HomeMy WebLinkAbout06 ADOPT RESOLUTION NO. 10-01 ESTABLISHING PRIMA FACIE SPEED LIMITS ON CITY STREETS 01-19-10Agenda Item 6
• Reviewed:
AGENDA REPORT City Manager
~,:
Finance Director
MEETING DATE: JANUARY 19, 2010
TO: WILLIAM A. HUSTON, CITY MANAGER
FROM: DOUGLAS S. STACK, ACTING DIRECTOR OF PUBLIC WORKS/CITY ENGINEER
SUBJECT: ADOPTION OF RESOLUTION NO. 10-01 ESTABLISHING PRIMA FACIE
SPEED LIMITS ON CITY STREETS
SUMMARY
Adoption of Resolution No. 10-01 will establish speed limits on certain streets throughout the
City of Tustin based upon an engineering and traffic survey as required by the California
Vehicle Code.
RECOMMENDATION
It is recommended that the City Council adopt Resolution No. 10-01 establishing Prima Facie
Speed Limits on certain streets throughout the City of Tustin.
FISCAL IMPACT
Updating signs in accordance with adoption of Resolution No. 10-01 will cost approximately
$7,250. Adequate funds are available in Engineering Division Account No. 01-402-6230 (Sign
Maintenance and Striping).
BACKGROUND
Pursuant to the Califomia Vehicle Code (CVC), the City has the ability to establish prima facie
speed limits on City streets on the basis of an engineering and traffic survey. CVC Section
627 indicates that an engineering and traffic survey needs to be conducted in accordance with
methods deterrnined by the Califomia Department of Transportation (Caltrans) and shall
include, among other requirements, consideration of all of the following:
1. Prevailing speeds as determined by traffic engineering measurements;
2. Accident records; and
3. Highway, traffic, and roadside conditions not readily apparent to the driver.
Speed limit changes are due to changes in the public's driving characteristics, accident history
of the segment, and conditions not readily apparent to drivers. Standard engineering
procedures and methodologies consistent with CVC requirements have been used to conduct
the current engineering and traffic survey. Adoption of Resolution No. 10-01 establishing
speed limits based on this survey will allow continued use of radar or other electronic means
for enforcement of posted speed limits by the Tustin Police Department.
DISCUSSION
The most recent citywide speed limits were established by Resolution No. 05-13 which was
adopted by the City Council on January 17, 2005. The CVC requires that speed limits on City
Resolution No.10-01 Establishing Prima Facie Speed Limits on City Streets
January 19, 2010
Page 2
streets be justified by an engineering and traffic survey conducted within five-year periods for
police enforcement involving the use of radar or other electronic devices. This period may be
extended to seven years for officers who have taken a 24-hour course for radar certification.
The Tustin Police Department presently has eight certifi2d officers that have taken the 24-
hour course and are available for radar enforcement. Thirty four additional officers will
become available for radar enforcement when Resolution No. 10-01 is adopted.
The Public Works Department/Engineering Division, with extensive input from the Tustin
Police Department, has completed the "2010 Engineering and Traffic Survey' (attached) for
the City of Tustin and used it as the basis for establishing speed limits for 132 street segments
throughout the City. Resolution No. 10-01 (attached) recommends speed limits for all of the
surveyed streets, most of which have not changed. Table 1 (attached) indicates
recommended speed limit increases for 34 segments. One street segment in the survey
(Park Avenue between Tustin Ranch Road and District Drive) is recommended for a reduction
in speed.
Of the 34 street segments with recommended increases in speed limits, 29 segments are
increasing due to Caltrans Policy Directive No. 09-04 which became effective July 1, 2009.
The directive requires recommended speed limits to be set at the nearest 5 mph increment
above or below the critical (85~' percentile) speed. Previously, the recommended speeds
were normally set at the nearest 5 mph increment below the critical speed.
Speed limit increases could have been recommended on 26 other street segments based
upon the speed surveys alone. However, conditions not readily apparent to motorists have
been noted on these street segments as justification to retain the present posted speeds.
Such conditions include accident rates, pedestrian/bicycle activity, design speeds, adjacent
land uses, and continuity with speed limits posted on adjacent street segments.
Adjacent jurisdictions concur with the recommended speed limits on streets of shared interest.
With implementation of the speed limits recommended in Resolution No. 10-01, the Public
Works Department and Police Department are confident that the enforcement of the posted
speed limits by radar, or other electronic means, will be upheld in the courts, as they have
been with the 2005 Engineering and Traffic Survey.
S. Stack
rector of Public Works/City Engineer
Attachments: Table 1-Recommended Speed Limit Increases
Speed Limit Map (Figure 1)
Resolution No. 10-01
2010 Engineering and Traffic Survey
1
~~, s~ ~,
~_ -~
Dana R. Kasdan
Engineering Services Manager
S:\City Council Items\2010 Councl Items\Establishing prima facia speed limits Reso 10-01.doc
TABLE 1
Street Segments with Recommended Speed Limit Increases
Street Name
Se
ment Posted
Speed
Limit
Recommended
Seed Limit
B an Avenue Red Hill Avenue to Farmin ton Road 40 45''
B an Avenue Farmin ton Road to Brownin Avenue 40 45'`
Edinger Avenue W/O Newport Avenue
West Cit Limits
to
Red Hill Avenue 45 50*
EI Camino Real Main Street to New ort Avenue 25 30"
EI Camino Real New ort Avenue to Red Hill Avenue 35 40*
EI Camino Real Red Hill Avenue to Brownin Avenue 35 40"
EI Camino Real Brownin Avenue to Tustin Ranch Road 35 40"
EI Camino Real Tustin Ranch Road to M ord Road 35 40''
Herita a Wa M ord Road to B an Avenue 30 35
Holt Avenue Irvine Boulevard to New ort Avenue 25 30
Irvine Boulevard Tustin Ranch Road to Jamboree Road 45 50*
Jamboree Road Irvine Boulevard to B an Avenue 45 50
Jamboree Road B an Avenue to I-5 Cit Limit 40 45"
Kensin ton Park Dr. Valencia Avenue to Edin er Avenue 40 45'`
Main Street West Ci Limit to Williams Street 30 35''
Newport Avenue Sycamore Avenue to 1100 ft S/O
S camore Avenue 30 35'`
Newport Avenue Edinger Avenue to Del Amo Avenue/
SR-55 Ram s (40) 45"
Newport Avenue Del Amo Avenue/
SR-55 Rams
to
Valencia Avenue (40) 45"
-1-
Street Name
Se ment Posted
Speed
Limit
Recommended
Seed Limit
Old Irvine Boulevard New ort Avenue to Irvine Boulevard 30 35
Patriot Wa Pioneer Road to Jamboree Road 30 35*
Pros ect Avenue Irvine Boulevard to First Street 30 35*
Pros ect Avenue First Street to Main Street 25 30*
Red Hill Avenue EI Camino Real to Mitchell Avenue 35 40*
Red Hill Avenue Mitchell Avenue to Walnut Avenue 35 40*
Red Hill Avenue Edin er Avenue to Valencia Avenue 45 50*
Valencia Avenue Red Hill Avenue to Armstrong Avenue/
Seve ns Road (40) 45
Valencia Avenue Armstrong Avenue/
Seve ns Road to Kensington Park
Drive (40) 45
Vandenbur Lane Yorba Street to Pros ect Avenue 30 35*
Walnut Avenue New ort Avenue to Red Hill Avenue 35 40*
Walnut Avenue Red Hill Avenue to Brownin Avenue 35 40*
Yorba Street Seventeenth Street to Jacaranda Avenue 35 40
Yorba Street Jacaranda Avenue to Ama anset Wa 35 40*
Yorba Street Ama anset Wa to Irvine Boulevard 35 40'
Yorba Street Irvine Boulevard to First Street 30 35"
(40) = Speed limit currently posted on new segment, based on engineering judgment without
confirmation of Engineering and Traffic Survey.
45' = Speed limit increased due to new Caltrans Policy Directive No. 09-04 effective July 1, 2009
-2-
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% LEGACY i /1 -- - =CITY LIMITS
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~ ~; 'SO IRVINE
FIGURE 1
WILLDAN City of Tustin
Engineering ~]J98/J001/01-160 Speed Limit Map
4
RESOLUTION NO. 10-01
A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF TUSTIN,
CALIFORNIA, ESTABLISHING PRIMA FACIE SPEED LIMITS ON
CERTAIN CITY STREETS
WHEREAS, California Vehicle Code Section 22352 establishes default prima
facie speed limits for certain types of streets and highways; and
WHEREAS, California Vehicle Code Sections 22357 and 22358 provide that
local entities may make a determination, upon the basis of an engineering and traffic
survey, that a different speed limit would facilitate the orderly movement of vehicular
traffic and would be reasonable and safe; and
WHEREAS, California Vehicle Code Section 627(b) defines an engineering and
traffic survey to include a consideration of all of the following:
1. Prevailing speeds as determined by traffic engineering measurements;
2. Accident Records; and
3. Highway, traffic, and roadside conditions not readily apparent to the driver;
and
WHEREAS, the California Department of Transportation has established
methods of conducting engineering and traffic surveys as required by the California
Vehicle Code; and
WHEREAS, the City of Tustin has completed an engineering and traffic survey in
accordance with the requirements of Vehicle Code Section 627 and pursuant to Vehicle
Code Sections 22357 and 22358; and
WHEREAS, the referenced engineering and traffic survey is entitled, "2010
Engineering and Traffic Survey" prepared by Willdan Engineering for the City of Tustin,
dated December 14, 2009.
