institute
Builders Association CUHP Colorado Urban Hydrograph
ASCE American Society of Civil Procedure
Engineers
ASLA American Society of Landscape
Architects DHV Design Hour Volume
ASME American Society of Mechanical DIP Ductile Iron Pipe
Engineers DRCOG Denver Regional Council of
ASTM American Society for Testing and Governments
Materials DWG Drawing
ATSSA American Traffic Safety Services
Association EDLA Equivalent Daily Load Applications
Effective: July 2, 1998 DESIGN AND CONSTRUCTION STANDARDS G-i
AgIrWa Pap
EIA Electronic Industries Association
EPA Environmental Protection Agency
FEMA Federal Emergency Management Technology
Agency NOAA National Oceanic and Atmospheric
FHWA Federal Highway Administration Administration
FL Flowline NPK Nitrogen-Phosphorus-Potassium
FPS Feet Per Second NSF National Sanitation Foundation
FSS Federal Specifications and
Standards OSHA Occupational Safety and Health
Administration
GIDM Gallons Per Inch Diameter Per Mile
GPAD Gallons Per Acre Per Day PC Point of Curve
GPCD Gallons Per Capita Per Day PCC Portland Cement Concrete or Point
GPM Gallons Per Minute of Compound Curve
PLS Pure Live Seed
HCM Highway Capacity Manual PMR Physical Map Revision
HBP Hot Bituminous Pavement PRC Point of Reverse Curve
PRV Pressure Reducing Valve
ICBO International Conference of PT Point of Tangent
Building Officials
IEEE Institute of Electrical and RCP Reinforced Concrete Pipe
Electronics Engineers ROW Right of Way
TES Illuminating Engineering Society
IMSA International Municipal Signal SAE Society of Automotive Engineers
Association SEO State Engineer's Office
IPCEA Insulated Power Cable Engineers SHAC State Highway Access Code
Association
ISO Insurance Service Office TC Top of Curb
ITE Institute of Transportation TIA Telecommunications Institute of
Engineers America
TMP Transportation Master Plan, City of
LOMA Letter of Map Amendment Boulder
LOMR Letter of Map Revision
LOS Level of Service UBC Uniform Building Code
UDFCD Urban Drainage and Flood Control
MIL Military Specifications District
MPH Miles Per Hour UFC Uniform Fire Code
MUP Master Utility Plan UL Underwriters Laboratories, Inc.
MUTCD Manual on Uniform Traffic Control UMC Uniform Mechanical Code
Devices UPC Uniform Plumbing Code
USDCM Urban Storm Drainage Criteria
NCAR - National Center for Atmospheric Manual
Research USGS United States Geological Survey
NEC National Electrical Code
NEMA National Electrical Manufacturers VPC Vertical Point of Curve
Association VPI Vertical Point of Intersection
NESC National Electrical Safety Code VPT Vertical Point of Tangent
NFPA National Fire Protection
Association
NIST National Institute of Standards and
G-ii DESIGN AND CONSTRUCTION STANDARDS Effective: July 2, 1998
t pap.
SECTION 2: DEFINITIONS
Words and phrases contained in these Standards shall be read in context and construed according to the
rules of grammar and common usage. Words and phrases that have acquired a technical or particular
meaning, whether by definition, adoption herein, or otherwise, are intended to be construed accordingly.
Wherever the phrases "as directed", "as required", "as permitted", or phrases of like meaning are
used, it shall be understood that the direction, requirements or permission of the Director of Public Works
(Director) is intended. Similarly, use of the words "approved", "acceptable", and "satisfactory" shall
refer to approval of the Director.
The definitions in this Glossary apply throughout these Standards. The words or phrases presented have
the following meaning unless the context clearly indicates otherwise:
"Alteration" means a request to use a substitute or alternative material, method, or process which will
perform the same function as that provided in a particular standard.
"Approach" means the portion of an intersection leg which is used by traffic approaching the intersection.
"Approved plan" means the engineering design and construction drawings for public improvements,
prepared by an engineer, which has been granted final approval by the Director of Public Works in
accordance with these standards.
"As-built" means an engineering drawing of record, prepared under the direction of a licensed Colorado
registered professional engineer, reflecting the actual construction of public improvements in the service
area, including, but not limited to, final grading, alignments, dimensioning, elevations, locations and
materials sizing and type.
"Average Daily Trips (ADT)" means the volume of traffic passing through a given point during a given
time period, divided by the number of days in that time period.
"Backflow" means the reversal of the direction of flow of water or mixtures of water and other liquid,
gases, or other substances into the distribution pipes of a potable water supply from any source or sources
caused by backpressure and/or back-siphonage.
"Backtlow prevention assembly" means any approved assembly, method, or type of construction
designed to prevent backflow or back-siphonage into a public water supply by isolating the owner's water
system from the public water system. In addition, see Section I. of these rules.
"Caliper" means a diameter measurement of a tree's trunk, and is measured around the trunk of the tree,
six- inches above tree base grade for one to four inch caliper trees and 12 inches above tree base grade for
five to eight inch caliper trees. Trees measuring between four and five inch caliper shall be rounded off to
the nearest inch.
"Capacity" means the maximum number of vehicles that have a reasonable expectation of passing over a
Effective: July 2, 1998 DESIGN AND CONSTRUCTION STANDARDS G-iii
5~P9
Agenda liew
given roadway or section of roadway in one direction during a given time period.
"Certified Backilow Prevention Device Tester" means any person who has passed a State of Colorado
approved or sponsored certification examination, and who is listed as a certified backflow prevention
device tester with the Colorado Department of Public Health and Environment.
"City" means the City of Boulder, a Colorado home rule city in Boulder County, Colorado.
"City water system" means the source and distribution facilities of the water system to the point of
delivery to the owner water system. The source includes all components of the facilities utilized in the
production, treatment, storage, and delivery of water to the distribution system. The distribution system
includes the network of conduits used for the delivery of water from the source to the owner water system.
"Contractor" means a person, firm, partnership, subcontractor or corporation, licensed by the City that is
responsible for the construction of approved public improvements associated with a specific project, or
projects, within the City of Boulder service area. This term also includes the contractor='s superintendent
and on-site manager.
"Colorado Cross Connection Control Manual" means a manual published by the Colorado Department
of Public Health and the Environment addressing cross connection control practices, Fourth Edition -
Revised.
"Cross connection" means any physical arrangement whereby the city's water supply system is
connected, directly or indirectly, with any other water supply system, sewer, drain, conduit, pool, storage
reservoir, plumbing fixture, or other device which contains, or may contain, contaminated water, sewage,
or other waste or liquid of unknown or unsafe quality which may be capable of imparting contamination to
the public water supply as a result of backflow. Bypass arrangements, jumper connections, removable
sections, swivel or changeover assemblies, and other temporary or permanent assemblies through which, or
because of which, backflow could occur are considered to be cross connections.
"Delay" means the stopped time per approach vehicle, in seconds per vehicle.
"Design Hour Volume" means the hourly traffic volume used for street design and capacity analysis,
usually one (1) or more peak hours during a 24 hour period.
"Design Speed" means five (5) to 10 miles per hour above the proposed or desired speed limit of the
facility under design.
"Design Vehicle" means that all public and private streets must be designed to accommodate an SU-30
vehicle. The definition of this vehicle type is found in AASHTO's Geometric Highway Design Standards.
"Developer" means the person, owner, firm, or corporation responsible for the development and
completion of all public improvements associated with a proposed project in accordance with these
standards.
"Diameter" means the diameter size measurement of a tree's trunk, and is measured around the trunk at
4.5 feet above the tree base grade for trees greater than eight (8) inch caliper.
G-iv DESIGN AND CONSTRUCTION STANDARDS Effective: July 2, 1998
6 pop 0
"Director of Public Works" means the authorized City employee, or his/her designee, responsible for the
enforcement of these standards and approval of the design and construction of public improvements within
the City of Boulder service area, and the overall management and direction-of the Public Works
Department.
"Dripline" means the outermost edge of a tree's canopy, projected on the ground.
"Engineer" means the Colorado registered professional engineer responsible for the design of all public
improvements submitted to the City for a proposed project in accordance with these standards, including
all plans, calculations, specifications, and coordination of field surveys.
"Construction plan" means the engineering design and construction drawings for public improvements,
prepared by an Engineer which has been submitted for final approval by the Director of Public Works in
accordance with these standards.
"Hourly Volume" means the number of vehicles that pass over a given section of a lane or roadway
during one hour.
"Inspector" means the Director of Public Works, or his/her designee, responsible for the inspection of
public improvements construction.
"Level of Service (LOS)" refers to the definitions of LOS provided in the Highway Capacity Manual,
"Definitions and Concepts."
"May" -means is authorized to, or a permissive condition which indicates a choice between two (2) or
more alternatives.
"Modification" means a request to change or modify a standard or the parameters of a standard because
the particular application may not require the degree of rigor which the standard requires.
"Peak Hour" means the concept referring to the hour of a day when the highest volume of traffic occurs
on a transportation facility.
"Planting Strip" means the landscape area within a street median, the landscape planting strip between
the curb and detached sidewalk, or the landscape area between the back edge of a public sidewalk
(attached or detached) and the right-of-way/property line.
"Public improvements" means any public facility, system or infrastructure in the City of Boulder service
area including, but not limited to: earthwork or landscaping, streets, sidewalks, bike paths, trails, parking
and traffic control devices; water supply, treatment, storage and distribution systems; wastewater
collection and treatment systems; and stormwater and flood control collection and conveyance systems in
public casements or right-of-way.
"Public Sign" means any sign that is posted by a governmental entity within the right-of-way for the
purpose of directing traffic or parking.
"Record Set" means the engineering design and construction drawings for public improvements, sealed
and signed by an engineer, approved by the Director of Public Works in accordance with these standards,
Effective: July 2, 1998 DESIGN AND CONSTRUCTION STANDARDS G-v
~V _e
and maintained on file in public records as the final approved construction document.
"Root Protection Zone" means the ground area surrounding the entire tree that extends from trunk to
dripline, or a minimum of fifteen feet for column-shaped trees, whichever is greater.
"Shall" means a mandatory duty to conform to the specified standard. Where certain requirements in
these standards are described with the "shall" stipulation, it is mandatory that these requirements be met or
exceeded.
