82-002 Traffic Study CH2M Hill; Resolution No. 5787RESOLUTION NO. 5787
A RESOLUTION OF THE CITY COUNCIL OF THE CITY OF CUPERTINO
AUTHORIZING EXECUTION OF AGREEMENT BETWEEN THE CITY AND
CH2M HILL, CONSULTANT FOR A TRAFFIC STUDY
WHEREAS, the City is desirous of engaging the services of a consultant
to conduct a traffic study; and
WHEREAS, the firm of CH2M Hill is qualified and willing to conduct
said study; and
WHEREAS, the scope of work and the proposal submitted by CH2M Hill
outlines the terms and conditions of the required study;
NOW, THEREFORE, BE IT RESOLVED that the Mayor and the City Clerk are
hereby authorized to execute an agreement between the City of Cupertino
and CH2M Hill providing for a traffic study to be conducted by CH2M Hill.
PASSED AND ADOPTED at a regular meeting of the City Council of the
City of Cupertino this 21st day of December , 1981 by the following
vote:
Vote Members of the City Council
AYES: Johnson, Plungy, Rogers, Gatto
NOES: t\one
ABSENT: Sparks
ABSTAIN: None
APPROVED:
Isl .John Gatto
Mayor, City of Cupertino
ATTEST:
Isl Dorothy Cornelius
City Clerk
City of Cupertino
AGREEMENT
(ATTACHMENT)
NO. ______ _
BY THIS AGREEMENT made and entered into on the day of 19 ------by and between the CITY OF CUPERTINO (Hereinafter referred to as CITY) and
Name (1) CH M Hill (2)
Address 2200 Powell Street, 8th Floor City Emeryv..,..i-=-1-=-1-e-,-c=Ac-----Z-ip--,9"""""4'"""'6,....,0""'8~p-ho_n_e_,4~1~5~/~6~5~2-2626
(Hereinafter referred as CONTRACTOR), in consideration of their mutual covenants, the parties hereto agree as follows:
CONTRACTOR Shall provide or furnish the following specified services and/or materials:
Provide a traffic study as per scope of work outlined in Exhibits A and B
DELIVERY:
EXHIBITS: The following attached exhibits hereby are made part of this Agreement:
Exhibit A and Exhibit B
TERMS The services and/or materials furnished under this Agreement shall commence on December 22' 1981
and shall be completed before February 1, 1981. .
COMPENSATION For the full performance of this Agreement, CITY shall pay CONTRACTOR:
An amount not to exceed fourteen thousand seven hundred dollars ($14,700.00)
GENERAL TERMS AND CONDITIONS
Hold Harmless. Contractor agrees to save and hold harmless the City, its officers, agents and employees from any and
all damage and liability of every nature, including all costs of defending any claim, caused by or arising out of the per-
formance of this agreement. City shall not be liable for acts of Contractor in performing services described herein_.
This indemnification shall not apply to claim, losses, or liabilities that arise
out of circumstances involving professional services unless Contractor has been
found negligent in the performance of said services.
Insurance. Should the City require evidence of insurability Contractor shall file with City a Certificate of Insurance
before commencing any services under this agreement. Said Certificate shall be subject to the approval of City's
Director of Administrative Services.
Non-Discrimination. No discrimination shall be made in the employment of persons under this agreement because of
the race, color, national origin, ancestry, religion or sex of such person.
Interest of Contractor. It is understood and agreed that this agreement is not a contract of employment in the sense
that the relation of master and servant exists between City and undersigned. At all times Contractor shall be deemed to
be an independent contractor and Contractor is not authorized to bind the City to any contracts or other obligations in
executing th is agreement. Contractor certifies that no one who has or will have any financial interest under th is
agreement is an officer or employee of City.
Changes. This agreement '>hall not be assigned or transferred without the written consent of the City. No changes or
variations of any kind are authorized without the written consent of the City.
This Agreement shall become effective upon its execution by CITY, in witness
whereof, the parties have executed this Agreement the day and year first written
above.