NOW, THEREFORE, BE IT RESOLVED by the City Council of the City of Tustin
as follows:
Section 1: Based upon the above referenced engineering and traffic survey, the
following speed limits are established:
StreetlSegment Speed Limit
Auto Center Drive
EI Camino Real to (South) Intersection 30
(North) Intersection to (West) Intersection 30
(West) Intersection to End of Street 30
Resolution No. 10-01
January 19, 2010
Page 2
Brownina Avenue
Bryan Avenue to EI Camino Real 40
Nisson Road to Walnut Avenue 35
Bryan Avenue
Newport Avenue to Main Street 35
Main Street to Red Hill Avenue 40
Red Hill Avenue to Farmington Road 45
Farmington Road to Browning Avenue 45
Browning Avenue to Myford Road 45
Myford Road to Jamboree Road (East City Limits) 45
Centennial Way
First Street to Main Street 25
Chambers Road
Michelle Drive to Franklin Avenue 35
Del Amo Avenue
Edinger Avenue to Newport Avenue/SR-55 Ramps 45
Dow Avenue
Franklin Avenue to Myford Road 40
Edinaer Avenue
W/O Newport Avenue (West City Limits) to Red Hill Avenue 50
Red Hill Avenue to 1500' E/O Red Hill Avenue 50
1500' E/O Red Hill Avenue to Kensington Park Drive 60
Kensington Park Drive to Jamboree Road 60
Jamboree Road to Harvard Avenue (East City Limits) 50
EI Camino Real
First Street to Main Street 25
Main Street to Newport Avenue 30
Newport Avenue to Red Hill Avenue 40
Red Hill Avenue to Browning Avenue 40
Browning Avenue to Tustin Ranch Road 40
Tustin Ranch Road to Myford Road 40
Myford Road to Jamboree Road (East City Limits) 35
First Street
W/O Tustin Avenue (West City Limits) to EI Camino Real 35
EI Camino Real to Centennial Way 35
Centennial Way to Newport Avenue 35
Newport Avenue to Charloma Drive 30
Resolution No. 10-01
January 19, 2010
Page 3
Franklin Avenue
Michelle Drive to Walnut Avenue 35
Walnut Avenue to Dow Avenue 40
Heritage Way
Tustin Ranch Road to Myford Road 35
Myford Road to Bryan Avenue 35
Holt Avenue
N/O Warren Avenue (North City Limits) to Irvine Boulevard 40
Irvine Boulevard to Newport Avenue 30
Irvine Boulevard
SR-55 Freeway (West City Limits) to Prospect Avenue 40
Prospect Avenue to Newport Avenue 40
Newport Avenue to Charloma Drive 40
Charloma Drive to Red Hill Avenue 40
Browning Avenue to Tustin Ranch Road 45
Tustin Ranch Road to Jamboree Road (East City Limits) 50
Jamboree Road
North City Limits to Pioneer Road 55
Pioneer Road to Patriot Way 55
Patriot Way to Tustin Ranch Road 55
Tustin Ranch Road to Champion Way 50
Champion Way to Irvine Boulevard 50
Irvine Boulevard to Bryan Avenue 50
Bryan Avenue to I-5 Freeway 45
OCTA/SCRRA Railway (Tustin/Irvine City Limits)
to Barranca Parkway (South City Limits) 60
Keller Drive
Robinson Drive to Jamboree Road 30
Kensington Park Drive
Valencia Avenue to Edinger Avenue 45
Main Street
West City Limits to Williams Street 35
Williams Street to Myrtle Avenue 30
Myrtle Avenue to Prospect Avenue 30
Prospect Avenue to Newport Avenue 35
Newport Avenue to Bryan Avenue 35
Resolution No. 10-01
January 19, 2010
Page 4
McFadden Avenue
West City Limits to SR-55 Freeway 35
SR-55 Freeway to Newport Avenue 35
Michelle Drive
Chambers Road to Franklin Avenue 40
Franklin Avenue to Myford Road (East City Limits) 45
Mitchell Avenue
Newport Avenue to Red Hill Avenue 30
Red Hill Avenue to Browning Avenue 30
Mvford Road
Irvine Boulevard to Bryan Avenue 40
Bryan Avenue to EI Camino Real 35
Michelle Drive to Dow Avenue 40
Newport Avenue
N/O Warren Avenue (North City Limits) to Old Irvine Boulevard 45
Old Irvine Boulevard to Bryan Avenue 40
Bryan Avenue to EI Camino Real 35
EI Camino Real to Sycamore Avenue 35
Sycamore Avenue to 1,100 Ft S/O Sycamore Avenue 35
Edinger Avenue to Del Amo Avenue/SR-55 Ramps 45
Del Amo Avenue/SR-55 Ramps to Valencia Avenue 45
Nisson Road
Pasadena Avenue to "B" Street 35
Newport Avenue to Red Hill Avenue 35
Red Hill Avenue to Browning Avenue 35
Old Irvine Boulevard
Newport Avenue to Irvine Boulevard 35
Park Avenue
Wamer Avenue to District Drive 30
District Drive to Tustin Ranch Road 30
Parkcenter Lane
Tustin Ranch Road to Bryan Avenue 35
Bryan Avenue to EI Camino Real ~ 30
Pasadena Avenue
McFadden Avenue to Sycamore Avenue 30
Resolution No. 10-01
January 19, 2010
Page 5
Patriot Wav
Pioneer Road to Jamboree Road (East City Limits) 35
Pioneer Road
Jamboree Road to Patriot Way 40
Patriot Way to Peters Canyon Road 40
Peters Canyon Road to Pioneer Way 35
Pioneer Wav
Tustin Ranch Road to Pioneer Road 30
Portola Parkway
Tustin Ranch Road to Jamboree Road (East City Limits) 40
Prospect Avenue
Anglin Lane (North City Limits) to Seventeenth Street 40
Seventeenth Street to Amaganset Way 40
Amaganset Way to Irvine Boulevard 40
Irvine Boulevard to First Street 35
First Street to Main Street 30
Red Hill Avenue
N/O Irvine Boulevard (North City Limits) to Bryan Avenue 40
Bryan Avenue to EI Camino Real 40
EI Camino Real to Mitchell Avenue 40
Mitchell Avenue to Walnut Avenue 40
Walnut Avenue to Sycamore Avenue 40
Sycamore Avenue to Edinger Avenue 40
Edinger Avenue to Valencia Avenue 50
Valencia Avenue to Warner Avenue 50
Warner Avenue to Barranca Parkway (South City Limits) 50
Robinson Drive
Irvine Boulevard to Jamboree Road (East City Limits) 35
San Juan Street
Newport Avenue to Red Hill Avenue 30
Red Hill Avenue to Browning Avenue 30
Seventeenth Street
SR-55 Freeway (West City Limits) to Yorba Street (North) 40
Yorba Street (North) to Prospect Avenue (North) (East City Limits) 40
Sycamore Avenue
Newport Avenue to Red Hill Avenue 30
Resolution No. 10-01
January 19, 2010
Page 6
Tustin Ranch Road
Jamboree Road to Rawlings Way 50
Rawlings Way to La Colina Drive 50
La Colina Drive to Irvine Boulevard 45
Irvine Boulevard to Bryan Avenue 45
Bryan Avenue to I-5 Freeway 40
I-5 Freeway to Walnut Avenue 50
Wamer Avenue to Park Avenue 50
Park Avenue to Barranca Parkway 50
Valencia Avenue
Newport Avenue to Red Hill Avenue 45
Red Hill Avenue to Armstrong Avenue/Severyns Road 45
Armstrong Avenue/Severyns Road to Kensington Park Drive 45
Vandenberg Lane
Yorba Street to Prospect Avenue 35
Walnut Avenue
Newport Avenue to Red Hill Avenue 40
Red Hill Avenue to Browning Avenue 40
Browning Avenue to Tustin Ranch Road 40
Tustin Ranch Road to Myford Road (East City Limits) 40
Warner Avenue
Tustin Ranch Road to Park Avenue 30
Williams Street
Main Street to McFadden Avenue 30
Yorba Street
S/O Santa Clara Avenue (North City Limits)
to Seventeenth Street 40
Seventeenth Street to Jacaranda Avenue 40
Jacaranda Avenue to Amaganset Way 40
Amaganset Way to Irvine Boulevard 40
Irvine Boulevard to First Street 35
Resolution No. 10-01
January 19, 2010
Page 7
Section 2: The speed limits established in Section 1 shall be effective when
appropriate signs giving notice thereof are erected upon the street.
PASSED AND ADOPTED at a regular meeting of the City Council of the City of
Tustin held on the 19~h day of January 2010.
Jerry Amante
Mayor
ATTEST:
PAMELA STOKER
City Clerk
crlt~JiJi~~ll~l~i airy f~I~riJL ~U~YcY
For
The City of Tustin
~~»
WI LLDAN
Engineering December 14, 2009
1W1 LLDAN I Y Vending
Engineering reacn
December 14, 2009
Mr. Dana R. Kasdan, P.E.
Engineering Services Manager
Public Works Department
City of Tustin
300 Centennial Way
Tustin, CA 92780
Subject: 2010 Engineering and Traffic Survey
Dear Mr. Kasdan:
As requested, Willdan has completed an Engineering and Traffic Survey (E&TS) to
justify and update the posted speed limits along 132 street segments in the City of
Tustin. The previous Citywide survey was approved in January 2005 and now requires
an update to comply with the 5-year limitation set forth in the Califomia Vehicle Code
(CVC).
We are pleased to submit the enclosed report that describes the E&TS procedures and
contains recommendations for posted speed limits on the City's arterial and collector
street system. A summary of these recommendations is included in the analysis.
Supporting documentation for each speed zone recommendation is provided in the
Appendices.
The E&TS was conducted in accordance with the applicable provisions of the Califomia
Vehicle Code (CVC), following procedures outlined in the California Manual on Uniform
Traffic Control Devices (CA MUTCD) dated September 2006, and as requi red by Section
627 of the California Vehicle Code. The report is intended to satisfy the requirements of
Section 40802 of the CVC to enable the continued use of radar or other electronic
devices for traffic speed enforcement.
We appreciate the opportunity to serve the City of Tustin and the assistance and
cooperation afforded to us during the course of t his study.