"Should" means an advisory condition. Where "should" is used, it is considered to be recommended or
advisory, but not mandatory.
"Sidewalk, Attached" means a sidewalk and curb that are attached as one'(1) continuous element.
"Sidewalk, Detached" means a sidewalk that is separated from the curb by a landscape planting strip.
"Sight Distance" means the length of roadway ahead visible to the driver. The minimum sight distance
available must be long enough to enable a vehicle traveling at or near the design speed to stop before
reaching a stationary object in its path.
"Speed Change Lane" means a separate lane for the purpose of enabling a vehicle entering or leaving a
roadway to increase (acceleration lane) or decrease (deceleration lane) its speed to a rate at which it can
more safely merge or diverge with through traffic. Includes tapered areas.
"Standards" means the "Design and Construction Standards" manual for the City of Boulder.
"Storage Lane" means additional length added to a deceleration lane, to store the maximum number of
vehicles likely to accumulate during a critical period without interfering with the through lanes.
"Street Tree" means any tree in the public right-of-way.
"Streetscape" means landscaping design for any streetside area, generally including but not limited to
planting strips and medians.
"TransnortaHon Demand Management" means any action or set of actions aimed at reducing
the impact of traffic by influencing people's travel behavior.
"Trips" means a vehicle moving from an origin point to a destination point. Trips are one-way.
"Waiver" means a request to delete or omit the application of a particular standard.
"Work" means any activity involved in the performance of constructing, installing, repairing or
maintaining public improvements.
G-vi DESIGN AND CONSTRUCTION STANDARDS Effective: July 2, 1998
ATTACHMENT D
2'
6.
4 1/
/-2' R I 1J4.. R /_2 R
6 6
1 112° R /FT. 1 1/2" R 1 2" Ft
i i
de
N.) 6 ' 8 se.
_n° - .e ^ * (MIN.)
JIM,,
STANDARD 6" OUTFALL/MEDIAN
M BAR CONTINUOUS
'T'HROUGH CURB 1 1/2" R LIMITS OF C & G
1/4" R
14" 17"
/ t I 1 12`
Mltd COVER
3 3/8"
8" EXISTING
#6 REBAR DRIVEN SURFACE ~ FLOWLINE I . '
(OR DRILLED AND
EPOXIED) INTO ° " 4 6"
EXISTING SURFACE . a (MIN.) • e a . ° ¢
(ASPHALT/CONCRETE) 1 3/8" 6."
AT 4' SPACING
6.. 31„
(MIN.) MOUNTABLE CURB
DOWELLED BARRIER CURB
(NOTE: FOR USE ONLY IN
DETACHED SINGLE-FAMILY
NOTES: RESIDENTIAL STREETS)
1. ALL EXPOSED CONCRETE SHALL HAVE A BROOM FINISH.
2. EXPANSION JOINTS SHALL BE INSTALLED AT 500 FOOT MAXIMUM INTERVALS SEE
EXPANSION JOINT DETAIL
3. CONTRACTION JOINTS SHALL BE INSTALLED AT END OF CURB RETURNS AND AT
10 FOOT MAXIMUM INTERVALS - SEE CURB CONTRACTION JOINT DETAIL
4. WHEN JOINING EXISTING CURB, PROVIDE A MINIMUM OF THREE #4 x 18" DOWELS
(9" EMBEDMENT) EVENLY SPACED.
• 5. WHEN PLACING CURB ADJACENT TO CONCRETE PAVEMENT, THICKEN GUTTER TO
MATCH PAVEMENT DEPTH.
DRAM BY. -JSH gym: JULY 2. 1998
cHEcKEDBY: RJH CITY OF BOULDER, COLORADO REmsED- MAY 15, 2009
APPROVED BY:
CURB AND GUTTER DRAWING NO.
DIRECTOR OF PUBUC WOWS ^ O 1 A
0 0_1 to
2'
6"
4 1/2" 4
1/4 R j-2" R 1/4 R /--2" R
6" I 4 1/2"
61/2"
1 1 /2" R F F 1 1/2" R 2"
f
6~.•< ' (MIN.) 6(MIN.)
a
G
STANDA 6" OU LL MEDIAN
M BAR CONTINUOUS
THROUGH CURB 1 1 R LIMITS OF C& G
1/4" R
2 % 14„ 17„
1 1 2'
U COVER
rn:
a, 3 A
$ ISTIN
#6 REBAR DRIVEN a' F FLOWLINE e '
(OR DRILLED AND rn:
EPOXIED) 1' INTO
EXISTING SURFACE d
d 6..
(ASPHALT/CONCRETE). a 1 3/$1
AT 4' SPACING
6.. 31
(MIN.) MOUNTABLE CURB
DOWELLED BARR CURB
(NOTE: FOR USE ONLY IN
DETACHED SINGLE-FAMILY
NOTES: RESIDENTIAL STREETS)
1. ALL EXPOSED CONC SHALL HAVE A BROOM FINISH.
2. EXPANSION JOINT ALL BE INSTALLED AT 500 FOOT MAXIMUM I RVALS SEE
EXPANSION JOIN TAIL.
3. CONTRACTION TS SHALL BE INSTALLED AT END OF CURB RETURN ND AT
10 FOOT MA M INTERVALS - SEE CURB CONTRACTION JOINT DETAIL.
4. WHEN JOI EXISTING CURB, PROVIDE A MINIMUM OF THREE #4 x 18" D LS
(9" EM ENT) EVENLY SPACED.
5. WHE ACING CURB ADJACENT TO CONCRETE PAVEMENT, THICKEN GUTTER
MAT AVEMENT DEPTH_
BRnwH sY JSH 'SSUED: Y 2, 1998
CHECK RJH CITY OF BOULDER, COLORADO REWSEO:O 17, 2000
VEO BY.
CURB AND GUTTER DRAWNGN
TOR OF PUBUC WORKS
2.01
o
GROOVE JOINT
1 1/2"
USE 1/4" MAX \
TEMPLATE
°
1/4„ R 1 1/2,r.. / \ o4a
TYP DEPTHL - . o
e '
~ •v
d
L ° O .a
CURB CONTRACTION JOINT
FILL WITH \
SILICONE SEALANT
SEALANT SHALL BE
ON CDOT APPROVED 3/4" WIDTH
LIST OF SILICONE o
SEALANTS
a'I I 1/4" DEPTH
° 1/4" DEPTH c •p
a. ..dq a do
°
PREFORMED JOINT MATERIAL
d
3/4" PRE-MOLDED, NON-EXTRUDING AND
RESILIENT TYPE EXPANSION JOINT MATERIAL
TO MEET ASTM SPECS D-1751 OR D-1752
CURB EXPANSION JOINT ISSUE~ JULY 2, 1998
CHECKED ECBY: BY. JSH WGH CITY OF BOULDER, COLORADO REvm: MAY 15, 2009 APPROVED BY: CURB AND CUTTER DRAWING NO.
DiREcmR OF PDBUC WORKS JOINTS 2.01. 13
GROOVE JOINT
1 1/2"
E 1/4" MAX
LATE /
\
d a
1/4" R 1 1/2"
TY? DEPTH,.. c
°
9 O
° •o
a
'4
o •e•
B CONTRAC JOINT
FILL WITH \
SILICONE SEALANT
SEALANT SHALL BE \
ON CDOT APPROVED 3/4" WIDT
LIST OF SILICONE
SEALANTS I I \
1/4" DEPTH a
1/4" DEPTH
p • 'o '
°
PREFORMED JOINT MATERIAL
3/4" PRE-MOLDED, NON-EXTRUDIN D
RESILIENT TYPE EXPANSION JOINT MA IAL
TO MEET ASTM SPECS D-1751 OR D-
CURB EXPANSION JOINT
ISSUE[: :X2,, 1998
CHECKED BY. H WGH CITY OF BOULDER, COLORADO HEMSM O2000
CHECK
-
AP BY. CURB AND GUTTER DRAWING N
R OF PUBLIC %'MKS J01 N TS 2.01.
&S _
AwNbowti!
NOTES:
1. ALL EXPOSED CONCRETE SHALL HAVE A BROOM FINISH.
2. EXPANSION JOINTS SHALL BE INSTALLED AT 500 FOOT MAXIMUM INTERVALS AND
AT FIXED STRUCTURES (INLETS, BUILDINGS). SEE CONCRETE WALK AND MULTI-USE
PATH JOINT DETAILS.
1 CONTRACTION JOINTS SHALL BE INSTALLED AT 5 FOOT INTERVALS OR INTERVALS
EQUAL TO SIDEWALK WIDTH. SEE CONCRETE WALK AND MUILT-USE PATH
JOINT DETAILS.
4. IF SIDEWALK IS PLACED ADJACENT TO CURB AND GUTTER, CONTRACTION JOINTS
SHALL LINE UP WITH CURB AND GUTTER JOINTS.
5. LONGITUDINAL JOINTS ARE NOT ALLOWED IN CONCRETE WALK OR MULTI-USE PATH.
CONTRACTION JOINTS
~p1d YwjJ•) 6" RESIDENTAIL
(4 8" COMMERCIAL &
PUBLIC ALLEYS
COMPACTED SUBGRADE
DRAWN BN. JSH CITY OF BOULDER, COLORADO tss,m- JULY 2, 1998
REWSED: MAY 15, 2009
QIECRm BY, WOH
APPROVED BY: CONCRETE WALK AND DRAMING NO.
DIREUMR OF PMC WORKS MULTI-USE PATHS 2.02.A
NOTES:
1. ALL EXPOSED CONCRETE SHALL HAVE A BROOM FINISH.
EXPANSION JOINTS SHALL BE INSTALLED AT 500 FOOT MAXIMUM INTERVA D
AT FIXED STRUCTURES (INLETS, BUILDINGS). SEE CONCRETE WALK AN TI-USE
TH JOINT DETAILS.
3. C ACTION JOINTS SHALL BE INSTALLED AT 5 FOOT INTERVAL INTERVALS
EQ TO SIDEWALK WIDTH. SEE CONCRETE WALK AND MUILT PATH
JOIN TAILS.
4. IF SIDEW IS PLACED ADJACENT TO CURB AND CUTTE TRACTION JOINTS
SHALL LIN WITH CURB AND GUTTER JOINTS.