CITY OF
City Attorney
9/30/81
11/2/81
BACKGROUND
C I T Y 0 F C U P E R T I N 0
SCOPE OF WORK
TRAFFIC STUDY
tXf-UBIT A
The City staff has completed a traffic study as part of the City's
transportation element of the General Plan. Appropriate segments of a com-
puterized traffic model developed by the County of Santa Clara, based on data
generated by the Metropolitan Transportation Commission (MTC) and the Associa-
tion of Bay Area Governments (ABAG) study, were utilized to generate the 1990
traffic projection and trip assignments. The original Caltrans model as
developed in 1968 and as used in 1973 for the general plan studies did not
consider subsequent changed conditions since the models were developed: e.g.
flexible work hours, rising fuel costs, car or van pooling, stop-offs on commute
trips, reductions in car sizes, etc., but has been modified to reflect some
effects of increased and increasing transit ridership.
CONSULTANT'S SCOPE OF WORK
The consultant will be requested to provide a two phase study:
Phase 1 will be to review, analyze, validate and/or define his significant
differences, if any, with the first half of the staff's report. This part of the
work is to be a quick overview and general perspective document to assure the
recipients that there are no major errors in interpretations, analyses, or pro-
j ections.
Phase 2 will utilize the validated or annotated data base established in
Phase l, and continue the review, analysis, and validation of the staff's second
half report, proceeding as in Phase 1. This report will .include alternate anal-
ysis of the two different land use alternatives which will be incorporated in the
data for the General Plan environmental review process.
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PHASE 1 STUDY: The Consultant shall:
1. Familiarize himself/herself with the County's traffic model which was
the basis of the traffic projection and trip assignment for Cupertino at
present, and in 1990 (future).
2. Review the MTC/ABAG corridor evaluation study and be familiar with future
trends, growth patterns, and major capital improvements to be undertaken
by 1990, and which will significantly affect Cupertino.
3. Review the City's method of utilizing appropriate segments of the County
model trip assignments and volume projections during the a.m. peak hour.
Three areas are to be reviewed:
a. Outbound trips which are housing trips leaving the Cupertino
zone and destined to other traffic zones.
b. Inbound trips, which are the job trips entering the Cupertino
zone from other traffic zones.
c. Internal trips, which are home to job trips within the Cupertino zone.
4. Review the traffic volumes taken around the perimeter of the City's
traffic zone to compare with the nearest comparable volume projected
by the traffic mode.
5. Review the projection of traffic from 1980 to 1990, utilizing the
traffic model projections.
6. Review the method of converting from a.m. peak calculations to p.m.
companions.
7. Review the license plate survey taken to further verify the different
components of the total traffic during the p.m. peak hour.
8. Review and comment on findings arrived at (by the City staff) from
the base line data developed for the larger county areas.
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9. Advise the client on the potential merits to this study,and likely
cost, of a proposed one-time (a.m. peak period for one selected work
day) post card survey, with distribution at selected major control points.
(Survey itself is not a part of this contract.)
10. Provide the client with a rough order of accuracy of the City's
techniques used to account for changing conditions such as fuel cost,
flex time working hours, car or van pooling, rates of growth, etc.
(The above review by the consultant will entail reviewing all three phases
of the staff report on the traffic element as outlined above .. )
PHASE 2: The consultant's work shall require:
A review, the same in scope, format, and evaluation as for Phase 1.
Since the staff's second half report has not as yet been released, its
contents are not as yet public information. It is anticipated that this
staff report will include an alternative analysis of two land use intensity
scenarios:
a. Base line intensity of land use (the present level per the
present General Plan).
b. High intensity end (reflecting developer proposals known to the
staff).
NECESSARY ASSUMPTIONS AND "GIVENS" AS THEY MAY AFFECT CUPERTINO GOALS
AND OBJECTIVES:
l'. Latest ABAG/MTC corridor evaluation recommendations which may be
implemented.
2. Future trends and assumptions would be those of the Santa Clara
County traffic model.
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3. A level of service "D" be established as a minimum for intersections
within the City.
4. Through traffic would be discouraged from using residential neighbor-
hood streets.