Very truly yours,
WILLDAN ENGINEERING
~~ Lk. ~Y,~t--
Ruth Smith, TE, PTP
Project Engineer
Enclosure
Engineering ~ Geotechnical ~ Environmental ~ Sustainability ~ Financial ~ Homeland Security
714.978.8200 ~ 800.424.9144 ~ fax: 714.978.8299 ~ 2401 East Katella Avenue, Suite 450, Anaheim, CA 92806-6073 ~ www.willdan.com
TABLE OF CONTENTS
Page
PUBLIC WORKS DEPARTMENT CERTIFICATION ................................... ii
TRAFFIC ENGINEER'S CERTIFICATION .................................................. iii
EXECUTIVE SUMMARY ............................................................................. 1-4
Figure 1-Map of Recommended Speed Limits ........................................... 4
INTRODUCTION .......................................................................................... 5-7
Elements of the Engineering and Traffic Survey ........................................ 6-7
Measurement of Prevailing Speed .......................................................... 6
Accident History ..................................................................................... 6
Conditions Not Readily Apparent to Motorists ........................................ 7
Recent Changes to the Engineering and Traffic Survey ............................. 7
SURVEY CONDITIONS ............................................................................... 8-9
Survey Locations ........................................................................................ 8
Data Collection ........................................................................................... 8-9
Field Review Data ...................................................................................... 9
ANALYSIS &RESULTS .............................................................................. 10-25
Analysis ...................................................................................................... 10
New Street Segments ................................................................................ 10-11
Results and Recommendations ................................................................. 11-12
Segments with Special Conditions ............................................................. 12-17
Table 1-Summary of Recommendations ................................................ 18-24
Table 2-Segments With Higher Recommended Speed Limits ................ 25
LEGISLATIVE REFERENCES .................................................................... 26-31
Applicable Sections of 2009 California Vehicle Code ................................. 26-31
CALTRANS REFERENCES ........................................................................ 32-48
Applicable Sections of CA Manual on Uniform Traffic Control Devices...... 32-41
Traffic Operations Policy Directive 09-04 .................................................. 42-48
APPENDIX A -Street Segment Data Sheets
APPENDIX B -Radar Speed Survey Distribution Forms
APPENDIX C -Collision Rates
APPENDIX D -Survey Equipment Used
Willdan Engineering 2010 Engineering and Traffic Survey
1 73 9813001 /0 1-4 60 i City of Tustin
CITY OF TUSTIN
PUBLIC WORKS DEPARTMENT
ENGINEERING DIVISION CERTIFICATION
I, Dana R. Kasdan, have examined and reviewed the following Engineering and Traffic
Survey dated December 14, 2009, for the City of Tustin. I find that this study follows the
procedures established by the Califomia Vehicle Code (CVC) and the State of Califomia
Department of Transportation (Caltrans) California Manual on Uniform Traffic Control
Devices in order to establish speed limits. Further, I find that this study follows standard
traffic engineering guidelines and practices and, therefore, is within the policies of the City
of Tustin. I certify that this study has been conducted under my direction and that I am
experienced in surveys of this type and that I am duly registered in the State of California
as a professional Civil and Traffic Engineer.
~~
Dana R. Kasdan, P.E., T.E. Date
Engineering Services Manager
RCE 30559, Exp. 3-31-10
RTE 1202, Exp. 9-30-10
~O Q ROf ESS/p~,~~ O QRpFESSiO~
~~~P~PR 5~~9 Fyc y pQ~P~ 3p~
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No. 30559 7~ ~
Exp. 3/31//0 * Exp ~ ~ ~~
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C
Civil Engineering Seal Traffic Engineering Seal
Willdan Engineering 2010 Engineering and Traffic Survey
17398/3001/01-460 11 City Of TUStIn
TRAFFIC ENGINEER'S CERTIFICATION
I, Ruth Smith, do hereby certify that this Engineering and Traffic Survey dated December
14, 2009, was prepared in accordance with procedures established by the California
Vehicle Code (CVC) and the State of California Department of Transportation (Caltrans)
California Manual on Uniform Traffic Control Devices in order to establish speed limits.
This Engineering and Traffic Survey contains recommended speed limits for 132 roadway
segments in the City of Tustin and was prepared under my supervision and is accurate and
complete. I certify that I am experienced in performing surveys of this type and that I am
duly registered in the State of California as a professional Traffic Engineer.
`fZcc.~bt.. Var. ,~i-u;~_
Ruth Smith, T.E.
Project Manager
RTE 1650, Exp. 9/30/10
12-14-2009
Date
Traffic Engineering Seal
Willdan Engineering 2010 Engineering and Traffic Survey
17398/3001/01-460 iii City of Tustin
EXECUTIVE SUMMARY
This Engineering and Traffic Survey (E&TS) is intended to be the basis for the
establishment, revision, and enforcement of speed limits for selected streets within the City
of Tustin. This Engineering and Traffic Survey presents recommended speed limits for 132
street segments in the City of Tustin. An Engineering and Traffic Survey is required by the
State of California to establish intermediate speed limits on local streets and to enforce
those limits using radar or other speed measuring devices. This Survey must be updated
every 5 or 7 years to ensure the speeds reflect current conditions as dictated by the
California Vehicle Code (CVC). The CVC also requires that the Survey be conducted
based on the methodology required by The California Manual on Uniform Traffic Control
Devices (CA MUTCD) dated September 2006.
The previous Citywide survey was approved in January 2005. The City requested the new
survey for the proper posting of speed limits and to enable the Police Department to utilize
radar or other electronic speed measuring devices for speed enforcement. The
Engineering and Traffic Survey was conducted in accordance with procedures outlined in
the California Manual on Uniform Traffic Control Devices (CA MUTCD) dated September
2006, Caltrans Policy Directive 09-04, and as required by Section 627 of the California
Vehicle Code.
ELEMENTS OF THE ENGINEERING AND TRAFFIC SURVEY
The California Manual on Uniform Traffic Control Devices (CA MUTCD) dated September
2006 specifies the methodology to be used for completing an Engineering and Traffic
Survey. This methodology includes an evaluation of current vehicle speeds, accident
history and conditions not readily apparent to motorists. The three basic elements of the
Engineering and Traffic Survey are measurement of prevailing speed, accident history, and
conditions not readily apparent to motorists.
The 85th percentile speed is the speed at or below which 85 percent of the traffic travels.
This threshold represents what is historically found to be a safe and reasonable speed for
most drivers based on common roadway conditions. Therefore, a "basic speed limit" is
established at the nearest 5-mile per hour (mph) increment to the 85th percentile speed.
For example, if the 85th percentile speed is 48 mph, the basic speed limit is 50 mph. If the
85th percentile speed is 47 mph, the basic speed limit is 45 mph. Reported collisions are
reviewed for each street segment to determine if there is a higher than average rate of
collisions. A segment that has an above-average collision rate typically suggests
conditions that are not readily apparent to motorists. Each street segment is field inspected
to identify roadway conditions that may not be readily apparent to motorists. A
determination is made whether any conditions are significant and warrant the
recommendation of setting the speed limit 5 mph below the basic speed limit.
Willdan Engineering 2010 Engineering and Traffic Survey
17398/3001/01-460 1 City of Tustin
It should be noted that State of California requirements for determining speed limits have
changed since the previous Engineering and Traffic Survey was conducted, and this has
resulted in higher recommended speed limits on many of the City streets. Previously,
speed limits in California were set at the nearest 5 mph increment below the critical speed
(85th percentile speed). The speed limit could be lowered an additional 5 mph if there was
a high collision rate or conditions not readily apparent to motorists were present.
Therefore, the speed limit was set below the critical speed, by as much as 10 mph.
Previously, a critical speed of 38, 39 or even 40 mph would result in a speed limit of 35
mph, with the possibility of it being lowered to 30 mph. Currently, these critical speeds
would result in speed limits of 40 mph, with the possibility of being reduced to no lower than
35 mph.
SURVEY CONDITIONS
Survey locations were selected based on minimum stop sign and traffic signal influence,
minimum visibility restrictions, non-congested traffic flow away from intersections and
driveways, and minimum interference from curves or other roadway conditions that would
affect the normal operation of a vehicle.
Data was collected reflecting existing conditions, including the prevailing speed of vehicles,
traffic collisions, visibility restrictions, and roadway conditions within the community. Speed
data and field reviews were conducted at 132 locations during the months of August and
September 2009. Collision data for each segment for the latest 3 years of reported
accidents was obtained from the City's electronic database. Daily traffic volumes, collected
in 2008, were provided by the City of Tustin. The collision rate in collisions per million
vehicle miles (Col/MVM) was calculated for each segment, using the number of collision,
the daily traffic volumes and the segment lengths. The collision rates were compared to
the statewide average for similar roadways to determine if the segments had greater than
normal collision rates.
The field review of each segment also noted pedestrian/bicycle activity, roadway
geometrics, the frequency of intersections, driveways and on-street parking, location of
traffic control devices, visibility obstructions, land use and proximity to schools and parks,
speed limits of adjacent segments in neighboring jurisdictions, and any other conditions not
readily apparent to the driver.
ANALYSIS & RESULTS
The 2010 Engineering and Traffic Survey included 13 new/modified street segments in and
around Tustin Legacy, that were not previously surveyed in 2005. Interim speed limits had
been posted on most of the new street segments, based on engineering judgment.
The survey data for the 132 segments was compiled and analyzed to determine the
recommended speed limit for each segment, in accordance with the critieria contained in
the California Manual on Uniform Traffic Control Devices (CA MUTCD), dated September
2006, and in Caltrans Policy Directive 09-04. The criteria included the 85th percentile
speed, the 10 mph pace speed, the collision rate and conditions not readily apparent to the
Willdan Engineering 2010 Engineering and Traffic Survey
17398/3001/01-460 2 City of Tustin
motorist. Figure 1 (at the end of this section) illustrates all of the recommended speed
limits, including the new segments, on a City map and indicates the recommended
changes.
Of the 132 surveyed segments, 34 segments are recommended for an increase in the
posted speed limit. It should be noted that the speed limits for 29 of these 34 segments are
being increased directly as a result of the new Caltrans Policy Directive No. 09-04. Three
segments are recommended to have a speed limit greater than the basic speed limit in
order to preserve continuity. A lower speed limit is recommended for one segment, which
is one of the new street segments with an interim speed limit based on engineering
judgment.
Based on the review of special conditions, 26 of the surveyed segments have
recommended speed limits that are 5 mph below where it would normally be set due to the
85th percentile speed. The speed limits were lowered for these 26 segments due to
conditions not readily apparent to the drivers. The special conditions justifying the modified
speed limits are provided for each segment.