5. LONGITUDINAL TS ARE NOT ALLOWED IN CONCR ALK OR MULTf-USE PATH.
CONTRAC11ON JOINTS
6" RESIDENTAIL
4 8" COMMERCIAL &
PUBLIC ALLEYS
•.ti ~Fr.
k
COMPACTED SUBGRADE
CITY OF BOULDER, COLORADO ME0 \J2,.1998
ortavm er. JSH
CHEdC WGH rsEHSEO: 2000
By, CONCRETE- WALK AND DRAWING NO.
OF PU`WWKS MULTI-USE PATHS
2.04
- l~9Ul SY~ Y SY
4' MIN 2'
6"
TOOLED JOINTS 1 1/2" R
~ 4 S 2"
2% MAX 2" R I`
Tra
6 r 4 a a .G .G °
4
ESN a -
- 3'-11., S.. MIN
.i
4
LIMITS OF C & G
14° 17"
3 3 8., \ 7/8„
FLOW 4 • '
LINE . • d. a .a
6" i a .T..
13/8•---,s° MOUNTABLE CURBWALK
(NOTE: FOR USE ONLY IN DETACHED
SINGLE-FAMILY RESIDENTIAL STREETS)
NOTES:
1. ALL EXPOSED CONCRETE SHALL HAVE A BROOM FINISH.
2. EXPANSION JOINTS SHALL BE INSTALLED AT 500 FOOT MAXIMUM INTERVALS,
SEE CURB EXPANSION JOINT DETAIL.
3. CONTRACTION JOINTS SHALL BE INSTALLED AT END OF CURB RETURNS AND
AT 10 FOOT MAXIMUM INTERVALS - SEE CURB CONTRACTION JOINT DETAIL.
4. WHEN JOINING EXISTING CURB, PROVIDE A MINIMUM OF THREE #4 x 16" DOWELS
(9" EMBEDMENT) EVENLY SPACED.
* 5. WHEN PLACING CURB ADJACENT TO CONCRETE PAVEMENT,
THICKEN GUTTER TO MATCH PAVEMENT DEPTH.
DRAWN Br. JSH RssuED: JULY 2, 1998
CHEqKED By, WGH CITY OF BOULDER, COLORADO RENSED-. MAY 15, 2009
APPROVED BY.
DIRECTOR OF PUBM WORKS INTEGRAL C U R B 1/VA L K DRAWING NO.
2.02.B
ACEM km i~ sL :t s
4' MIN 2'
6"
1 R
TOOLED JOINTS ~ 4 1/2" 1/2"
MIN 2" R
„
d d !1 . C1 ..Q .Q -
a 6„
.,1N
t e.
3'-11„ o 6,. MIN
e
b 4,1 A
. a.
a.
LIMITS OF G
14"
33 8' 3
y, Aa,
LO,
A.,• _
13/e•~----1'e1• 181, MOUNTABLE CURBWALK
(NOTE: FOR USE ONLY IN DETACHED
SINGLE-FAMILY RESIDENTIAL STREETS)
NOTES:
1. ALL EXPOSED CONCR HALL HAVE A B M FINISH.
2. EXPANSION JOINTS LL BE INSTALLED AT 5 FOOT MAXIMUM INTERVALS,
SEE CURB EXPAN JOINT DETAIL.
3. CONTRACTION TS SHALL BE INSTALLED AT EN F CURB RETURNS AND
AT 10 FOOT IMUM INTERVALS - SEE CURB CON CTION JOINT DETAIL.
4. WHEN J01 EXISTING CURB, PROVIDE A MINIMUM OF EE #4 x 16" DOWELS
(9" EMB ENT) EVENLY SPACED.
* 5.WHE ACING CURB ADJACENT TO CONCRETE PAVEMENT,
THI GUTTER TO MATCH PAVEMENT DEPTH.
DRAWN BY. ssu JULY 2, 1998
CHECKED BY• H CITY OF BOULDER, COLORADO REVISED. T. 17, 2000
APP
DR PUBUC WORKS INTEGRAL CURBWALK °R""""
OF -
2.0
WUSE ALK &4nCURSWALK WIDTH ON
ONLY, ALL Pp~
MULTI-USE PATH CONTRACTION
JOINTS SHALL BE SAWCUT.
,
,
1/4"R 1 1%2" /
TYP D DEPTH /
o_.
Pp ply
Io
FILL NTH
SILICONE SEALANT
SEALANT SHALL BE
ON CDOT APPROVED
LIST OF SILICONE
SEALANTS
3 4" '
1/4" DEPTH i
-0 1/4" DEPTH
PREFORMED JOINT MATERIAL
3/4" PRE-MOLDED, NON-EXTRUDING AND
RESILIENT TYPE EXPANSION JOINT MATERIAL
TO MEET ASTM SPECS 0-1751 OR D-1752
JULY 2, 1998
cwaaxECKm BY. By. JSH WGH CITY OF BOULDER, COLORADO mmsseo- MAY 15, 2009
,PMG%WUY. CONCRETE WALK AND DRAWING NO.
DIMCMR OF"" WIMS
MULTI-USE PATH JOINTS '2.02.C
Aclor-la Ulm
E 1/4" (MAX.) TEMPLATE ON p(kj
W)W & CURBWALK ONLY. ALLP
MU USE PATH CONTRACTION pLK
JOIN HALL BE SAWCUT.
1/4"R 1 1/2" i
TYP D EPTH /
NTRACTION JO
MGR
FILL WITH
SILICONE SEALANT.
SEALANT SHALL BE
ON CDOT APPROVED i
LIST OF SILICONE
SEALANTS
3 4"
_ 1/4" DEPTH ,
1/4" DEPTH
O'
PREFORMED JOINT MATERIAL
3/4" PRE-MOLDED, NON-EXTRUDING AND
RESILIENT TYPE EXPANSION JOINT MATERIAL
TO MEET ASTM SPECS D-1751 OR D-1752
EXPANSION JOINT
DRAM Br- JSH ISSUED: AT,
cRECK WGH CITY OF BOULDER, COLORADO REYSED A BY.. CONCRETE- WALK AND DRAWING NO.
R OF PUBLIC WORKS MULTI-USE PATH JOINTS 2.0 2 . A
r b9
kw&ow
6" THICK MINIMUM CONCRETE.
APPLY BROOM FINISH PERPENDICULAR
TO PATH. SAWCUT 1/4" JOINTS
°aw 1 1/2" DEEP MINIMUM EVERY 10'
ao P z ALONG TRAIL. NO TOOLED JOINTS
Z W ALLOWED ON MULTI-USE PATH.
F > W
z Z J
<_0
2' MIN rl0' MIN 2' MIN
3 3 2% 2% MAX
//\\\i\~~ MAX
DRAINAGE SWALE
WHERE NECESSARY
BACKFILL EDGE
WITH TOPSOIL. FINISH
GRADE TO BE FLUSH
WITH PATH EDGE (TYP)
AND RESTORE TO
PRE-EXISTING LANDSCAPING
PREPARED SUBGRADE:
COMPACT ROADBASE OR USE ON-SITE GRAVEL MATERIAL
WHERE APPROVED BY ENGINEER. OVER EXCAVATE IF UNSTABLE
SUB SOILS ARE ENCOUNTERED AND REPLACE WITH SUITABLE FILL
MATERIAL. COMPACT ALL FILL AREAS TO 95% STANDARD
PROCTOR AT 2% OPTIMUM. REMOVE ALL TOPSOIL PRIOR TO
SUBGRADE PREPARATION.
DRAW BY. JSH
CITY OF BOULDER, COLORADO wum, JULY 2, 1998
aiwa:o ay. RJH Remo, MAY 15, 2009
APPROVED B MULTI -USE PATH ORAW,NG NO.
Y:
SECTION DETAIL
2.02.D
Ac'mft sOpO.
6" THICK MINIMUM CONCRE
APPLY BROOM FINISH PERP CULAR
TO PATH. SAWCUT 1/4" TS
f° ¢ w 1 1/2" DEEP MINIMUM Y 10'
eoFz ALONG TRAIL. NO T JOINTS
Z W < ALLOWED ON MULTI PATH.
w
Z Z J
Q U
\3' 2' MIN 10' MIN 2' MIN
3 27 27
3
KIN .11
MAX
DRAINAGE SWALE
WHERE NECESSARY
BACKFILL EDGE
WITH TOPSOIL. FINISH
GRADE TO BE FLUSH
WITH PATH EDGE (TYP)
AND RESTORE TO
PRE-EXISTING LANDSCAPING
PREPARED SUBGRADE:
COMPACT ROADBASE 0 E ON-SITE GRAVEL MATERIAL
WHERE APPROVED BY INEER. OVER EXCAVATE IF UNST E
SUB SOILS ARE ENC ERED AND REPLACE WITH SUITABL LL
MATERIAL. COMPAC FILL AREAS TO 95% STANDARD
PROCTOR AT 27 MUM. REMOVE ALL TOPSOIL PRIOR TO
SUBGRADE PREP ON.
oRawn BY., J
CITY OF BOULDER, COLORADO \REMICT. Y 2, 1998
CHECKED er. 17, 2000
APPRO,W MULTI-USE PATH DRAMN
olm" SECTION DETAIL 2.0
A
FILL WITH SILICON SEALANT
SEALANT SHALL BE ON
CDOT APPROVED LIST OF
SILICON SEALANTS
3/4" PRE-MOLDED, NON-EXTRUDI D
RESILIENT TYPE EXPANSION JOIN 7ERIAL
TO MEET ASTM SPECS D-1751 -1752
r'
f
EXPANSION J01
USE 1/4" AX TEMPL
a
1/4"R -
TYP
' DEPTH .
. 4
L •a
CO ACTION JOINT
DRAWN 9Y: SH CITY OF BOULDER, COLORADO 's%&-O~ JULY 1998
CHE WGH CONCRETE WALK AND REm7D: OCT. 1 ODO
VED BY.
PEDESTRIAN /BICYCLE DRAWING NO.
TOR OF PMG WORKS
TRAILS JOINTS 2.04.A
ROW INSPECTOR APPROVAL REQUIRED PRIOR TO INSTALLATION.
N
~i
6' WING 14' RAMP 6' WING
OPTION A
N
4' WING 4' RAMP 4' WING
OPTION B
12:1 12:1 -
N
LL.