5. Make City streets more conveniently usable to the residents.
TRAFFIC IMPACTS:
Traffic impacts shall then be specifically reviewed for the following major
traffic areas:
1. Route 85 corridor within Cupertino; three possible scenarios:
a. Roadway to De Anza Boulevard/Prospect only.
b. Expressway to 101.
c. Freeway to 101.
2. Intersection of Stevens Creek Boulevard and De Anza Boulevard; two
possible scenarios:
a. Grade separation.
b. At-grade signal and channelization.
3. West Cupertino neighborhood areas, including Stelling Road, Bubb Road,
and the extension of Bollinger Road as impacted for better or worse by
the scenarios developed for items 1 and 2.
4. Vallco Park and streets within same.
5. OthE;r major intersections throughout the City now "E" level or worse.
MITIGATING MEASURES: CONCEPTURAL IMPROVEMENTS: LIKELY IMPROVEMENT COSTS:
The consultant shall review the improvement program for both the land use
alternatives mentioned.
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FEE:
The fee for the study should be broken down for each of the phases. In
each case an hourly breakdown should be provided for each task of each phase.
Br! EID PROJECT APPROACH EXH!BlT B
The City of Cupertino is preparing a traffic study as part of the trans-
portation element of the City's General Plan. The study is being per-
formed in two phases. The first half report dealt with the validation of
the County's computerized traffic model as it relates to Cupertino,
determination of future ( 1990) traffic conditions, and identification of
required roadway system improvements. The projections in the first
half report were based on the City's current land use plan. The
second half report will determine and compare the differences between
traffic projections associated with two land use scenarios.
At this time, the Transportation Subcommittee of the Cupertino Citizen's
Goals Committee desires an independent review of the traffic study.
prior to adopting it as part of the General Plan. The section below
describes CH2M Hill's proposed approach to the review effort. It is
organized according to the scope of work in the Request for Proposal (RFP).
SCOPE OF WORK
Our proposed approach to the review of Cupertino's traffic study i5
directed towards the achievement of two main objectives: (1) to verify
the technical work that has been performed by City staff, and ( 2) to
clarify the procedures, conclusions, and recommendations contained in
the City's reports. The successfu I accomplishment of both objectives is
essential to the adoption and irr~pleme;itation of a transportation plan
that truly meets the needs of the City of Cupertino.
The review of the items outlined in the RFP will be performed from two
perspectives. The larger perspective will evaluate the overall method-
ology employed in the study. The methodology will be depicted in flow
chart form, breaking the total effort down into a series of individual
tasks. The methods employed will be reviewed for their conformance
with state-of-the-art transportation planning techniques, their ability to
achieve desired results, and their compatibility with existir.g Association
of Bay Area Governments IM etropol i tan Transportation Com miss ion
(ABAG/MTC) and Santa Clara County transportation planning efforts.
The relationship and importance of the individual tasks to the achievement
of overali study goals will be determined and described.
From a smaller perspective, we wi ii review the work performed in the
individual tasks. Items to be reviewed include: the source of data, its
appropriateness for the intended use, the assumptions utilized, the
method of handling or transforming the data, and the conclusions drawn
from the task. Through this process it will be possible to determine
the reliability of the output of each task before it is utilized i·n succeeding
tasks.
We wi II document, in both written and graphic terms, our analysis of
the process used by the City in preparing the traffic study. We will
clearly identify the items that we are able to verify, and provide sup-
porting evidence. For assumptions that were based on professional
judgment and loca I experience, we wi 11 discuss the range of assumptions
that were possible for the situation. Areas that we cannot verify or
that we disagree with will be identified, and the consequences of utilizing
the improper method will be discussed. Most importantly, the reasons
for our disagreement with an iterl will be clearly described. We will
identify alternative methods for achieving the same purpose.
Through 30-percent and. 70-percent progress reports we will submit our
preliminary findings. We will describe our analysis, state conclusions
that we have reached, comment on the reliability of the data, and
recommend modifications or additional a na/ ysi s where appropriate. If
desired by the Subcommittee, a working session will be held when the
progress reports are submitted,and at the end of the review process.