LEGISLATIVE AND CALTRANS REFERENCES
Applicable sections of the California Vehicle Code and California Manual on Uniform Traffic
Control Devices are provided in the report. These include the basic speed law, prima facie
speed limits, the increase of local speed limits, downward speed zoning, speed traps, and
the requirements of an Engineering and Traffic Survey.
Willdan Engineering 2010 Engineering and Traffic Survey
17398/3001/01-460 3 City of Tustin
CITY
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LEGEND
=STREET WITH POSTED SPEED LIMIT
- - =CITY LIMITS
30 =MAINTAIN SPEED LIMIT (MPH)
(40) =INCREASE SPEED LIMIT (MPH)
" =BASED ON COUNTY OF ORANGE
`" = BASED ON CITY OF SANTA ANA
'"' =BASED ON CITY OF IRVINE
""` =BASED ON CITY OF ORANGE
NP =SPEED LIMIT NOT POSTED
(IN THE CITY OF IRVINE)
FIGURE 1
City of Tustin
Speed Limit Map
INTRODUCTION
This Engineering and Traffic Survey is intended to be the basis for the establishment,
revision, and enforcement of speed limits for selected streets within the City of Tustin. This
Engineering and Traffic Survey presents recommended speed limits for 132 street
segments in the City of Tustin. An Engineering and Traffic Survey is required by the State
of California to establish intermediate speed limits on local streets and to enforce those
limits using radar or other speed measuring devices. This Survey must be updated every 5
or 7 years to ensure the speeds reflect current conditions as dictated by the California
Vehicle Code (CVC). The CVC also requires that the Survey be conducted based on the
methodology required by The California Manual on Uniform Traffic Control Devices (CA
MUTCD) dated September 2006.
The survey was requested by the City for the proper posting of speed limits and to enable
the Police Department to utilize radar or other electronic speed measuring devices for
speed enforcement. CVC Sections 40801 and 40802 require that an Engineering and
Traffic Survey verify the prima facie speed limit before enforcement by such a device is
legal. The law further specifies that these surveys be conducted every 5 years. The
surveys can be extended to 7 years provided the City's police officer(s) have completed a
24-hour radar operator course [CVC 40802(c)(2)(B)(i)(I)]. Additionally, some surveys may
be extended to 10 years if a traffic engineer certifies that no changes in roadway or traffic
conditions have occurred [CVC 40802 (c)(2)(B)(i)(II)]. These provisions assure that posted
speed limits are kept reasonably current.
The Engineering and Traffic Survey for the City was conducted in accordance with
procedures outlined in the California Manual on Uniform Traffic Control Devices (CA
MUTCD) dated September 2006 and as required by Section 627 of the California Vehicle
Code. The Code further describes three elements of an Engineering and Traffic Survey:
1. Prevailing speed as determined by traffic engineering measurements
2. Collision records
3. Highway, traffic, and roadside conditions not readily apparent to the driver
Posted speed limits are established primarily to protect the general public from the reckless
and unpredictable behavior of dangerous drivers. They provide law enforcement with a
clearly understood method of identifying and apprehending violators of the basic speed law
(CVC Section 22350). This law states that "No person shall drive a vehicle on a highway at
a speed greater than is reasonable or prudent having due regard for weather, visibility, the
traffic on, and the surface and width of the highway, and in no event at a speed which
endangers the safety of persons or property." The posted speed limit gives motorists a
clear warning of the maximum speed that is reasonable and prudent under typical driving
conditions.
Willdan Engineering 2010 Engineering and Traffic Survey
1739813001/01-460 5 City of Tustin
The basic fundamentals for establishing speed limits recognize that the majority of drivers
behave in a safe and reasonable manner, and therefore, the normally careful and
competent actions of a reasonable driver should be considered legal. Speed limits
established on these fundamentals conform to the consensus that those who drive the
highway determine what speed is reasonable and safe, not on the judgment of one or a few
individuals. A radar speed study is usually used to record the prevailing speed of
reasonable drivers.
Speed limits are also established to advise drivers of conditions which may not be readily
apparent to a reasonable driver. For this reason, accident history, roadway conditions,
traffic characteristics, and land use must also be analyzed before determining speed limits.
Speed limit changes are usually made in coordination with physical changes in roadway
conditions or roadside developments. Unusually short zones of less than one-half mile in
length should be avoided to reduce driver confusion.
Additionally, it is generally accepted that speed limits cannot be successfully enforced
without voluntary compliance by a majority of drivers. Consequently, only the driver whose
behavior is clearly out of line with the normal flow of traffic is usually targeted for
enforcement.
ELEMENTS OF THE ENGINEERING AND TRAFFIC SURVEY
The California Manual on Uniform Traffic Control Devices (CA MUTCD) dated September
2006 specifies the methodology to be used for completing an Engineering and Traffic
Survey. This methodology includes an evaluation of current vehicle speeds, accident
history and conditions not readily apparent to motorists. The basic elements of the
Engineering and Traffic Survey are discussed in more detail as follows:
Measurement of Prevailing Speed
Existing vehicle speeds are surveyed by a certified radar operator with a calibrated radar
unit in an unmarked vehicle. Speed samples are taken for each segment representing a
statistically significant sample of current traffic. This data is then evaluated to identify the
distribution of speeds. A key element in the evaluation is the identification of the 85th
percentile speed. The 85~h percentile speed is the speed at or below which 85 percent of
the traffic travels. This threshold represents what is historically found to be a safe and
reasonable speed for most drivers based on common roadway conditions. Therefore, a
"basic speed limit" is established at the nearest 5-mile per hour (mph) increment to the 85th
percentile speed. For example, if the 85th percentile speed is 48 mph, the basic speed limit
is 50 mph. If the 85th percentile speed is 47 mph, the basic speed limit is 45 mph.
Accident History
Reported collisions are reviewed for each street segment to determine if there is a higher
than average rate of collisions. A segment that has an above-average collision rate
typically suggests conditions that are not readily apparent to motorists.
Willdan Engineering 2010 Engineering and Traffic Survey
17398/3001/01-460 6 City of Tustin
A summary of the collision rates for the 132 surveyed street segments is provided in
Appendix B.
Conditions Not Readily Apparent To Motorists
Each street segment is field inspected to identify roadway conditions that may not be
readily apparent to motorists. A determination is made whether any conditions are
significant and warrant the recommendation of setting the speed limit 5 mph below the
basic speed limit. It is important to note that The California Manual on Uniform Traffic
Control Devices (CA MUTCD) dated September 2006 recommends exercising great care
when establishing speed limits 5 mph below the basic speed limit.
RECENT CHANGES TO THE ENGINEERING AND TRAFFIC SURVEY
It should be noted that State of California requirements for determining speed limits have
changed since the previous Engineering and Traffic Survey was conducted, and this has
resulted in higher recommended speed limits on a substantial number of the City streets.
Previously, speed limits in California were set at the nearest 5 mph increment below the
critical speed (85th percentile speed). The speed limit could be lowered an additional 5
mph if there was a high collision rate or conditions not readily apparent to motorists were
present. Therefore, the speed limit was set below the critical speed, by as much as 10
mph.
As previously noted, the CA MUTCD now requires that the speed limit be set at the nearest
critical speed, either below or above it, with the possibility of lowering the speed limit 5 mph
for the reasons noted above. For example, previously, a critical speed of 38, 39 or even 40
mph would result in a speed limit of 35 mph, with the possibility of it being lowered to 30
mph. Currently, these critical speeds would result in speed limits of 40 mph, with the
possibility of being lowered to 35 mph.
The California Manual on Uniform Traffic Control Devices (CA MUTCD) dated September
2006 specifies the methodology to be used for completing an Engineering and Traffic
Survey. This methodology includes an evaluation of current vehicle speeds, accident
history and conditions not readily apparent to motorists. The basic elements of the
Engineering and Traffic Survey are discussed in more detail as follows:
Willdan Engineering 2010 Engineering and Traffic Survey
17398/3001101-460 7 City of Tustin
SURVEY CONDITIONS
SURVEY LOCATIONS
The procedures described below describe the criteria and methods used to survey selected
streets within the City of Tustin. The specific location of the radar speed survey for each
street segment was selected after considering the following:
1. Minimum stop sign and traffic signal influence
2. Minimum visibility restrictions
3. Non-congested traffic flow away from intersections and driveways
4. Minimum influence from curves or other roadway conditions that would affect
the normal operation of a vehicle
DATA COLLECTION
Data regarding the existing conditions was collected, including the prevailing speed of
vehicles, traffic collisions, visibility restrictions, and roadway conditions within the
community. Speed data and field reviews were conducted at 132 locations during the
months of August and September 2009.
Speed Data
Radar speed measurements were conducted at 132 locations during August 2009. All
surveys were conducted in good weather conditions, during off-peak hours on weekdays.
The radar unit was operated from an unmarked vehicle to minimize any influence on driver
behavior. Typically, a minimum sample size of 100 vehicles or the total samples during a
maximum period of 2 hours were obtained for each segment. Traffic speeds in both
directions were recorded for individual segments and separate surveys were made for
divided roadways.