6' RAMP 6' RAMP
[AN01 G
OPTION C
issvm: MAY 15, 2009
DRAW CHECKED BY: ar. MJ MJ SS CITY OF BOULDER, COLORADO REVISED:
APPROVED BY. ATTACHED S I D E W A L K DRAWNG NO.
DIRECTOR OF PUBLIC WORKS CURB RAMP OPTIONS 2.07
-a.ft'v
DESIRED RAMP DESIGN DESIRED RAMP DESIG
FOR ATTACHED WALK FOR DETACHED WA
w
Y ~
J N
Q
o O 4' MI ARANCE
n
4' MIN CLE NC ~ i I I'ulj SIDEWALK
A D IUI 4,
Ml
SIDEWAL 17'
(TYP) WING
SEE C RAMP DETAIL 0
O NG
SIDEWALK 2 IN
SIDEWALK
r' ^ O
J a
RAMP DESIGN FOR N
ATTACHED WALK o
WITH LIMITED R-O-W TYPICAL RAMP DESIGN
(BASED ON EXISTING CONDITIONS FOR MULTI-USE PATH
NOTES:
1. RAMP WIDTHS SHALL CH SIDEWALK/PATH WIDTHS (4' T MINIMUM, 6 FEET MINIMUM
DESIRABLE FOR CO CIAL AREAS),
2. RAMP WINGS SHA OT EXCEED A SLOPE OF 12:1 WHEN US AT LOCATIONS WHERE
4 FEET CLEARA 'IS NOT AVAILABLE BEHIND WALK,
3. RAMPS SHAL ALIGNED DIRECTIONALLY ACROSS EACH STREET SSING.
4, VARIATION DIMENSIONS MAY BE AUTHORIZED BY THE DIRECTOR 0 BLIC WORKS
DUE TO ING OBSTRUCTIONS, VARYING CURB RADII AND INTERSECTI ALIGNMENT.
Aum: Y 2, 1998
D/Br CITY OF BOULDER, COLORADO aEm~o.
C17, 2000
ASIDE~WALK AC
CESS. DRA"NG CURB RAMP LOCATION 2.07
GUTTER 6' (TYP)
0
NO LIP AT FLOW LINE
12
1 6' CONCRETE
SECTION A-A
SCORING
O
FO DETACHED WALKS
NOTES:
1. RAMP WIDTHS SHALL CH SIDEWALK/PATH WIDTH (4 FEET [MUM).
2.RAMP SURFACE S BE TEXTURED WITH A COARSE BROOMED ISH AND SCORED WITH
GROOVES 1/4 IN EEP BY 1/4 INCH WIDE ON A i FOOT GRID.
3. NORMAL GU LOW LINE AND PROFILE SHALL BE MAINTAINED TH GH THE RAMP AREA.
4. RAMP WING NSIONS VARY (2 FEET MINIMUM) SUBJECT TO MEETING STANDARDS.
SEE CURB P LOCATION FOR ADDITIONAL INFORMATION.
lmuwl LY 2,1998
DRAM a7: CITY OF BOULDER, COLORADO REVISED:
cRECKEO R 17, 2000
~aft
APPR BY: SIDEWALK ACCESS DRAWING
WNE Pumc WOWS
CURB RAMP DETAIL 2.07. .
~ls
o
~q< ! A
q,Q ~,gMA~Fiyq y ~~o W .
2- CAN
' ~qC
r~oN ygR,o
A 2..... .
COMMERCIAL MIN 10' - MAX 35'
RESIDENTIAL 'MIN 10' - MAX 20'
NOTE: CONTRACTION JOINTS ARE REQUIRED AT EACH SIDE OF WARPED
SECTION AND EVERY 10 FEET (MAXIMUM) ALONG RAMP DRIVE.
~---CURB AND CONCRETE PAVEMENT SECTION
GUTTER SECTION
VARIES MATCH
SIDEWALK WIDTH
CHAMFER
a 1
*I a_ •a •a
NO LIP AT w
MONOLITHIC POUR
6" RESIDEN11AL
" COMMERCIAL AND
SECTION A-A * 8
PUBLIC ALLEYS
BRA%W BY. JSH Mum: JULY 2, 1998
cHEacm ay,. WGH CITY OF BOULDER, COLORADO R"WD: MAY 15, 2009
AWRCVEO BY, DRIVEWAY RAMP DRAWING NO.
D1RECraz rF PU! C vme"• DETACHED WALK 2.21
kq< ~A
y~ e
2' ooy~
q°"oN qR
v
2
COMMERCIAL MIN 10' X 35'
RESIDENTIAL MIN 10' - 20'
NOTE: CONTRACTION JOINTS ARE RE ED AT H SIDE OF WARPED
SECTION AND EVERY 10 FEET ( MU LONG RAMP DRIVE.
{»-CURB AND C ETE PAVEMENT SECTION
GUTTER SECTION I
VAR[ WALK
SIDEWALK WIDTH II
CHAMFER o d' L pIr
a ~~11
NO LIP AT IL
MONOLITHIC POUR
SECTION A-A * 8" C IDERCIAL AND
PU ALLEYS
WU~ Y 2, 1998
DRAWN CHECHECKED BY: BY: H CITY OF BOULDER, COLORADO RE. 17, 2000
C
AP Y. DRIVEWAY RAMP DRAMNCN
DIRE "°RU"OP.KZ DETACHED WALK 2.21
c l2
ROW INSPECTOR APPROVAL REQUIRED PRIOR TO INSTALLATION.
TRANSITION TO NARROWER NOTE: MAY REQUIRE
4' SIDEWALK (AS NECESSARY) SIDEWALK EASEMENT
~
ty°k A
e
72 , gyp} ®~P}
Mq~, ti
1
7~.
MIN 10' - MAX 35' * ~Mq
MIN 10' - MAX 20' /
A~ s,y ///JJJ
5h CURBWALK
2% MAX
NOTE: CONTRACTION JOINTS ARE REQUIRED. AT EACH SIDE OF WARPED SECTION
AND EVERY 10 FEET (MAXIMUM) ALONG RAMP DRIVE.
CURB & 6' MIN. * 4' MIN.
GUTTER 5 MIN. ®2% MAX
12:1 MAX ,
c
8
NO LIP AT rl
MONOLITHIC POUR
SECTION A-A
* MULTI-FAMILY RESIDENTIAL, COMMERCIAL & PUBLIC ALLEY
SINGLE-FAMILY AND DUPLEX RESIDENTIAL
DRAWN BY: SIK CITY OF BOULDER, COLORADO wom. MAY 15, 2009
CHECKED BY. MJS DRIVEWAY RAMP REMSF➢_
APPROVED BY. CURBWALK DRAWING NO.
mRWM DP PUSUC WORKS 2.22. A
CDOT TYPE 1
ROW INSPECTOR APPROVAL REQUIRED PRIOR TO INSTALLATION.
TRANSITION TO NARROWER
SIDEWALK (AS NECESSARY)
4'
qk
a
,t
S',t
MIN 10' - MAX 35!
MIN 10' -MAX 20' V
A
CURBWALK
2% MAX
NOTE: CONTRACTION JOINTS ARE REQUIRED AT EACH SIDE OF WARPED SECTION
AND EVERY 10 FEET (MAXIMUM) ALONG RAMP DRIVE.
CURB & 4' MIN.
GUTTER "I
2% MAX
NO LIP AT f
MONOLITHIC POUR
SECTION A-A
At MULTI-FAMILY RESIDENTIAL, COMMERCIAL & PUBLIC ALLEY
SINGLE-FAMILY AND DUPLEX RESIDENTIAL
DRAWN BY: SIK CITY OF BOULDER, COLORADO - MUM. MAY 15, 2009
CHECKED BY: M JS DRIVEWAY RAMP' REVISED:
APPROVED BY: CURBWALK DRAWING NO.
DIRECiDR OF wauc WoRlcs
CDOT TYPE 2 2.22.B
TRANSITION TO NARROWER
SIDEWALK (AS NECESSARY)
SLOPE TO ACHIEVE
12:1 MAX. SLOPE
THROUGH DRIVE
_ 72 7 Q'1'
SLOPE TO ACHIEVE
12:1 MAX. SLOPE
* * THROUGH DRIVE
8't''l r
MIN 10' -MAX 35'
MIN 10' -MAX 20' V
A
S } J CURBWALK
SLOPE 1/4'•
PER FOOT
NOTE: CONTRACTION JOINTS ARE REQUIRE EACH SIDE OF WARPED SECTION
AND EVERY 10 FEET (MAXIMUM) AMP DRIVE.
F-- CURB & MIN.
I GUTTER IN.
12:1 MAX Q
8 s'd A e~.
♦ e
NO LIP AT E
MONOLITHIC POUR
SECTION A-A
* MULTI-FAMILY RESIDENTIAL, COMMERCIAL & PUBLIC ALL
SINGLE-FAMILY AND DUPLEX RESIDENTIAL
CITY OF BOULDER, COLORADO ULY 2, 1998
DRAWN BY: H
CHMED - GH :sm: T. 17, 2000
DRIVEWAY RAMP DRAWN
DIRE
APPR f".
DIRE OF PIIWJC WDRIC5 FOR CURBWALK 2.2
l~
NOTES:
DIMENSIONS:
1. HEIGHT-33" FROM THE GROUND
2. CONTINUOUS BEND INSIDE RADIUS=7"
MATERIALS AND CONSTRUCTION:
1. MINIMUM OR 1 1/4" SCHEDULE 40
STEEL PIPE (1 5/8" OUTSIDE DIAMETER)
X05 2. MAXIMUM 1 1/2" SCHEDULE 40
STEEL PIPE (2" OUTSIDE DIAMETER)
3. SOLID ONE-PIECE CONSTRUCTION;
CONTINUOUS BEND; LEGS 14"-18" APART
4. GALVANIZED WITH BLACK POWDER
COAT FINISH
5. FLUSH MOUNTED WITH WELDED BASE
PLATES (6" DIAMETER, 3/16" THICK
BASE PLATE). HIDDEN OR VANDAL-
RESISTANT FASTENERS (SCREWS OR
EXPANSION BOLTS)
3 16 TYP.
T 120' (TYP.)
FLUSH-MOUNT SASEPLATE
7/16" HOLE l~el
(TYP.)
BASEPLATE DETAIL
JULY 2, 1998
oEcK JSH CITY OF BOULDER, COLORADO ism: MAY 15, 2009
cxec~o s y. RJH
APPROVW er. INVERTED " U 11 DRAwWG NO.