A final report will be prepared upon completion of the review. It will
attempt to clarify the methodology used in preparing the traffic study,
point out its strengths and weaknesses, and recommend additional steps
that may be necessary.
The following activities briefly describe our current understanding of
the work necessary to accomplish the scope outlined in the RFP.
PHASE I STUDY
This study will review and evaluate the work performed by the City in
the preparation of the three working papers that comprise the first half
Traffic Study Report.
Task 1
In this task we will meet with Santa Clara County staff to obtain specific
information on the current Countywide traffic model. We will devote
special attention to the factors dealing with the generation and distribu-
tion of trips related to Zone .10, which includes Cupertino. We wil I also
obtain first-hand information on the methods used to calibrate the
model, the capacity restraint mechanism used, the basis for projections,
·and the roadway improvements included in the future network. If any
alternative computer runs were made to test different links in the
roadway system in or near Cupertino, we will examine the results to
obtain an understanding of the sensitivity of the model and to observe
the relative magnitude of changes that occurred.
Task 2
The A 8 AG IM TC Corridor Eva! uation Study wi 11 be reviewed with emphasis
on factors that directly or indirectly affect Cupertino. A summary will
be prepared to outline the inputs and assumptions used in the regionally
oriented study. Future improvements to roadways in the Cupertino
area that were included in the study will be identified. The limitations
of the mode! will also be determined.
Task 3
The County's model calculates home-to-work trips, and therefore represents
morning (a.m.) peak traffic. Four types of trips comprise the total
traffic volumes that are experienced or projected for Cupertino streets.
They are:
o Outbound trips, which are home-based in Cupertino and
destined for jobs in other zones ( i nterna I-extern a I trips)
o Inbound trips, which are destined for jobs in Cupertino fror:i
residences in other zones ( external-i nterna I trips)
o Internal trips, which are home-to-job trips within Cupertino
(internal-internal trips)
o Through trips, which both start and end outside of Cupertino
but pass through the City (external-external trips)
The method of extracting trip information for Zone 10, which includes
Cupertino, from the County's model for use in the City's study will be
reviewed. The assumptions required to obtain useful i:1formation, the
practicality of isolating Zone 10 from the Countywide system, and the
reliability of the data will be deter~ined.
Task 4
The City recently obtained current traffic voru~es on arterial and
collector roadways in the Cupertino area through a series of field
counts. The information was used to validate the .::ata extracted fror.i
the County's model. We will review the counts an::i ~he method of
validation in light of land use and transportation s1ste"l changes that
have occurred since the developme;it of the Coun:y's r.iodel in 1975.
Task 5
The County model projects traffic volumes for the yea; 1990, based on
projections of socioeconomic conditions in each zo.'le throughout the
County. The City analysis started with the County·.vide data projections,
provided more definitive projections for Zone 10, a:-:d synthesized a·
forecast for the Cupertino area. The steps taken and conclusions
reached in this process will be identified and eval'-!a~ed.
A 30-percent progress report will be prepared at this stage. It will be
in the form of a technical 111emorandum that will document the results of
the review thus far and recommend any changes that may be necessary
in succeeding work tasks. If desired, a working session with the
Subcommittee will also be held at this time.
Task 6
The County's model deals with a.m. traffic because it is comprised of
single-purpose home-to-job trips. Evening traffic volumes tend to be
higher, however, due to the ad di ti on of school, shopping, and other
special purpose trips to the returning job-to-horie trips.
1
I
Si nee the higher traffic volumes dictate physical or operational improve-
ments, the City converted the a.m. traffic to p.m. conditions through a
series of assumptions and calculations. We will review the methodology
used by the City and comment on the validity and reliability of the
volumes obtained.
Task 7
The City, in association with Caltrans and MTC, performed a license
plate survey to determine the type of trips comprising the p.m. traffic
on Cupertino streets. The results of this study will be carefully reviewed
since it involved a division of Zone 10 into two sub-zones and required
a number of assumptions and special studies.