Collision Data
Collision data was obtained from the Statewide Integrated Traffic Record System
(SWITRS) which is an electronic collision database. For this study, collision data was used
from the latest three years of reported accidents, from January 1, 2006 to December 31,
2008. The collision rates for the 132 segments are expressed in accidents per million
vehicle miles (A/MVM). Daily traffic volumes, collected in 2008, were provided by the City
of Tustin. This information was then entered into the following formula to determine the
collision rate:
R=
Ax1,000,000
tx365 days xlxv
year
Willdan Engineering 2010 Engineering and Traffic Survey
17398/3001/01-460 8 City of Tustin
Where:
R =Collision Rate (accidents/million vehicle miles)
A =Number of midblock collisions over time period
t =Time Period Covered (in years)
I =Length of Segment (miles)
v =Traffic Volume (average daily traffic)
The segment collision rate was then compared to the average statewide collision rate for
similar roadways. The latest available average statewide collision rates were obtained from
2007 Collision Data on California State Highways, published by the State of California.
Field Review Data
A field review was conducted for each of the selected street segments in the City with
consideration for the following factors:
1. Street width and alignment (design speed)
2. Pedestrian activity and traffic flow characteristics
3. Number of lanes and other channelization and striping patterns
4. Frequency of intersections, driveways, and on-street parking
5. Location of stop signs and other regulatory traffic control devices
6. Visibility obstructions
7. Land use and proximity to schools
8. Pedestrian and bicycle usage
9. Uniformity with existing speed zones and those in adjacent jurisdictions
10. Any other unusual condition not readily apparent to the driver
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17398/3001/01-460 9 City of Tustin
ANALYSIS & RESULTS
ANALYSIS
Survey data was compiled and analyzed to determine the recommended speed limit in
accordance with several criteria contained in the California Manual on Uniform Traffic
Control Devices (CA MUTCD) dated September 2006. Some of the criteria used were:
A. The critical speed or 85th percentile speed is that speed at or below which 85
percent of the traffic is moving. This speed is the baseline value in determining what
the majority of drivers believe is safe and reasonable. Speed limits set much higher
than the critical speed are not considered reasonable and safe. Speed limits set
much lower than the critical speed make a large number of reasonable drivers
"unlawful," and do not facilitate the orderly flow of traffic. The "basic speed limit" is
the 5 mph increment closest to the 85'h percentile speed.
B. The 10 mile per hour (mph) pace speed is the 10 mph increment that contains the
highest percentage of vehicles. It is a measure of the dispersion of speeds across
the range of the samples surveyed. An accepted practice is to keep the speed limit
within the 10 mph pace while considering the critical speed and other factors that
might indicate a speed lower than the critical speed.
C. The collision rate for each street segment is compared to average collision rates that
can be reasonably expected to occur on similar streets and highways in other
jurisdictions, in proportion to the volume of traffic per lane mile. These average
collision rates have been developed by the State of California and are considered
reasonable for use in the City of Tustin.
NEW STREET SEGMENTS
Subsequent to the 2005 Engineering and Traffic Surrey, several new street segments in
the City of Tustin have been constructed or modified in and around Tustin Legacy, which
was formerly occupied by the Tustin Marine Corp Air Station. This has resulted in the
addition of the 13 new/modified street segments listed below since the last Engineering and
Traffic Survey was performed. Since another Engineering and Traffic Survey was due,
interim speed limit signs were posted on most of the new road segments, with the speed
limits based on engineering judgment.
1. Tustin Ranch Road from Warner Avenue to Park Avenue
2. Tustin Ranch Road from Park Avenue to Barranca Parkway
3. Park Avenue from Warner Avenue to District Drive
4. Park Avenue from District Drive to Tustin Ranch Road
5. Warner Avenue from Tustin Ranch Road to Park Avenue
6. Valencia Avenue from Newport Avenue to Red Hill Avenue
Willdan Engineering 2010 Engineering and Traffic Survey
1739813001/01-460 10 City of Tustin
7. Valencia Avenue from Red Hill Avenue to Armstrong Road/Severyns Road
8. Valencia Avenue from Armstrong Road/Severyns Road to Kensington Park
Drive
9. Kensington Park Drive from Valencia Avenue to Edinger Avenue
10. Newport Avenue from Edinger Avenue to Del Amo Avenue/SR-55 Ramps
11. Newport Avenue from Del Amo Avenue/SR-55 Ramps to Valencia Avenue
12. Del Amo Avenue from Edinger Avenue to Newport Avenue/SR-55 Ramps
(replaces the segment from Edinger Avenue to Valencia Avenue since Del
Amo Avenue no longer extends to Valencia Avenue and now terminates at
Newport Avenue/SR-55 Ramps)
RESULTS AND RECOMMENDATIONS
The Legislature, in adopting Section 22358.5 of the California Vehicle Code (CVC), has
made it clear that physical conditions, such as width, curvature, grade and surtace
conditions, or any other condition readily apparent to a driver, in the absence of other
factors, would not be the basis for special downward speed zoning. In these cases, the
basic speed law (CVC Section 22350) is sufficient to regulate such conditions.
The recommendations contained in this Report are intended to establish prima facie speed
limits. They are not intended to be absolute for all prevailing conditions. All prima facie
speed violations are actually violations of the basic speed law (Section 22350 of California
Vehicle Code). This statute states that a person shall not drive a vehicle at a speed greater
than is safe having regard for traffic, roadway, and weather conditions. A prima facie limit
is intended to establish a maximum safe speed under normal conditions.
The Engineering and Traffic Survey Forms (Appendix A) illustrate the results of a thorough
evaluation of the available data, and recommend a speed limit for each street segment
surveyed. Table 1 (at the end of this section) summarizes the results and
recommendations for all 132 surveyed segments.
The recommended speed limit for each segment is consistent with the prevailing behavior
as demonstrated by the radar speed measurements. Typically, a speed limit in the upper
range of the 10-mile pace was selected unless a collision rate significantly higher than
expected was discovered or roadway conditions not readily apparent to the driver were
identified. Any segments with recommended speed limits 5 mph below or above the basic
speed limit are fully explained later in this section.
Of the 132 surveyed segments, 34 segments are recommended for an increase in the
posted speed limit, as listed in Table 2 (at the end of this section). Table 2 also indicates
the 29 segments having increased speed limits due to the new Caltrans Policy Directive
No. 09-04. Three segments are recommended to have a speed limit greater than the basic
willdan Engineering 2010 Engineering and Traffic Survey
17398/3001/01-460 11 City of Tustin
speed limit in order to preserve continuity with adjacent street segments (two within
adjacent jurisdictions). These three segments are Prospect Avenue from Anglin Lane
(North City Limit with Orange County) to 17th Street, 17th Street from SR-55 (West City
Limit with Santa Ana) to Yorba Street North, and Yorba Street from 17th Street to
Jacaranda Avenue, as identified in Table 1. A lower speed limit is recommended for one
street segment, Park Avenue from District Drive to Tustin Ranch Road. This segment is
one of the new street segments within Tustin Legacy, with an interim posted speed limit
based on engineering judgment unconfirmed by an Engineering and Traffic Survey.
SEGMENTS WITH SPECIAL CONDITIONS
The 132 street segments were reviewed through a field inspection to identify whether
conditions not readily apparent to motorists exist. Conditions not readily apparent to
motorists include high accident rates; the design speed of the road; continuity between
speed zones; on-street parking on relatively narrow streets that could block the view of
pedestrians crossing the street or block the sight distance of motorists entering the
roadway from cross streets or driveways, and high-activity land uses adjacent to the road.
The presence of pedestrians and/or bicycles is also recognized by California law as a
reason for setting the speed limit 5 mph below the basic speed limit. A determination was
made whether these conditions are present and significant enough to warrant
recommending the speed limit to be placed at five mph below the basic speed limit. It is
important to note that the State of California recommends exercising great care when
establishing speed limits more than 5 mph below the 85th percentile speed.
Based on the review of special conditions, 26 surveyed street segments have
recommended speed limits that are 5 miles per hour (mph) below the basic speed limit, due
to conditions not readily apparent to the drivers. The special conditions justifying the
modified speed limits are discussed below for each of these segments.
Segment #12: Centennial Way -First Street to Main Street
This segment is currently posted at 25 mph and has 1 through lane in each direction, with
an ADT of 4,894 vehicles per day. The adjacent land use is commercial, with some
residential, and the City of Tustin's Civic Center. The critical speed is 29 mph, which would
normally justify a 30 mph posted speed limit. However, due to the high number of
pedestrians, on-street-parking, and numerous driveways, a lower speed limit would be
prudent. It is recommended that the speed limit remain at 25 mph for the reasons given
above.
Segment #30: First Street -Centennial Way to Newport Avenue
This segment is currently posted at 35 mph and has 2 through lanes in each direction, with
an ADT of 14,393 vehicles per day. The adjacent land use is a mix of commercial and
office park. The critical speed is 39 mph, which would normally justify a 40 mph posted
speed limit. However, due to the heavy cross-traffic, a moderate number of pedestrians, a
bus layover area, and a high density of driveways, a lower speed limit would be prudent. It
is recommended that the speed limit remain at 35 mph for the reasons given above.
Willdan Engineering 2010 Engineering and Traffic Survey
17398!3001/01-460 12 City of Tustin
Segment #31: First Street -Newport Avenue to Charloma Drive
This segment is currently posted at 30 mph and has 1 through lane in each direction with
an ADT of 4,688 vehicles per day. The adjacent land use is a mix of commercial and
residential. The critical speed is 33 mph, which would normally justify a 35 mph posted
speed limit. However, due to the high density of driveways and the difficulty in exiting the
driveways due to sight distance, a lower speed limit would be prudent. It is recommended
that the speed limit remain at 30 mph for the reasons given above.
Segment #36: Holt Avenue - N/O Warren Avenue (North City Limit) to Irvine Blvd.
This segment is currently posted at 40 mph and has 2 through lanes in each direction, with
no left turn pockets, and an ADT of 7,641 vehicles per day. The adjacent land use is
residential. The critical speed is 43 mph, which would normally justify a 45 mph posted
speed limit. However, due to high number of pedestrians and bicyclists, the uncontrolled
school crosswalk at Warren Ave., the on-street-parking, the heavy concentration of
driveways and street intersections, and to maintain continuity with the adjacent segment in
the County of Orange, a lower speed limit would be prudent. It is recommended that the
speed limit remain at 40 mph for the reasons given above.
Segment #38: Irvine Boulevard -State Route 55 (West City Limit) to Prospect Ave.
This segment is currently posted at 40 mph and has 3 through lanes in each direction with
an ADT of 26,148 vehicles per day. The adjacent land use is commercial. The critical
speed is 43 mph, which would normallyjustify a 45 mph posted speed limit. However, due
to bus stops, pedestrian and bicycle usage, and a heavy concentration of driveways, and to
maintain continuity with the posted speed limit of 40 mph on the adjacent street segment in
the City of Santa Ana, a lower speed limit would be prudent. It is recommended that the
speed limit remain at 40 mph for the reasons given above.
Segment #48: Jamboree Road -Champion Way to Irvine Boulevard
This segment is currently posted at 50 mph and has 3 through lanes in each direction with
an ADT of 22,215 vehicles per day. The adjacent land use is residential (none fronting).