BICYCLE RACKS
2.52.A
A m 1_5~ftp 0
NOTES:
DIMENSIONS:
1. HEIGHT-33" FROM THE GROUN
2. CONTINUOUS BEND INSIDE S=7"
MATERIALS AND CONSTRUCTI
1. MINIMUM OR 1 1/4" DULE 40
STEEL PIPE (1 5/8" TSIDE DIAMETER)
OJ5 2. MAXIMUM 1 1/2" HEDULE 40
STEEL PIPE.TSIDE DIAMETER)
3. SOLID ONE CE CONSTRUCTION;
CONTINU BEND; LEGS 14"-18" APART
4. GALVA D WITH BLACK POWDER
COA ISH
5. MOUNTED WITH WELDED BASE
ES (6" DIAMETER, 3/16" THICK
SE PLATE). HIDDEN OR VANDAL-
RESISTANT FASTENERS (SCREWS OR
EXPANSION' BOLTS)
P.
3 16
M
T i I 120' (TYP.)
FLUSH-MOUNT BASEP
7/16" HOL l~el
MID )
BASEP DETAIL
ULY 2, 1998
CHECKED BT: CITY OF BOULDER, COLORADO T. 17, 2000
CRAB. J
APPK "INVERTED U " DRAMflN
BICYCLE RACK
2.5
NOTES:
EXPOSED CONCRETE SURFACE TO BE BROOM FINISHED.
PAD SIZE MAY VARY AS DIRECTED BY THE ENGINEER.
PAD IS TO BE CONSTRUCTED WITH CLASS B CONCRETE.
EXCAVATION AND/OR EMBANKMENT REQUIRED FOR PAD
CONSTRUCTION-WILL NOT BE PAID FOR SEPERATELY, BUT
SHALL BE INCLUDED IN THE COST OF THE PAD. CONCRETE
SHALL BE SLOPED AT 2% TO DRAIN.
k3'-4" MINIMUM WHEN
INVERTED-U RACK 'INSTALLED PERPENDICULAR TO
A WALL OR CURB.
' 3' MINIMUM WHEN INSTALLED
6" CONCRETE PAD PARALLEL TO A WALL OR
CURB. 5' MINIMUM
SEPARATION FROM CURB FACE
WHEN INSTALLED ADJACENT TO
A CURB WITH "HEAD-IN"
Z.#} AUTOMOBILE PARKING.
b sss.
. 2 / 10' MINIMUM IF MORE THAN
TWO "U" RACKS IN A SERIES.
•f
SIDE-BY-SIDE INVERTED-U RACK
q N t `
6 \
p /f
6° CONCRETE PAD
\
Z'yk
4' Z't' END-TO-END
DRAWN BY. JSH ism: JULY 2, 1998
CHECKED Br. RJH CITY OF BOULDER, COLORADO REhsm. MAY 15, 2009
APPROVED BY: INVERTED "U" DRAYMNG NO.
DINEC7uR CF f,=c WORKS BICYCLE RACKS 2.52.13
1 56:423
NOTES:
EXPOSED CONCRETE SURFACE TO BE BROOM FINISHED.
PAD SIZE MAY VARY AS DIRECTED BY THE ENGINEER.
PAD IS TO BE CONSTRUCTED WITH CLASS B CONCR
EXCAVATION AND/OR EMBANKMENT REQUIRED FO
CONSTRUCTION WILL NOT BE PAID FOR SEPERA UT
#ADD 3'- OR EACH SHALL BE INCLUDED IN THE COST OF THE PA NCRETE
ADDITIONAL CK ON A SHALL BE SLOPED AT 2% TO DRAIN.
MULTIPLE RA. NSTALLATION.
RACK SPACING 3'-0" ON
CENTER.
INVERTED-U RACK
6" CONCRETE PAD
\
3 .2
/ 6~
SIDE-BY-SIDE I TED-U RACK
4P
M ~ \
I
6"
6" CONCREI D
\0^
4\0^ 2\0^ END-TO-END
DRAWN Br. issom: JULY 1998
QffiCKm JH CITY OF BOULDER, COLORADO nmsm:OCT. 1 .DDD
APPR Dft Y BICYCLE PARKING DRAW NG NO.
DIRE PUBl1C 'ADRKS
2.53
* 5' MINIMUM (STANDARD)
8' MINIMUM (VAN)
9' 8' * 9'
ACCESS 19
STANDARD ACCESSIBLE AISLE STANDARD
SPACE SPACE SPACE
* 5' MINIMUM (STANDARD)
8' MINIMUM (VAN)
9' 8' * 8' 9'
ACCESS 19
STANDARD ACCESSIBLE AISLE ACCESSIBLE STANDARD
SPACE SPACE SPACE SPACE
ssum: JULY 2, 1998
DRAWN aifc By. JSH CITY OF BOULDER, COLORADO REVISED: MAY 15, 2009
crrtcKm Br: MGS
APROVED BY. ACCESSIBLE DRAWING NO.
oftci a w c xvrsia
PARKING STALL 2.54
N 9' 12' 9'
19'
REGULAR NDICAPPED AISL REGULAR
SPACE SPACE
HANDICAPPED R G STALL
9' 12' 3' 12 9'
19'
REGULAR HAN PPED AISLE HANDICAPPED LAR
SPACE SP
k
DRAWN 13Y. issum: J UL 1998
CHECKED H GS CITY OF BOULDER, COLORADO REVISED: OCT. DOo
CHECK
APP 9Y: HANDICAPPED DRAWING NO.
a vUSUC xcwcs
PARKING STALL 2.54
rr"NIVr?Yr :7'
54' - 65' 56' - 67'
12 8 ttII2 22-33 1.5 15 1.5 11-22 11 5 2 8 8 II2
i t I I I ~ ~ O I I I 1
SIDEWALK J LANDSCAPED AREA
OFF STREET PED/BIKE PATH ON STREET BIKE LANES
ALTERNATIVE
PRINCIPAL ARTERIAL
36.5'-47.5' 38.5'-49.5'
5.5-
1 12 5 12, -16.5-27.5 16.5 11 5 2 8 5 2
NOTE:
.ALL RIGHT-OF-WAY WIDTHS
AND CROSS SECTIONS SHOWN 46' -
ARE FROM INTERSECTIONS 5.5-
AND TURN LANES. ADDITIONAL 116.51 12 1 1 1 6~5 117//7/7/-/, 28 ( 5 (7
RIGHT-OF-WAY AND LANE WIDTHS
MAY BE REQUIRED FOR INTERSECTIONS
AND TURN LANES.
PARK
9 FEET IF
ON STATE
OFF STREET PED/BIKE PATH ON STREET BIKE LANES HIGHWAY
f- ALTERNATIVE
MINOR ARTERIAL
DRAM Br: JSH CITY OF BOULDER, COLORADO issum' JULY 2, 1998
pi6cKEo ar: MGS NON-RESIDENTIAL Rmsm: MAY 15, 2009
AvpROVED Br:
STREET CROSS-SECTION. °RA"""°"°.
DIR&CM OF PUBUC W MKS
2.61. A
EXAMPLES
54' - 65' 56' - 67'
12 S 2 22-33 1.5 15 1.5 11-22 11 5 2 8
II I'l I I I I loll
SID K I LANDSCAPED AREA
OFF STIR PED/BIKE PATH ON STREET LANES
ALTERNATIVE -
RINCIPAL ARTERI
36.5'-47.5 38.5'-49.5'
1 12 1 5 12I 16.5-21W, 11 5 21 6 15 12
lol
NOTE:
ALL RIGHT-OF-WAY WIDTHS
AND CROSS SECTIONS SHOWN
ARE FROM INTERSECTIONS 5.5-
5 1
AND TURN LANES. ADDITI (16.5 12 6 2 11
RIGHT-OF-WAY AND LAN THIS 1 I 1
MAY BE REQUIRED FOR IRSECTIONS I 0
AND TURN LANES.
PARK
9 FEET IF
OFF S T PED BIKE PATH ON STATE
/ ON STREET BIKE LANES HIGHWAY
ALTERNATIVE
MINOR ARTERIAL
CITY OF BOULDER, COLORADO 'mm- JULY 2, 8
DRAWN BY:
atEacm GS NON-RESIDENTIAL REVISED: OCT. 17,
AP BY.
STREET CROSS-SECTION DRAWING NO.
D OF rueuc xvracs
EXAMPLES 2.61. A
31' - 36.5' ` I-F--32' - 38.5'
1
1 12 5 2 11-16.5 11-17. 5 2 8 5 1
I lo ,
SIDEWALK f "4~LANDSCAPED AREA
- 40.5' - 46'
I1-17. 5 6.5 2 8 J52
PARK
OFF STREET PED/BIKE PATH ON STREET BIKE LANES
ALTERNATIVE
COLLECTOR
NOTE:
ALL RIGHT-OF-WAY WIDTHS AND CROSS SECTIONS SHOWN ARE FROM INTERSECTIONS
AND TURN LANES. ADDITIONAL RIGHT-OF-WAY AND LANE WIDTHS MAY BE REQUIRED
FOR INTERSECTIONS AND TURN LANES.
DRAWN BY: JSH CITY OF BOULDER, COLORADO 'ssDED: JULY 2, 1998
CHECKED BY: MGS RE"'sm' MAY 15, 2009
NON-RESIDENTIAL
APPROVED BY.
DIRECTOR OF POBUC WORKS STREET CROSS - S E C TI' O N DRAWING NO.
2 . 6 1 . B
EXAMPLES
31' - 36.5' - 32' - 38.5'
JI
1 5 2 11-16.5 11-17. 5 2 8 5
I'
11 SIDEWALK LANDSCAPED AREA
.5' - 46'
11-1 6 6.5 2 8 5 2
PARK
OFF STREET PED/BIKE PATH 0 TREET BIKE LANES
ERNATIVE
OLLECTOR
N OTE:
ALL RIGHT-OF-WA IDTHS AND CROSS SECTIONS SHOWN ARE FROM I RSECTIONS
AND TURN LANE ADDITIONAL RIGHT-OF-WAY AND LANE WIDTHS MAY REQUIRED
FOR INTERSECT] AND TURN LANES.