Task 8
The City's study relied heavily on baseline data contained in the County's
model. For a number of reasons this data could not be used directly
but required modification or conversion to more closely represent local
conditions. The conclusions reached by the City in using the baseline
data and the rationale for its continued use will be closely investigated.
The practicality and reliability of using the data will be addressed.
Task 9
We will review the need for a f:lOstcard survey study to further verify
the City's traffic analysis. Whether it should be in the a.m. or p.m.,
the location of control points and the type of inforr.lation to be obtained
cannot be clearly defined at this time, but will deve:op as the review
progresses. Once the parameters for the study are known, the cost
and potential benefits of a postcard survey can be de~er:11ined.
Task 10
To the ext en ~ po s s i b I e us in g ex i st in g i n fo rm a ti on , v, e w i II p e r for r.1 a
sensitivity analysis to determine the relative accuracy of the techniques
used by the City to account for changing conditions. \Vhere appropriate,
we will identify high and low side limits and controlling factors that may
tend to reduce the potential impacts on traffic generation caused by
rela~ed socioeconomic changes.
At this point, a 70-percent progress report will be prepared summarizing
the results and findings of the Phase I revievv. A working session with
the Subcommittee may also be held.
PHASE 11 STUDY
This study will review and evaluate the work performed by the City in
the preparation of the second half Traffic Study Report {unpublished to
date) .
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Task 1
The review effort in this task will be directed at the process of analyzing
differences in traffic conditions based on two land use scenarios. Since
most of the analysis work by the City for this phase will be based on
the framework established in Phase I, the full set of review tasks
out Ii ned above wi 11 not be necessary. Rather, a close look wi 11 be
given to the type and location of land use changes, the assumptions
regarding generation and distribution of traffic associated with the
changes, and the impacts to major streets as a result of new or relocated
traffic.
Task 2
This task will review the analysis of alternatives for specific facilities in
the Cupertino roadway network. Speci flcal ly, we wil I review the impact
analyses prepared by the City for the fol lowing major traffic areas:
o Route 85 corridor within Cupertino
Roadway to De Anza Boulevard/Prospect only
Express>vay to Highway 101
Freeway to Highway 101
o Stevens Creek and De Anza intersection
Grade separation
At-grade signal and improved channelization·
o \Vest Cupertino neighborhood areas
Stel Ii ng Road
Bubb Road
Bollinger Road
o Vallco Park area
o Other major intersections throughout the City now at LOS 11 E''
or worse
Task 3
In this task we will review the roadway improvement programs developed
by the City for both of the land use scenarios. The appropriateness
and relative effectiveness of the conceptual improvements along with
their order of magnitude costs will be reviewed.
Upon completion of the Phase II review a final report will be prepared,
incorporating the two previous progress reports and the results of the
Phase 11 study. The report will summarize the process used in preparing
the City's traffic study. It will point out the study's strengths and
weaknesses, and areas where additional work should be done to validate
or correct parts of the previous work. The report wil I also outline the
steps necessary for continued monitoring, updating, and use of the
City's traffic model.
Potential Additional Work
If it is determined that the City's Traffic Study Report is valid, and
reasonably represents existing and future conditions in Cupertino, we
can provide additional assistance in producing a final report document.
The final report should provide a complete description of the study
process, including the verification effort. It should contain a sequence
of clear, logical graphics (figures, charts, tables, etc.) to supplement
the written text. Appropriate technical appendices may be included.
The document should be printed on high quality paper and bound in an
attractive, durable manner befitting the professional work it represents.
One of the apparent shortcomings of the City's traffic model is that it
is a manual model. It is based on a sequence of mathematical and
conceptual modifications that have been performed by hand. As such it
is very difficult to duplicate, making it equally hard to update or to
evaluate alternatives. The model would be far more useful to the City
if it were computerized in a manner similar to the County's model, but
including more specific information for a smaller area in and around
Cupertino.