The critical speed is 53 mph, which would normally justify a 55 mph posted speed limit.
However, due to the sports park adjacent to the road and to maintain continuity with the
adjacent roadway segments, a lower speed limit would be prudent. It is recommended that
the speed limit remain at 50 mph for the reasons given above.
Segment #52: Keller Drive -Robinson Drive to Jamboree Road
This segment is currently posted at 30 mph and has 1 through lane in each direction with
an ADT of 2,000 vehicles per day. The adjacent land use is residential. The critical speed
is 33 mph, which would normallyjustify a 35 mph posted speed limit. However, due to the
high number of pedestrians, elementary school drop-offs, heavy on-street parking and
sports activities in the adjacent sports park, a lower speed limit would be prudent. It is
recommended that the speed limit remain at 30 mph for the reasons given above.
Willdan Engineering 2010 Engineering and Traffic Survey
17398/3001/01-460 13 City of Tustin
Segment #55: Main Street -Williams Street to Myrtle Avenue
This segment is currently posted at 30 mph and has 1 through lane in each direction with
an ADT of 9,222 vehicles per day. The adjacent land use is residential (none fronting),
private school and church. The critical speed is 35 mph, which would normally justify a 35
mph posted speed limit. However, due to heavy on-street parking and reduced sight
distance related to the Main Street undercrossing/overcrossing of the I-5 and SR-55
Freeways, a lower speed limit would be prudent. It is recommended that the speed limit
remain at 30 mph for the reasons given above.
Segment #56: Main Street -Myrtle Avenue to Prospect Avenue
This segment is currently posted at 30 mph and has 1 through lane in each direction with
an ADT of 9,222 vehicles per day. The adjacent land use is residential area. The critical
speed is 34 mph, which would normallyjustify a 35 mph posted speed limit. However, due
to a high number of pedestrians, heavy on-street parking, its location in the downtown
Central Business District, and a high concentration of driveways, a lower speed limit would
be prudent. It is recommended that the speed limit remain at 30 mph for the reasons given
above.
Segment #64: Mitchell Avenue -Red Hill Avenue to Browning Avenue
This segment is currently posted at 30 mph and has 1 through lane in each direction with
an ADT of 5,983 vehicles per day. The adjacent land use is residential area. The critical
speed is 33 mph, which would normally justify a 35 mph posted speed limit. However, due
to the high number of pedestrians and heavy density of on-street parking and driveways, a
lower speed limit would be prudent. It is recommended that the speed limit remain at 30
mph for the reasons given above.
Segment #70: Newport Avenue -Bryan Avenue to EI Camino Real
This segment is currently posted at 35 mph and has 2 through lanes in each direction with
a raised median and left turn pockets, and an ADT of 27,344 vehicles per day. The
adjacent land use is primarily retail commercial with multi-family residential. A high school,
an elementary school, and two pre-schools are also located one block to the east of
Newport Avenue. The critical speed is 38 mph, which would normally justify a 40 mph
posted speed limit. However, due to the moderate number of pedestrians (including school
children) and the heavy concentration of driveways, a lower speed limit would be prudent.
It is recommended that the speed limit remain at 35 mph for the reasons given above.
Segment #71: Newport Avenue - EI Camino Real to Sycamore Avenue
This segment is currently posted at 35 mph and has 2 through lanes in each direction with
a two-way left turn lane, and an ADT of 26,990 vehicles per day. The adjacent land use is
retail commercial and multi-family residential, with a hospital medical center and a pre-
school. The critical speed is 38 mph, which would normallyjustify a 40 mph posted speed
limit. However, due to the medical center, moderate number of pedestrians (including
school children) and the heavy concentration of driveways, a lower speed limit would be
prudent. It is recommended that the speed limit remain at 35 mph for the reasons given
above.
willdan Engineering 2010 Engineering and Traffic Survey
17398/3001101-460 14 City of Tustin
Segment #75: Nisson Road -Pasadena Avenue to B Street
This segment is currently posted at 35 mph and has 1 through lane in each direction, with
no left turn pockets, and an estimated ADT of 4,000 vehicles per day. The adjacent land
use ismulti-family residential (none fronting) on one side and Interstate 5 on the other side.
The critical speed is 38 mph, which would normally justify a 40 mph posted speed limit.
However, due to the high density of driveways and heavy on-street parking that results in
very limited sight distance for those entering from driveways, a lower speed limit would be
prudent. It is recommended that the speed limit remain at 35 mph for the reasons given
above.
Segment #76: Nisson Road -Newport Avenue to Red Hill Avenue
This segment is currently posted at 35 mph and has 1 through lane in each direction, with
no left turn pockets, and an ADT of 8,912 vehicles per day. The adjacent land use ismulti-
familyresidential (none fronting) on one side and Interstate 5 on the other side. The critical
speed is 41 mph, which would normallyjustify a 40 mph posted speed limit. However, due
to the high density of driveways and heavy on-street parking that results in very limited
sight distance for those entering from side streets and driveways, a lower speed limit would
be prudent. It is recommended that the speed limit remain at 35 mph for the reasons given
above.
Segment #77: Nisson Road -Red Hill Avenue to Browning Avenue
This segment is currently posted at 35 mph and has 1 through lane in each direction with
no left turn pockets, and an ADT of 3,582 vehicles per day. The adjacent land use ismulti-
familyresidential (none fronting) on one side and Interstate 5 on the other side. The critical
speed is 40 mph, which would normallyjustify a 40 mph posted speed limit. However, due
to the high density of driveways and heavy on-street parking that results in very limited
sight distance for those entering from driveways, a lower speed limit would be prudent. It is
recommended that the speed limit remain at 35 mph for the reasons given above.
Segment #83: Pasadena Avenue -McFadden Avenue to Sycamore Avenue
This segment is currently posted at 30 mph and has 2 through lanes in each direction with
an ADT of 13,456 vehicles per day. The adjacent land uses consist of a mixture of multi-
family residential, school, and commercial. The critical speed is 35 mph and would
normally justify a 35 mph posted speed limit. However, due to a high number of
pedestrians, heavy parking demand, and an uncontrolled school crosswalk, a lower speed
limit would be prudent. It is recommended that the speed limit remain at 30 mph for the
above reasons.
Segment #85: Pioneer Road -Jamboree Road to Patriot Way
This segment is currently posted at 40 mph and has 1 through lane in each direction with
an ADT of 2,759 vehicles per day. The adjacent land use is residential. The critical speed
is 43 mph, which would normallyjustify a 45 mph posted speed limit. However, due to the
adjacent elementary school and public park, and the designated bike lanes, a lower speed
Willdan Engineering 2010 Engineering and Traffic Survey
17398/3001/01-460 15 City of Tustin
limit would be prudent. It is recommended that the speed limit remain at 40 mph for the
reasons given above.
Segment #91: Prospect Avenue -17th Street to Amaganset Way
This segment is currently posted at 40 mph and has 2 through lanes in each direction, no
median ortwo-way-left-turn lane, with an ADT of 9,442 vehicles per day. The adjacent land
use is residential (none fronting). The critical speed is 44 mph, which would normallyjustify
a 45 mph posted speed limit. However, due to the moderate number of pedestrians, no left
turn pockets, large number of intersections, and to maintain continuity with the adjacent
street segments, a lower speed limit would be prudent. It is recommended that the speed
limit remain at 40 mph for the reasons given above.
Segment #99: Red Hill Avenue -Walnut Avenue to Sycamore Avenue
This segment is currently posted at 40 mph and has 3 through lanes in each direction with
an ADT of 29,751 vehicles per day. The adjacent land use is commercial and multi-family
residential. The critical speed is 43 mph, which would normally justify a 45 mph posted
speed limit. However, due to the high number of pedestrians (including school children),
the moderate driveway density and bus stops, and to maintain continuity with the adjacent
street segments, a lower speed limit would be prudent. It is recommended that the speed
limit remain at 40 mph for the reasons given above.
Segment #100: Red Hill Avenue -Sycamore Avenue to Edinger Avenue
This segment is currently posted at 40 mph and has 3 through lanes in each direction with
an ADT of 29,751 vehicles per day. The adjacent land use is residential and commercial
with an elementary school and a middle school. The critical speed is 44 mph, which would
normally justify a 45 mph posted speed limit. However, due to the high number of
pedestrians (including school children), the adjacent schools, and adjacent railroad
crossing that will have a substantial increase in the number of trains in the very near future,
a lower speed limit would be prudent. It is recommended that the speed limit remain at 40
mph for the reasons given above.
Segment #104: Robinson Drive -Irvine Boulevard to Jamboree Road
This segment is currently posted at 35 mph and has 1 through lane in each direction with
an ADT of 4,237 vehicles per day. The adjacent land use is a residential area (none
fronting) with an elementary school and public sports park. The critical speed is 39 mph,
which would normally justify a 40 mph posted speed limit. However, due to the high
number of pedestrians, the designated bike lanes, the school and the park, a lower speed
limit would be prudent. It is recommended that the speed limit remain at 35 mph for the
reasons given above.
Segment #105: San Juan Street -Newport Avenue to Red Hill Avenue
This segment is currently posted at 30 mph and has 1 through lane in each direction with
an ADT of 3,075 vehicles per day. The adjacent land use is residential with an elementary
school and a high school. The critical speed is 33 mph, which would normally justify a 35
mph posted speed limit. However, due to the high number of pedestrians, on-street
Willdan Engineering 2010 Engineering and Traffic Survey
17398/3001/01-460 16 City of Tustin
parking, heavy concentration of driveways and the two schools, a lower speed limit would
prudent. It is recommended that the speed limit remain at 30 mph for the reasons given
above.
Segment #106: San Juan Street -Red Hill Avenue to Browning Avenue
This segment is currently posted at 30 mph and has 1 through lane in each direction with
an ADT of 4,385 vehicles per day. The adjacent land use is residential, with an elementary
school and a middle school present. The critical speed is 36 mph, which would normally
justify a 35 mph posted speed limit. However, due to the high number of pedestrians, the
schools, heavy on-street parking and high concentration of driveways, a lower speed limit
would be prudent. It is recommended that the speed limit remain at 30 mph for the reasons
given above.