DRAWN BY:
CITY OF BOULDER, COLORADO ISSUED: Y 2, 1998
CHECKED BY, S REKSDO: OC 7, 2000
NON-RESIDENTIAL
APPR
STREET CROSS-SECTION DRAN7NG NO,
DIRECT PUBLIC WORKS EXAMPLES 2.61 .
f"5 8 ALK
WALK
MIN MIN WALK
~ 32 ~
p 60' o
I i
RESIDENTIAL COLLECTOR
JULY 2, 1998
DRAWN BY. cocciED a BY: RJ RJHH CITY OF BOULDER, COLORADO REIASM: MAY 15, 2009
CHECK
APPHDM BY. RESIDENTIAL COLLECTOR ORAW NG NO.
.~cmw CROSS--SECTION
2.63
'/"~~sm~
i
1
5' 8' 6'
WALK MIN PARKING PARKING MIN WALK
32'
Aff 31:
O
60' O
1 i
tr o:
1/11 COLLEC
DRAWN BY. ~ SE Y 2, 1998
aWCKreacm JH CITY OF BOULDER, COLORADO R ~ 0 17, 2000
AP BY. RESIDENTIAL COLLECTOR DRAWING N .
CROSS-SECTION
2.63
4 8 4~~
WALK MIN MIN WALK
30'
3 3
p 60' O
I I
a a!
RESIDENTIAL STREET
= JULY 2, 1998
DRAWW aiEcKiECrcm BY:
er: RJH H CITY OF BOULDER, COLORADO REmsm: MAY 15, 2009
APPROVED B,: RESIDENTIAL STREET DRAWING NO.
CROSS-SECTION
2.64
pw @_Z2_3
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I
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WALK MIN PA G P N MIN WALK
30'
p 60' o
i I
RESIDENTIAL STREET
scum\012~, 1998
DRAVM BY: H CITY OF BOULDER, COLORADO REVMM
CHECKED RJH 2000
APP 6Y: RESIDENTIAL . DRAWWG No.
OF ~c KIM
CROSS-SECTION
2.64
CL
4'r W4'-
WALK ALK
3 26'
0 oI
~ 40' ACCESS STREET
DRAY" BY, JSH CITY OF BOULDER, COLORADO issuEO: JULY 2, 1998
CHECKED By. RJH RESIDENTIAL REYSM: MAY 15, 2009
APPROVO BY:
ACCESS STREET DRAWING NO.
CROSS-SECTION 2.66
WALK 6' yI 6' WALK
PARKING 1 f PARKING
26'
I ~
O O
a 40,
I
ACCESS STREET
/RJH CITY OF BOULDER, COLORADO imm JU' 7698
RESIDENT 1 A L ~SM, OCT . 2000
BY.
ACCESS STREET °R""""G"
S
CROSS-SECTION. 2.66
A I~
STREET SIGN
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I I SEE DRAWING NO. 2.87
II
2' *MI S T~Q P
II
*36" TO BACK
OF ATTACHED
MULTI-USE 0 30" x 30" SIGN (.100 GA) WITH
PATH AND 12" VANDAL PROOF HARDWARE
TO BACK OF 0 EQUAL TO CITY HARDWARE
ATTACHED 0 USED
SIDEWALK
0
0
0 2" POST
TELESTAR TUBING
7' MIN 0 PERFORATED 12 GUAGE
0
0
0
0 TWO TL-3806CP
0 DRIVE RIVETS
r 4" 0 (ON FRONT & SIDE)
ICI
f 61. T I I
L STREET CURB
3•
2 1/4" ANCHOR
12 GUAGE I I TYPICAL AS STATED IN
THE UNIFORM TRAFFIC
CONTROL DEVICES
MANUAL
LJ
DRANK BY. JSH ISSUED: JULY 2, 1998
CITY OF BOULDER, COLORADO REVISED: MAY 15, 2009
CHECKED BY. MGS
SIGN INSTALLATION DRAWING NO.
APPROVED BY.
DIRECTOR OF PUBLIC WORKS DETAILS 2.81
STREET SIGN
21 /2 a
I I SEE DRAWING NO.
II
-2' Ml p
li
I I
0 30" D" SIGN (.100 GA) WITH
-3806CP DRIVE RIVETS
0
0
0
0
2" POST - 20F12PG
TELESTAR TUBING
7' MIN PERFORATED 12 GUAGE
0
0
TWO TL-3806CP
o DRIVE RIVETS
3"
r o
J- I01
3.T I f
S T CURB
I I 3'
1/4" ANCHOR
22F12~-A3PG I I ICAL AS STATED W
I I 7 UNIFORM TRAFFIC
CO OIL DEVICES
I I MAN
LJ
ISSUED. LY 2, 1998
CHECKED DRAWN aY: 8 GS CITY OF BOULDER, COLORADO kEwSED: 17, 2000
TYPE I DRAWING
APP Y-. Di OFPUSUG WMS SIGN DETAILS 2.81
c.D-a-5- c I- 4
SPIqED
Ll~11T
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0
MIN 0 24" x SIGN (.100 GA) WITH
TWO 3806CP DRIVE RIVETS
0
0
0
7' MIN 0
1 3/4" POST 16F12PG
0
WO TL-3806CP DRIVE RIVETS
o
3.. 0
o
.
2" CHOR-`---~I I 3'
2-A3PG I
u
ORnxn Bv.
ISSUED: \OC171 . 1998
CHECKED B . Gs CITY OF BOULDER, COLORADO REVISED: -2000
TYPE 11 DRAWING NO.
BY. APPR
pR OF P F PUBLIC WORKS SIGN DETAILS-
2.82
NOTE:
THIS SIGN WITH AN ARROW
SHOULD BE SET AT AN A
OF NOT LESS THAN 30°
MORE THAN 45° WITH LINE
4' MIN -ANY OF TRAFFIC FLOW T
M1E VISIBLE TO APPRO NG TRAFFIC.
O
0 \-12" x 18" (.100 GA) WITH
TWO TL-3 CP DRIVE RIVETS
0
0
0
6'-7" MIN 0
0 1 1/2" POST
14F12PG
0
0
0
o
0
3., ICI
I I
I I
I I 3'
1 3/NCHOR'____ -1 1
16F1 PG I
I I
1
LJ
IMED Y 2, 1998
DRAWN B7: fi!H CITY OF BOULDER, COLORADO REVISED:
CHECK MGS 0 17, 2000
TYPE III DRAWING N0.
AP BY
OF PUBLIC WORKS SIGN DETAILS 2.8 3
SP~gED
BICYCLE/PEDESTRIAN PATH 36 LI
OTHERWISE 12
OF' o
0
O
0
0
0
0
o
0
0
0
0
0
o
O
SIDEWALK o
STREET
LA AL CLEARANCE FROM SID ALK
DRAWN BY: scum: LY 2, 1998
CHECKED Gs CITY OF BOULDER, COLORADO REVISED: 17, 2000
AP BY. TYPE 1, 11, 111 DRAWING N
a OF Pu&JC WORKS
SIGN DETAILS 2.84
1' MIN
0
0
0
0
0
0
0
0 5' MIN
0
0
0
STREET CURB
0
2'
V-LOC------~
DEL 175
NOTE: WHE POSSIBLE, INSTALL V-LOCK PRIOR TO PLACEMENT OF OINING
CONCRETE. ERE CONCRETE ALREADY EXISTS, AN 8 INCH DIAMETER E IS
REQUIRED ND THE HOLE SHALL BE GROUTED FOLLOWING INSTALLATION V-LOCK BASE.
DRAWN BY: H CITY OF BOULDER, COLORADO i ULY 2, 1998
CHECKED MGS I N STALL I N CONCRETE R~~: 17, 2000
APP BY: - ALL TYPES DRAWING
IN OR OF MUM WORKS
SIGN DETAILS 2.85
A llt OAZ
}~-12"y l STANDARD R7-8 RESERVED
PARKING (12" x 18") AND
p SUPPLEMENTAL INFORMATION
p0 I SIGN (24" x 18")
18"
O 112" x 18" SIGN
O
O
O
18° I p
24" x 18" SIGN
III-- O
O
12"
6 12" x 6" SIGN
O
7' 0-
0
2" POST
O TELESPAR TUBING
O PERFORATED 12 GAUGE
0 TWO TL-3806CP
DRIVE RIVETS
O (ON FRONT & SIDE)
3' I I 2 1/4" ANCHOR
TYPICAL AS STATED IN THE
u MANUAL ON UNIFORM TRAFFIC
CONTROL DEVICES
DRAWN BV:JSH CITY OF BOULDER, COLORADO issum JULY 2, 1998
a+eacm er. MGS ACCESSIBLE RE`''sED' MAY 15, 2009
APPROVED BY: PARKING DRAWING NO.
DIRECTOR OF PUBIIC WORKS
SIGN DETAILS 2.86
\~l STANDARD R7-8 RESERVED
SUPP EMENTALxINFORMATION
SIGN (21x 15") TYP E B
12" x 18" SIGN WITH 12"
TWO TL-3806CP
DRIVE RIVETS
18"
0
21" x 15" SIGN WITH
TWO TL-3806CP
o DRIVE RIVETS O
21., O I 10 1 15..
i
O -
0
o
I +21
O
7' p \ O
p 2" PO 20 G
3'
TELE TUB p
p PE ATED 12 UGE p
O 0
O 0 TL-3806CP o
o DRIVE RIVETS p
o
3' 2 1/4" ANCHOR
22F12-A3PG
TYPICAL AS STATED IN THE
u UNIFORM TRAFFIC CONTROL
DEVICES MANUAL
DRAWN JSH CITY OF BOULDER, COLORADO [SMEM, N12,' 199a
cNv: MGS HANDICAPPED REVISED: 2000
oven IM PARKING DRAWING N0.
CTOR OF FUSUG WORKS
SIGN DETAILS 2.86
NOTE:
ALL 9" STREET NAME SIGNS SHALL
BE OF EXTRUDED ALUMINUM ALLOY
6065-T6, OR APPROVED EQUAL.
.091" THICK WEB WITH .250"
THICK EDGES.