Although we have not included it in our proposa~, we have provided
information below on two of CH U1 HI LL' s computer programs .that would
be ideally suited to the modeling and analysis of traffic conditions in
Cupertino. A general description of the programs fol lows:
o ASSIG,"i, developed fo'r a microcompu~er, facilitates the analysis
of existing and/or projected trip generation, distribution, and
assignment characteristics for any surface street network of
up to 150 zones and 1,500 links. Trip distribution patterns
are determined through application of a gravity model, and
the assignment is accomp Ii shed th rough a modi fled a ppl icati on
of the Moore minimum time path algori~hr:i. Output includes
directional volumes on each link, turnins; movement patterns
at any user-specified intersection, and se!ect link analysis
capabiJity. Most of the input data recuired by this model are
available from previous traffic and land use work performed
by the City.
o CMA, also developed for a microcomputer, is capable of deter-
mining the lev.el of service and degree of saturation for any
signalized intersection in accordance with the Critical Movement
Analysis technique.* The program is sensitive to lane config-
uration, sign al phasing, percentage of trucks in the traffic
stream, pedestrian activity, signal cycle length, peak hour
factor, and turning movement patterns. The program will
also perform a check of left-turning movements to ensure that
they can be adequately accommodated.
*Transportation Research Boa rd, "Interim ,\\a teria'. s on
Highway Capacity," Transportation Research Circulat 212 ( 1980).
0 u r trans po rt at ion p I a n n er s a n d I a n d us e p I a n n er s a re fa mi I i a r w i th the
input requiremens of these programs and can quickly and efficiently
develop the in.puts through a close working relationship with City staff.
Both of these programs are written in BASIC language and are currently
being run on a portable APPLE 11 Plus microcomputer with 48K memory
and one disk drive. A distinct advantage of these programs is that the
required hardware is commercially available, easy to use, and relatively
inexpensive. Another advantage is that these programs ensure consis-
tency among different alternatives and making it easy to review a wide
range of plan scenarios and roadway systems. If these programs are
used, CH2M HI LL will --upon completion of the project --provide the
software and accompanying documentation to the City for use in future
updates or revisions. If technically possible, we will modify the software
for com pa ti bi Ii ty with the City's existing microcomputer system.
·~ &Ill SCHEDULE AND FEE
SCHEDULE
The proposed study can be divided into three separate parts. The
first two parts wil I each end with a progress report and the third part
will conclude with the final report. Our proposed schedule is shown
below. We are prepared to begin work within 1 week of an official
notice to proceed.
PH A SE I -TASKS 1-5: 30-Percent Progress Report 2 weeks
City I Subcommittee Review 1 week*
PHASE I -TASKS 6-1 0: 70-Pe rcent Progress Report 2 weeks
City I Subcommittee Review 1 week*
PH ASE 11 -TASKS 1-3: Final Report 2 weeks
Final Presen~ation week*
9 weeks
*Or as required to match .regularlyf scheduled Transportation
Subcommittee meetings.
ESTL\iA TED FEE
In accordance with the Request for Proposal we have provided a brea~
down of hours required for each task and a fee for each phase of the
study. The hours shown are for professional staff assigned to the
various tasks. The fee is based on the estimated number of hours each
team member is assigned to each task. The hourly rate for each member
is based on our standard San Francisco region fee schedule. The
average hourly rates will vary for each task, due to differences in the
amount of assigned time for each staff grade. Our actual charges for
the project would be made on a time-and-materials basis, with a maxi mum
project limit of $14,700.
MAN-HOURS AND FEE
Task Man-Hours Labor Cost
PHASE J-1 20 $1,170 ........
2 6 400
3 14 870
4 1 2 650
5 20 1, 2 60
6 1 0 680
7 8 470
8 6 400 ~
9 2 1 40
10 28 1 f 630
TOTAL LABOR 1 26 $ 7,670
EXPENSES 730
TOTAL: PHASE I $ 8,400
PHASE J 1-1 28 $1,740/
2 28 1 I 740
3 36 2,250
TOTAL LABOR 92 $ 5 I 730
EXPENSES 570
TOTAL: PHASE 11 s 6,300
PROJECT TOTAL (Not to Exceed) 514,700