Segment #119: Valencia Avenue -Red Hill Ave. to Armstrong Avenue/Severyns Rd.
This segment is currently posted at 40 mph and has 2 through lanes in each direction with
an ADT of 3,300 vehicles per day. The adjacent land use is educational and park. The
critical speed is 48 mph, which would normally justify a 50 mph posted speed limit.
However, due to the moderate density of driveways and the presence of sidewalks and
bicycle lanes, a lower speed limit would be prudent. It is recommended that the speed limit
be posted at 45 mph for the reasons given above.
Segment #120: Valencia Avenue -Armstrong Ave./Severyns Road to Kensington
Park Dr.
This segment is currently posted at 40 mph and has 2 through lanes in each direction with
an ADT of 3,400 vehicles per day. The adjacent land use is a residential area (none
fronting on north side), and the abandoned Marine Corps Air Station on the south side.
The critical speed is 49 mph, which would normally justify a 50 mph posted speed limit.
However, in order to maintain continuity with the adjacent roadway segments, a lower
speed limit would be prudent. It is recommended that the speed limit be posted at 45 mph
for the reasons given above.
Segment #127: Williams Street -Main Street to McFadden Avenue
This segment is currently posted at 30 mph and has 1 through lane in each direction with
an ADT of 6,289 vehicles per day. The adjacent land use is a residential area (none
fronting) with an elementary school. The critical speed is 33 mph, which would normally
justify a 35 mph posted speed limit. However, due to the high number of pedestrians, on-
streetparking with a moderate driveway density, a lower speed limit would be prudent. It is
recommended that the speed limit remain at 30 mph for the reasons given above.
Willdan Engineering 2010 Engineering and Traffic Survey
17398/3001/01-460 17 City of Tustin
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Table 2
Segments with Recommended Speed Limit Increases
#
Street Name
Segment Posted
Seed Limit Recommended
Speed Limit
8 Bryan Avenue Red Hill Avenue To Farmington Road 40 45*
9 Bryan Avenue Farmington Road To Browning Avenue 40 45*
16 Edinger Avenue W/O Newport Ave.-WCL To Red Hill Avenue 45 50"
22 EI Camino Real Main Street To Newport Avenue 25 30*
23 EI Camino Real Newport Avenue To Red Hill Avenue 35 40*
24 EI Camino Real Red Hill Avenue To Browning Avenue 35 40*
25 EI Camino Real Browning Avenue To Tustin Ranch Road 35 40"
26 EI Camino Real Tustin Ranch Road To Myford Road 35 40*
35 Heritage Way Myford Road To Bryan Avenue 30 35
37 Holt Avenue Irvine Boulevard To Newport Avenue 25 30
43 Irvine Boulevard Tustin Ranch Road To Jamboree Road 45 50*
49 Jamboree Road Irvine Boulevard To Bryan Avenue 45 50
50 Jamboree Road Bryan Avenue To I-5 (City Limit) 40 45*
53 Kensington Park Dr. Valencia Avenue To Edinger Avenue (40) 45*
54 Main Street West City Limit To Williams Street 30 35*
72 Newport Avenue Sycamore Avenue To 1100 ftS10 Sycamore 30 35*
73 Newport Avenue Edinger Avenue To Del Amo Ave./
SR-55 Ramps (40) 45*
74 Newport Avenue Del Amo Ave./ To Valencia Avenue
SR-55 Ramps (40) 45*
78 Old Irvine Boulevard Newport Avenue To Irvine Boulevard 30 35
84 Patriot Way Pioneer Road To Jamboree Road 30 35"
93 Prospect Avenue Irvine Boulevard To First Street 30 35*
94 Prospect Avenue First Street To Main Street 25 30"
97 Red Hill Avenue EI Camino Real To Mitchell Avenue 35 40*
98 Red Hill Avenue Mitchell Avenue To Walnut Avenue 35 40*
101 Red Hill Avenue Edinger Avenue To Valencia Avenue 45 50"
119 Valencia Avenue Red Hill Avenue To Armstrong Ave./
Severyns Rd. (40) 45
120 Valencia Avenue Armstrong Ave./ To Kensington Park Dr.
Severyns Rd. (40) 45
121 Vandenberg Lane Yorba Street To Prospect Avenue 30 35*
122 Walnut Avenue Newport Avenue To Red Hill Avenue 35 40"
123 Walnut Avenue Red Hill Avenue To Browning Avenue 35 40*
129 Yorba Street 17th Street To Jacaranda Avenue 35 40
130 Yorba Street Jacaranda Avenue To Amaganset Way 35 40*
131 Yorba Street Amaganset Way To Irvine Boulevard 35 40*
132 Yorba Street Irvine Boulevard To First Street 30 35*
(40) =Speed limit currently posted on new segment, based on engineering judgement without confirmation of
Engineering and Traffic Survey
45" =Speed limit increased due to new Caltrans Policy Directive No. 09-04.
Willdan Engineering 25 2010 Citywide Engineering and Traffic Survey
17398/3007/01-460 City of Tustin
STATE OF CALiFORNiA• DEPARTMENT OF TRANSPORTATION
POLICY DIRECTIVE
TR-001l (REV 912006)
NUMBF,R: PAGE:
TRAFFIC OPERATIONS POLICY DIRECTIVE f 7
1
09-04 o
ROBERT COPP, Dy~IBT(~i I CIIIEF (Signatttre) -
~ DATE ISSUED: I;PPECTIVF, DATE:
f ~
~~ // June 29, 2009 July 1, 2009
SIfifIJL'C'f: DISTRIBUTION
Change in current California Manual on Uniform
®AIl District Directors
'T'raffic Control Devices (California MUTCD) policy and
procedure for setting speed limits in California. ®All Deputy District Directors - Traffic Operations
® All Deputy District Directors - Maintenance
® All Deputy District Directors - Construction
® All Deputy District Directors - Design
All Deputy, District Directors - Transportation Planning
Chief, Division of Engineering Services
® Chief Counsel, Legal Division
® Publications (California MUTCD Website)
~xnvw.dot.ca.goWhq/traffops/signtcch/mutcdsupp/ca mutcd.htm
Headquarters Division Chiefs for.
DOES THIS DIRECTIVE AFFECf OR S(JPERSEDF, ll' YES, DESCRIBE
ANOTHER DOCUMENT? ®YES ^NO
Amends Chapter 2B of the California MU"fCD.
WILL T[IIS DIRECTIVE IIE INCORPORA'CED [N IF YES, DESCRIBE
THE CALIFORNIA MANUAI, ON UNIFORM
'TRAFFIC CONTROL DEVICES ®YES ^NO Chapter 2B, Sections 28.13.
DIRECTIVE
Pursuant to the authority granted to the California Department of Transportation (Department) in
Section 21400 and 21401 of the California Vehicle Code (CVC), the changes included in this directive for
setting speed limits in California shall be included in Part 2 of the California MUTCD, dated September 26,
2006.
Willdan Engineering 42 Engineering & Traffic Survey
17398/3001/01-460 City of Tustin
STATE OF CALIFOR,NIA• DEPARTMENT OF TRANSPORTATION
POLICY DIRECTIVE
rR-W l 1 (REV 9/2006) Page 2 of 7
IMPI,F.MF.NTATION
In this section, for purposes of clarity, strikethrough text is used to denote text in the California MiJTCD that is
being deleted and italic text is used to denote text that is being added to the California MUTCD. All other
formatting as defined under the Definitions section of this Policy Directive is still applicable.
'The following policies shall be included in the California MUTCD:
Section 2B.13 Speed Limit Sign (1t2-1)
Support.•
The setting of speed limits can be controversial and requires a rational and defensible determination to maintain
public confidence. Speed limits are normally set near the 85th percentile speed that statistically represents one
.standard deviation above the average speed and establishes the tipper limit of what is considered reasonable and
prudent. As with most laws, speed limits need to depend on the voluntary compliance of'the greater majority of
motorists. Speed limits cannot be set arbitrarily low, as this would create violators of the majority of drivers and
would not command the respect ojthe public.
Standard:
After an engineering and traffic survey (E&TS) stab has been made in accordance with established traffic
engineering practices, the Speed Limit (R2-1) sign (see Figure 2B-1) shall display the limit established by law,
ordinance, regulation, or as adopted by the authorized agency. The speed limits shown shall he in multiples of
10 km/h err (5 mph).
Guidance:
At least once every 5 7 or 10 years in compliance with Cl~C Section 40802. States and local agencies should
reevaluate non-statutory speed limits on segments of their roadways that have undergone a significant change in
roadway characteristics or surrounding land use since the last review.
No more than three speed limits should be displayed on any one Sneed Limit sign or assembly.
Q Gfl. « e«*:ls .. .~.,.7 ,.F {~...o ~1.....:«.. f..n 1't :..
Standard:
When a speed limit is to be posted, it shall be established at the nearest !0 km/h (5 mph) increment of the
85th percentile speed offree-flowing traffic, except as shown in the Option below
Option:
The posted speed may be reduced by ] 0 km/h (5 mph) from the nearest 10 kmlh eF (5 mph) increment of the
85th-percentile speed, in compliance with CUC Sections 627 and 22358.5.
Standard:
!f the speed limit to be posted has had the 70 km/h (S mph) reduction applied, then an E&TS shall document
in writing the conditions and justifrcation for the lower speed limit and be approved by a registered Civil or
Traffac Engineer. The reasons for the lower speed limit shall be in compliance with CVC Sections 627 and
22358. S.
ADA Notice For individuals with sensory disabiltties, This document is available in alternate formats. For information call (916) 653-3657 or TDD (916) 654-3880
or write Records and Fortes Management, 1120 N Street, MS89, Saeramento, CA 95814.
Willdan Engineering 43 Engineering & Traffic Survey
17398/3001/01-460 City of Tustin
STATE OF CAL[FOR\l]A• DEPARTMENT OF TRANSPORTATION
POLICY DIRECTIVE
'TR-0011 (REV 9!2006) Page 3 of 7
L1~IPLEMENTATION (Cont'd)
Support:
An example of the application of this speed limit criteria is as follows:
• If the 85~` percentile speed in a speed survey was 60 km/h (37 mph), then the speed limit would be posted at
35 mph or optionally reduced to 30 mph. However,
• If the 85th percentile speed in a speed survey was 61 km/h (38 mph), then the speed limit would be posted at
40 mph or optionally reduced to 35 mph.