0
990X BRACKET
1-SET #97SQX WITH
PRP 38 PIN HEAD SET
SCREWS (VANDAL PROOF)
WITH SLEEVE
(2" SQUARE TUBE)
ALL HARDWARE
CONSISTANT WITH O
EXISTING CITY MATERIALS
DRAWN BY: JSH CITY OF BOULDER, COLORADO 'ss'ml' JULY 2, 1998
'O~ MAY 15, 2009
CHECKED 9Y: MGS STREET NAME
APPSDVED P SIGN MOUNTING DRAWING NO.
(NRECTQR F ~ PUBLIC WOWS DETAILS 2.87
NOTE:
ALL 9" EET NAME SIGNS SHALL
BE OF E DED ALUMINUM ALLOY
6065-T6, APPROVED EQUAL.
.091" THICK WITH .250"
THICK EDGES.
0
99OX BRACKE
WITH 3-FS-ST 1 SCREWS
1-SET #97SQX WITH 3-FS-S -1 0
VANDAL PROOF FASTENERS 0
AND PRP 38 PIN HEAD SET
SCREWS WITH SLEEVE
(2" SQUARE TUBE)
0
0 5" TOTAL
SLEEVE
0
O LENGTH
0
0
DRAM) BY: JSH CITY OF BOULDER, COLORADO kFD-* ULY 2, 1998
CHECKED : MGS STREET NAME R CT. 1 7, 2000
BY.
SIGN MOUNTING DRA N0.
OF PUBLIC WORKS -
DETAILS 2°8
Multi-Use Path Detour
Traffic Control Plan
Typical Application
SPECIAL
PATH
CLOSED
M4-9a
M4-9a
SPECIAL
M4-9a 4
ws -
SPECIAL
~ SPECIAL
nF:5
W~
M4-9a .y
T i
SPECIAL
~ PATH
CLOSED
M4-9a z
M4-9a
TEMPORARY DESIGNATION OF A
SIDEWALK AS A MULTI-USE PATH
NOT TO SCALE
-,-A ~ f
Bike Lane Closure
Traffic Control Plan
Typical Application
MAY USE
~ FMLLIAXE
R4-11 R4-11
MAY VSE
FULLLUNE
SLx10 SL 10
R2-1 R2-1
i (R needed) i pt needed)
SPEED SPEED
LIMIT LIMIT
200 ft 25 200 25
.II.-- SPECIAL i SPECIAL
SL x 10 SPECIAL SL x 10 SPECIAL
W20-1 W4-2
SLx10
i
W20-5
SL c10
1
W20-1
BIKE LANE BIKE LANE + ADJACENT
CLOSURE ROADWAY LANE CLOSURE
NOT TO SCALE
Acmdo rmm 5 Ise
ATTACHMENT E
CITY OF BOULDER, COLORADO
BOARDS AND COMMISSIONS MEETING SUMMARY FORM
NAME OF BOARD/COMMISSION: Transportation Advisory Board
DATE OF MEETING: May 11, 2009
NAME/TELEPHONE OF PERSON PREPARING SUMMARY: Suzanne Lieberman, 303-441-3266
NAMES OF MEMBERS, COUNCIL, STAFF AND INVITED GUESTS PRESENT:
BOARD MEMBERS:
TAB -Myriah Conroy, Spenser Havlick, Michael Deragisch, David Driscoll, Matt Moseley
STAFF - Michael Sweeney, Bill Cowem, Martha Roskowski, Ken Baird, Noreen Walsh, Debbie Ritter -
Transportation Project Manager, Jeff Arthur - Engineering Review Manager, [Suzanne Lieberman, Secretary -
absent]
WHAT TYPE OF MEETING [REGULAR]
Agenda Item I -Call to Order.
The meeting was called to order at 6:02 p.m.
Agenda Item 3 - Meeting Minutes from April 13"' for approval.
Motion: Havlick moved to approve the April 13th minutes as amended.
Seconded: Moseley
Vote: 4-0, Passed [Deragisch abstained because he was absent from the April 13"' meeting.]
Agenda Item 4 - General Public Participation.
Kurt Nordback: Safety concerns about multi-use path south of Table Mesa Drive; doesn't seem designed for
safety. Constructed before there was significant traffic or understanding about safety design needs. Would like
the city to determine whether there are actual safety issues and to think about possible alternatives. I-lis wife,
Krista Nordback, researching Highway 93 safety, of which this path is an extension: Ludlow to Table Mesa
Drive; twelve accidents over four xears, not significant, but Bill Cowern dubious about CDOT data. Driscoll:
Concern about vehicles leaving shopping center and turning onto Broadway without looking for cyclists?
Nordback: Concerns with cars leaving and entering shopping center. Two curb cuts at the comer gas station and
at least two curb cuts at the shopping center where vehicles are obscured. Also had two vehicles bit him
simultaneously at Ludlow. Car turning left off of northbound Broadway not looking for cyclists. Cowern: City
looked at this area two to three years ago. Mami Ratzel and Cowem identified the location as a high-accident
location. City designed and implemented plans to substantially improve signing, sniping, and clearing site
obstructions at driveways. But city can go back and look at whether improvements have worked, although more
time usually needed to find trends. Conroy: Someone called her about Darley/Grinnell intersection safety issues.
Would be helpful to see whether city's improvements have contributed to decreased accidents and expected
outcomes. Cowern: City currently conducting before-and-after study on 17"' Street improvements and other
areas. Deragisch: Boulder bicycle commuters have suggested and implemented improvements on 29" street;
would like north-south traffic on Broadway to be shunted over to Lashley Lane with similar improvements.
Moseley: Where are 17"' Street improvements located? Cowern: University to Walnut.
Agenda Item 5 - Public hearing and consideration of a recommendation regarding proposed changes to
the Boulder Revised Code (BRC) and the Design and Construction Standards (DCS) associated with work
area traffic control.
Cowem gave the presentation. Transportation impacts resulting from construction activity is a frequent and
understandable concern from residents. As construction activity has increased over the past few years, concern
about the transportation related impacts of that construction have increased as well. In response to these concerns
staff began a process to review and amend city ordinance, standards and policies that guide work zone traffic
control.
Transportation Advisoryy Board
Summary Minutes
May 11, 2009
Page I of 6
Ago* %mi Poo 0
Currently, city of Boulder work zone traffic control policy is detailed in a document titled "Work Area Traffic
Control and Safety Handbook" (WATCaSH). This document was drafted in 1981 and has not been modified
since. Few people were aware of this document and it was not being used for public or private projects. Initially,
staff intended to update this document with current practices and procedures. However, as this project advanced
it was determined that the best way to accomplish the goals of the project were to incorporate work zone traffic
control policy into the Design and Construction Standards (DCS). The new DCS section would provide policy
on the process for approving and implementing Method of Handling Traffic Control (MHT) plans and would
replace the stand alone handbook (the WATCaSH). Several associated changes to the Boulder Revised Code
(B.R.C.) are also recommended. Many of these changes are intended to clarify legal requirements for work zone
traffic control and to make it easier to enforce against violations of these requirements.
Staff was seeking a TAB recommendation on the proposed BRC amendments and the new section of the DCS,
pertaining to work zone traffic control policies and procedures. After TAB recommends the proposed changes,
staff will present these proposals to the Planning Board for their review and recommendation. Following that,
staff will present these proposals to the City Council for their review and approval. It is anticipated that this will
occur over the summer 2009.
TAB discussion included: Feedback: Request that pedestrians and cyclists be given same advanced
notice/level of courtesy as vehicles when roads, sidewalks and paths are closed due to damage or construction as
part of overall policy, and suggestion to include clarification of this policy in memo or as part of a motion;
confirmation that staff still follows the "hierarchy of modal priorities" (i.e. pedestrians, cyclists, transit, vehicles)
as part of the TN4P ("Transportation Master Plan"). Discussion of discrepancy in standards for state and federal
signage for traffic closures versus those for the city and confirmation that city intends to improve its standards
after adoption of work area traffic control changes in the BRC (`Boulder Revised Code") and DCS ("Design and
Construction Standards"). Staff's desire to use proposed changes to achieve a balance among modes for non-
standard closures so that traffic engineer becomes involved in decision-making (versus just project managers and
right-of-way inspectors being involved); staff's expectation that an increased focus on non-standard closures will
improve the overall work area traffic control system. Discussion of whether the proposed changes would
increase permit costs. Discussion of whether TAB should monitor the work area traffic control standards after
Council approves them. Suggestion to provide more detail on quantifying "additional costs" in "Fiscal Impacts"
section. Request for examples of modifications staff made based on public feedback in "Public Feedback"
section of memo (Page 2): difficult for staff to identify stakeholder feedback due to substantial changes made,
particularly in DCS component. Concern with lack of limits to city's discretion on requiring plans for any work
impacting rights-of-way (Section 8.04a): suggestion to either change "may require a plan" to "will require a plan"
or otherwise reference relevant areas of the code for which discretion can be limited. Driscoll gives hard copy of
suggested punctuation/word choice revisions to Cowem. Request for TAB to express its gratitude to CDOT for
thorough bicycle and pedestrian signage for the Cherryvale Bridge construction. In response to public comment,
TAB request for staff to clarify that it treats the Boulder Valley School District the same as other applicants in
terms of permit requirements for public rights-of-way and easements.
Clarifications: Question about waiver from CDOT Region 4 on lane closure strategy requirements: CDOT
agrees to the waiver in principle but wants to review the city's policies and procedures and ensure the city's
proper handling of work zone traffic control before it agrees to the waiver; staff expects CDOT to grant waiver.
Question about reference of "person performing work or permittee" in terms of fines incurred: language gives
city broad discretion to fine responsible individuals, whether traffic control company or general contractor.
Question on where penalties under "Fiscal Impacts" are paid: General Fund.
Public Comment: Kurt Nordback: Acknowledges traffic engineer's need for discretion during closures, but
feels standards are missing clearly-articulated policy on equity among modes during closures or else a policy
reflecting TMP prioritization of modes (i.e. pedestrians, cyclists, transit, vehicles). 29°i Street construction an
example of inequitable treatment in which pedestrians were forced to cross a very wide street given sidewalk and
multi-use path closures while two motor vehicle lanes were left open to vehicles.
Motion (Havlick): Move that TAB recommend approval in principle the changes to the Boulder Revised Code
and Design and Construction Standards in terms of work staff has done but to include a preamble in the reface
Transportation Advismy Board
Swumany Minutes
/ May 11, 2009
Page 2 of 6
of the memo with a restatement of the TMP ("Transportation Master Plan") priorities where the pedestrian is
given the highest priority followed by cyclists, transit users, and vehicles, understanding that balance must be
achieved but hoping that that balance can favor the TMP priorities.
Discussion of motion: whether to include suggested "hierarchy of priorities" language in standards preamble, in
TMP, or elsewhere; suggestion to include language in "Intent" section of Traffic Control Plan." Issues of
"inconvenience" not the same as issues of "inequity"; staff should be able to exercise more discretion over non-
safety issues/issues of inconvenience than safety issues. Staff concern that standards need to include less legalese
and more practical information for the public in terms of internal guidance documents to explain code changes
since public rarely consults Code or DCS; confirmation that changes in standards will enable operations
personnel to understand and implement such equitable considerations because they will have to consult with the
city's traffic engineers, who are well-versed in the TMP.
Friendly amendment (Deragisch) (to be added to "Intent" section of memo): Move that TAB recommend
approval in principle the changes to the Boulder Revised Code and Design and Construction Standards in terms
of work staff has done but to include a preamble in the preface of the memo with a restatement of the TMP
("Transportation Master Plan") priorities where the pedestrian is given the highest priority followed by cyclists,
transit users, and vehicles, understanding that balance must be achieved but hoping that that balance can favor the
TMP priorities.
Intent Section:
B...and accommodates all modes of transportation...
And ensures that when roads, sidewalk and/or multi-use paths are closed due to damage (man-made or act of
nature) or construction, that pedestrians, bicycles, mobility impaired individuals and transit users are given the
same consideration as motorists. Specifically:
• All closure signage gives each group appropriate advanced notice of required detour
• Safety of each user group drives all decisions
• Inconvenience is no greater for bikes and pedestrians than motorists
Seconded: Havliek
Vote: 5-0, Motion passed.
Agenda Item 6 - Staff briefing and TAB input regarding transportation finance options.
Roskowski gave the presentation. TAB recommended adoption of amendments to the Transportation Master
Plan (TMP) at its November 17, 2008 meeting to reflect the work of the FasTracks Local Optimization Task
Force. The Complete Streets investment program identifies the highest priority transportation investments which
would be undertaken should additional funding become available. Since the beginning of 2009, TAB has been
hosting a process to explore a short list of potential funding sources and develop a report on them. A draft of the
report will be distributed to TAB prior to the board meeting on June 8th. TAB is asked to provide initial
feedback on the draft. A final drat will be brought to the board for consideration of approval at the June TAB
meeting.
Staff requests that TAB consider developing a recommendation to be included in the report. Ideally,
recommendation language would be finalized at the June meeting. Staff also requests input on two questions on
the draft report:
• Does the report provide an appropriate level of information and analysis?
• Does the report accurately and adequately communicate the process and the input received?
TAB discussion included: Feedback: Suggestion to clarify to council that TAB is well-informed on the options
and that council can turn to TAB for feedback on what TAB considers viable and non-viable options; making it
clear that TAB has considered the politics of trying to get preferred transportation finance options on the ballot
this year and that council should take action on the options now; TAB should choose which items it wants
council to move forward on in terms of the ballot, whether in the form of taxes or fees, with the understanding
that council is not likely to put these items on the ballot this November. Staff suggestion to have TAB make
recommendation more general so that preferred options still relevant and clear for council in the future and
providing more immediate specifics for council in the form of a cover letter. TAB suggestion to break out the
Transportation Advisory Board
Summary Minutes
May 11, 2009
Page 3 of 6
AgWdm ow G
TMF (transportation maintenance fee) in terms of square footage versus charging a flat fee. Suggestion to
include in a recommendation to council that TAB has studied the DET (development excise tax) and that TAB
thinks the DET is a good idea for what it is worth.
Clarifications: TAB should provide recommendation for council before May 12 Study Session. If fee option
went forward (Page 8 "Draft Executive Summary of Report"), it would need to be related to specific expenses,
but could be incremented.
Conclusions and next steps: Staff will return to TAB in June for more feedback. In the meantime, TAB Chair
asks TAB to send her comments on the immediate recommendation on preferred transportation finance options
by May 12'" prior to the council study session on June 2nd, remembering to keep the DET (the development
excise tax) in mind at June 2"' meeting. TAB will also work on the longer-term recommendation to council, with
Chair sending out a draft by the end of the week; TAB will finalize this recommendation at its next meeting.
Agenda Item 7 - Staff briefing and TAB input regarding the 2010 - 2015 Transportation Capital
Improvements Program.
Sweeney and Baird gave the presentation. Every year the city goes through a budget process that creates a six-
year planning budget, this year for the time period of 2010 through 2015. Within this process, fiords are
appropriated for the first year, 2010. The Transportation Advisory Board's (TAB) role in this process is defined
in the Boulder Revised Code (BRC) TITLE 2 GOVERNMENT ORGANIZATION, Chapter 3 Boards and
Commissions, Section 14 - Transportation Advisory Board; to review all city transportation environmental
assessments and capital improvements." It is within this context that the board is asked to hold a public hearing
and provide a recommendation on the Capital Improvements Program (CIP) to Planning Board and the City
Council.
TAB discussion included: Feedback: Discussion of examples of "sustainable" cuts in terms of staff and
services; questions on transportation department's fuel-efficient vehicle supply and acquisition: ongoing.
Clarifications: Questions on methodology for budget cuts: partly in terms of leveraging funding; TAB may
choose whether staff made the wrong choices in cuts.
Conclusions and next steps: Staff will return to TAB in June for further discussion and a final TAB
recommendation on the 2010-2015 Transportation Capital Improvements Program.
Agenda Item 8
A. Matters from Staff
• CAP/TMP Action Plan Update. Council discussed whether to raise the climate action tax at April
study session; asked staff to work with citizen's group, BCAN (Boulder Climate Action Network);
working with Chris Hagelin and others as part of a task force to brainstorm transportation component;
still deciding whether to focus on programmatic (e.g. EcoPass subsidies) versus regulatory use of funds.
Staff suggests a TAB representative attend the BCAN meetings. Driscoll part of Shanahan Neighbors
for Climate Action; using household data to promote neighborhood competition on reducing carbon
footprint; will meet with council and planning board members in May to further discuss.
• Update on 29"' Street Improvements. Staff working through fall to finalize improvements, including
multi-use path and transit stop improvements; discussion of feedback from public meetings. TAB
request to not discourage cyclists from shopping center; TAB request for more visibility for cyclists on
path; TAB request for yield signs.
• Boulder Valley Employee Survey. [Staff distributes handout]. Modal shift in non-Boulder residents
driving alone in 2008 (page 3): 80% to 74% in the last year: likely due to price of gas but also due to
regional RTD improvements. Despite problems in data collection methodology, continued downward
trend in drive-alone trips.
• Regional studies update. Amtrak project: Amtrak doing feasibility study of restoring the "Pioneer
Service" (Denver to Portland via Wyoming, Oregon, Washington); Matt Applebaum wants city to write
letter of support routing train through Boulder, Longmont and Fort Collins rather than straight through
Transportation Advisory Board
Sununaty Minutes
May 11, 2009
Page 4 oJ'6
t .
Greeley and Denver. Probably a no-brainer for council; staff will carbon copy TAB on correspondence
sent to Applebaum.
• CMAQ (Congestion, Mitigation and Air Quality) funds: Federal funds that DRCOG (Denver
Regional Council of Governments) allocates for transportation demand management every few years;
next application deadline end of May. Funds awarded to projects in terms of lowest VMTs (vehicle
miles traveled); staff still determining which projects can score well-
• Other matters. Staff will do abetter job about conveying council items through TAB first. Tracy
Winfree officially returns as Transportation Director in June. TAB Bike Tour date: May 29 or June 5.
B. Matters from Board
• 2009 Retreat summary. Conroy: Request for TAB members to look at action items and committee
suggestions for discussion at June meeting.
• Set up committees from retreat. Conroy: Will consult with Board Secretary and send the committee
assignments to TAB members before the June meeting for discussion at that meeting; Lynn
Guissinger's committee position open.
• Set up 2009 TAB Town Hall session. Conroy: Request that TAB bring potential invitees themes and
ideas for the Town Hall session to the June meeting; formalize committees not yet formalized.
Driscoll: Suggestions for invitees: Will Toor; Jennifer Finch (runs CDOT planning office), Jim
Charlier (consultant): together or separately. Havlick: Casey Jones (University of Colorado).
• Broadway/College Avenue Underpass coop safety project update. Havlick: Waiting for staff on
next steps; will then approach CU for funding.
• Proposal for CU Boulder ex-officio on TAB. Sweeney: Staff learned that because creating an ex-
officio role requires Boulder Revised Code changes, should go with alternative: unofficial
representative through town hall meetings or as needed.
• Position of Matters from Board within TAB agenda. Deragisch: Request to move Matters from
board directly after Public Comment period. TAB should drive meeting through its advice to council,
and not just serve a reactionary function. Conroy: After Public Comment but before Matters from
Staff.
Motion (Deragisch): Move that TAB restructure the agenda to put Matters from Board after all public hearing
issues are done.
Second: Havlick
Vote: 5-0, Motion passed.
• Joint informal board meetings. Conroy: Initiating informal monthly meetings for coffee with chairs
of other boards and up to two members of each board and interested staff so individual boards not
acting in such a vacuum. Deragisch/Driscoll/Moseley/Havlick: Great idea.
• Commuter-of-the-Year Event at the Peloton: Conroy: Event will take place May 12"i; Conroy to
speak. Will check in with Board Secretary to make sure TAB receiving Andrea Robbins's mails.
Agenda Item 9 - Discussion on future schedule.
• Discussed above.
Agenda Item 10-Adjournment.
Motion to adjourn: Havlick
Second: Deragisch
Vote: 5-0, Motion passed.
The meeting was adjourned at 9:03 .m.
Date, Time, and Location of Next Meeting:
The next meeting will be a regular work meeting on Monday, June 8, 2009, 1777 Broadway, Council Chambers,
at 6 .m., unless otherwise decided b staff and the board.
Approved by: Date:
Transportation Advisory Board
Summary Minutes
May 11, 2009
Page 5 of 6
*Verbatim Public comments are available in audio recordings Posted on the website.
T)-anrportatioa.4dvLS"v Board
Summary Idniutes
MaY 11, 2009
Page 6 q1-6