• ,
n ^ a T_.,rc:,, c„«,e„ r>~ p.TCi «~.a•,..-..,oa ,.« n«..:t ~ tann a,.o r ....e...,..,,.t ~« A«,.:1 ~ ~nn~ is
~
b b J \ I C r ~ r
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. ,
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t
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"this directive does not recommend any other changes for the remainder of this section at this time.
In all applications of this policy, engineering judgment must be exercised. The objective is to provide uniform
applications of signs statewide. If there are any questions regarding implementation, districts should consult with
the Headquarters Traffic Operations Liaison.
DELEGATION
No new delegations of authority are created under this policy.
ADA Notice For individuals with sensory disabilitles, Ihis document is available in alternate formats. For infortnadon call (916) 653-3657 or TOD (916) 654-3880
or write Records artd Forrns Management, 1120 N Street, MS89, Sacramento, CA 95814.
Willdan Engineering 44 Engineering & Traffic Survey
17398/3001/01-460 City of Tustin
STATE OF CALIFORNIA• llEPARTMENT OF TRANSPORTATION
POLICY DIRECTIVE
TR-001 I (REV 9/2006) Page 4 of 7
BACKGROUND
'I'tIe purpose of this directive is to implement the changes proposed in the Decision Document entitled "Guidelines
for Setting Speed Limits" signed on May 15, 2009 by Director Will Kempton.
This Decision Document was the result of many discussions about speed limit concerns held before the California
Traffic Control Devices Committee (CTCDC) since June of 2007. During these discussions, many comments were
received from local agencies and their officials representing law enforcement, public works, and the court system.
A special hearing was held on March l9, 2009 and was attended by the Director and the Califomia Highway Patrol
Commissioner. The purpose of this hearing was to bring closure to this discussion before the Director issued his
Decision Document.
After reviewing the concerns expressed by various participants involved with setting and enforcing speed limits,
Caltrans determined there was a lack of consistency in the analysis and process that documents Engineering and
Traffic Surveys to establish rational and enforceable speed limits.
In 2004, the California Supplement to the 2003 Federal MUTCD changed the procedure setting speed limits used
previously in the 1996 Caltrans Traftc Manual. These changes were made to bring California into compliance with
the Federal MUTCD at that time, but the California Supplement included the option to allow a mph reduction from
the nearest increment of the 85`h percentile speed. The changes are summarized below:
1996 Traffic Manual:
The speed limit normally should be established at the first five mile per hour (mph) increment below the 85`b
percentile speed. However, in matching existing conditions with the traffic safety needs of the community,
engineering judgment may indicate the need for a further reduction of five mph.
MUTCD 2003 (Federal Guidance, does not allow Smph reduction):
Guidance:
When a speed limit is to be posted, it should be within 10 km/h or 5 mph of the 85`h percentile speed of free-
flowing traffic.
Mav 2004 CA Supplement:
Guidance:
When a speed limit is to be posted, it should be established at the nearest 10 km/h or 5 mph increment of the
85~' percentile speed offree-flowing traffic.
()ptian:
The posted speed may be reduced by 10 km/h (5 mph) from the nearest 10 km/h or 5 mph increment of the
85°i percentile speed, where engineering study indicates the need for a reduction in speed to match existing
conditions with the traffic safety needs of the community.
ADA Notice For individuals with sensory dlsabiliGes, this document Is available in alternate formats. Far information call (916) 653-3657 or TOD (916) 654-3880
or write Records and Forms Management, 1120 N Street, MS89, Sacramento, CA 95814.
Willdan Engineering 45 Engineering & Traffic Survey
17398/3001/01-460 City of Tustin
STATE OF CALIFORNIA. DEPARTMENT OF TRANSPORTATION
POLICY DIRECTIVE
TR-0OI 1 (REV 912006) Pagc 5 of ~
SPEED LIMITS SET WITH 2004 CHANGES
After applying the "nearest Smph increment of the 85`h percentile speed" criteria, many speed limits were being
raised after the 2004 change in the California MUTCD speed limit procedures. Some agencies would then simply
apply the 5 mph reduction to keep the speed limit at the same level or lower. Also, appropriate justification was not
written up in the E&'fS for many of these speed zones and speeding tickets were not upheld in court ifthe presiding
ot~cial saw a speed limit set below the 85'b percentile speed.
PROCEDURE AF`fER JULY 1, 2009
This directive clarifies the procedure for setting speed limits to address the issues discussed above. The two new
standazds for Section 2B.13 of the Califomia MUTCD will be implemented to clarify the process and to help set
speed limits that are uniform, rational and enforceable with full support of the judicial system. Requirements of the
new standards are shown below:
• The speed limit shall be established at the nearest Smph increment of the 85~' percentile.
• If the 5 mph reduction is applied, the E&TS shall document in writing the conditions and justification for the
reduced speed limit and be approved by a registered Civil or Traffic Engineer.
ONE YEAR TRIAL and DATA COLLECTION
In order to evaluate any impacts of the new standards, the following data needs to be collected and evaluated over
the next twelve months (from E&TS's completed between July 1, 2009 and July 1, 2010):
• Jurisdiction and Location identification
• Existing posted speed limit
• 85`h percentile speed limit
• 50`~ percentile speed limit
• 10-mph pace (the speed range that includes the most vehicles surveyed)
• List of reasons for applying a 5 mph reduction (if used)
• New posted speed limit
This information should be sent to Caltrans at the following a-mail address:
roberta.mclauahlin(c%,dot.ca.~,ov
The data will be reviewed for trends in the posting of new speed limits. After July 1, 2010 this information will be
presented to the Caltrans Director, CHP Commissioner and the CTCDC for consideration to make additional
changes to the policy for setting speed limits in Califomia.
ADA Notice For individuals vnth sensory disabilmes, this document is available in alternate formats. For information call (916) 653-?657 or TDD (916) 6543880
or write Records and Farms Management, 1120 N Street, MS89, Sacramento, CA 95814.
Willdan Engineering 46 Engineering & Traffic Survey
17398/3001/01-460 City of Tustin
STATE OF CALIFORNIA. DEPARTMh-NT OF T[L'\NSPORTATION
POLICY DIRECTIVE
TR-001 I (REV 9/2006) Page 6 of'7
ENGINEERING AMID TRAFFIC SURVEY WORKSHOPS
The Director's Decision Document also states that Caltrans will develop an E&TS training program for engineers,
enforcement personnel, and judiciary ol~icials. Specific workshop topics will include:
• Conducting an Engineering and Traffic Survey
• Selecting locations for speed data collection
• Items to be included in the E&TS written report
• Documenting reasons for applying the 5 mph reduction
• Presenting findings to local government officials
• [Jsing the E&TS to review speeding citations challenged in court
Workshops will beheld in each of the l2 Caltrans District Offices and will be scheduled over the next 6 months.
Workshop location, contact information and dates will be posted on the Office of Signs, Markings and External
Support web site:
http:/iwww.dot. ca.);ov~hg/traffopsisigrrtech/
SPEED LIMIT IMPACTS ON YELLOW SIGNAL TIMING
[n the California MUTCD, Section 4D.10 -Yellow Change and Red Clearance Intervals, the Standard states that the
yellow light change interval shall be set using the posted speed limit. When the posted speed limit is set below the
85`h percentile speed as a result of a new E&TS, there may be a need to re-evaluate the length of time given to the
yellow signal phase. Consideration should be given to use the 85`b percentile speed to increase the yellow light
change interval, as allowed by the option in the California MUTCD. An increase change of 5 mph or greater in the
posted speed limit should result in the relocation of traffic signal vehicle detectors.
"I'lre revision of the California MUTCD is a common practice based upon need. The Department, pursuant to
CVC Section 21400; must conduct public hearings before it can revise existing traffic control device policies and
approve new signs for use on public roadways. The California Traffic Control Devices Committee (CTCDC) is the
forum used to satisfy this requirement.
The Federal highway Administration has reviewed the proposed modifications to the California MUTCD and
has determined that they are in substantial compliance with the National MUTCD.
This policy will be retired when it is incorporated in the next revision of the California MUTCD.
ADA Notice For individuals with sensory disabilities, this document is available in alternate formats. For information call (916) 653-3657 or TDD (916) 6543880
or write Records and Fonns Management, 1120 N SUeet. MS89, Sacramento, CA 95814.
Willdan Engineering 47 Engineering & Traffic Survey
17398/3001/01-460 City of Tustin
STATE OF CALIFORNTA• DEPARTMENT OF TRANSPORTATION
POLICY DIRECTIVE
TR-0011 (REV 9/2006) Page 7 of 7
When used in this Traffic Operations Policy Directive, the text shall be defined as follows:
1) Standard - a statement of required, mandatory or specifically prohibited practice. All standards text
appears in bold type. 'The verb shall is typically used. Standards are sometimes modified by Options.
2) Guidance - a statement of recommended, but not mandatory, practice in typical situations, with
deviations allowed if engineering judgment or engineering study indicates the deviation to be
appropriate. All Guidance statements text appears in underline type. The verb should is typically used.
Guidance statements are sometime modified by Options.
3} Option - a statement of practice that is a permissive condition and carries no requirement or
recommendation. Options may contain allowable modifications to a Standard or Guidance. All Option
statements text appears in normal type. The verb may is typically used.
4) Support - an informational statement that does not convey any degree pf mandate, recommendation,
authorization, prohibition, or enforceable condition. Support statements text appears in normal type.
The verbs shall, should and may are not used in Support statements.
ATTACHiVIENTS
None
ADA Notice For individuals with sensory disabilities, this document is available in al[emate formals. For information wll (916) 653-3657 or TDD (916) 6543880
or write Records and Forms Management, 1120 N Street, MS89, Sacramento, CA 95814.
Willdan Engineering 48 Engineering & Traffic Survey
17398/3001/01-460 City of Tustin