HomeMy WebLinkAbout1991-03-13 - AGENDA REPORTS - GP TRAFFIC MODELING (2)AGENDA REPORT
City Manager
Item to be presented 'b`y:. "
CONSENT CALENDAR
DATE: March 13, 1991
SUBJECT: General Plan Traffic Modeling
DEPARTMENT: Community Development
BACKGROUND:
In November, 1990 the General Plan Advisory Committee transmitted to the City
Council the preliminary draft General Plan with the exception of the
Circulation Element and a final review of the Land Use Element. It was
determined at that time that additional traffic modeling work was necessary in
order to arrive at a satisfactory circulation plan and complete the
Circulation Element.
The primary General Plan consultant, Michael Brandman Associates, had retained
the sub -consultant services of Kunzman Associates to assist in the preparation
of the Circulation Element and the necessary traffic modeling work. Due to
staffing reorganization and other difficulties, Michael Brandman Associates
has now retained the services of another traffic consultant firm,
KHR Associates. This traffic consultant firm has reviewed all materials
relative to the draft Circulation Element and has produced a revised draft
Circulation Element which is currently being reviewed by City staff. This
firm, however, does not do computerized traffic modeling work and Michael
Brandman Associates had been unable to secure the services of a traffic
consultant firm to conduct this task.
In order to move forward, therefore, the City Attorney and the Community
Development Director have determined that it is necessary to directly contract
with a qualified traffic consultant firm to complete the traffic modeling
effort. We have.been in contact with the firm of DKS Associates of Los
Angeles who is a well known traffic engineering firm and the authors and
copyright holders of the TRANPLAN computer model. In the interest of time,
work has already begun on the modeling.
The attached contract for traffic modeling services has been prepared by
DRS Associates and the Community Development Department and is now ready for
execution by the City. The contract provides for review of existing
previously produced traffic modeling efforts, assignment of traffic generated
from the land uses on the draft 'General Plan onto the future highway network,
analysis of circulation deficiencies and analysis of three additional traffic
model alternatives for an initial fee ceiling of $28,000.00.
APPEOVjAgenda Item;�
General Plan Traffic Modeling
March 13, 1991
Page 2
The contract indicates that the first three tasks can be accomplished within a
six week time frame but that the duration of the fourth task, which analyzes
traffic model alternatives, will depend on the number of alternatives to be
tested. Following review and receipt of the traffic modeling work, a meeting
will be scheduled with the General Plan Advisory Committee (GPAC) for their
recommendation on the master circulation plan and any refinements necessary to
the Land Use Map. The Planning Commission will then be able to complete their
review of all General Plan elements and transmit their recommendation to the
City Council. We now anticipate that the beginning of City Council hearings
will occur in May. A copy of the new proposed schedule for General Plan
adoption is attached.
At least a portion of the work contemplated in this contract is currently
contracted for and is the responsibility of the primary General Plan
consultant, Michael Brandman Associates. Further, the need for supplemental
studies as an outgrowth of preparation of the General Plan was anticipated in
the budget and, therefore, no additional appropriation of funds is requested
for this contract.
RECOMMENDATION:
It is recommended that the City Council authorize the City Manager to execute
the contract between DKS Associates and the City of Santa Clarita for General
Plan traffic modeling services.
ATTACHMENT:
Proposed Contract
Proposed Schedule
L14H:CLT:1f:240
Associates
411 West Fifth Street
Suite 500
Los Angeles, CA 90013
12 731 527 0419
February 19, 1991
Mr. Ed Cline
Traffic Engineer
City of Santa Clarita
23920 Valencia Blvd., Suite 300
Santa Clarita, CA 91355
RE: City of Santa Clarita Modeling Services
Dear Mr. Cline:
A91x1016
It was a pleasure meeting with you, Ms. Harris and Ms. Trinkley on Thursday, February 14.
We appreciate your consideration of DKS Associates to assist the City of Santa Clarita and the
transportation consultant for the Circulation Element of the General Plan to interpret the City's
• TRANPLAN travel demand model and to produce traffic forecasts required for the General
Plan.
Development of a Citywide travel demand model involves a significant amount of work. In the
case of Santa Clarita's model, based on a review of the provided material, it appears that an
appropriate framework.has been established. In addition to the task at hand (General Plan
requirements), this model can be a valuable tool for your City's future transportation
infrastructure planning given the proper care, appropriate input and correct interpretation of
results to produce defensible forecasts.. In'the interest of your immediate needs, however, the
following proposed scope of services is designed to provide you with a fast -tracked effort which
involves a quick review and interpretation of the existing model and development of traffic
forecasts related to the general plan circulation element work.
Task 1 ' Review of Existing TRANPLAN Model Structure and the Existing Validation Run.
Model structure and job stream setups will be reviewed for data input, trip
generation, trip distribution, including external/internal and external/external travel
definitions, and traffic assignment procedures. The results of the existing base -year
validation run will be examined. By focusing on the worst calibrated screenlines and
problem areas, obvious errors and/or problems will be identified and corrected.
Adjustments may be made to trip generation rates, facility capacities and/or speed
assumptions, centroid connectors, cordon value assumptions, land use input data, or
others. In the interest of time,. no new major model validation effort will be
performed. Results of the review and details of any adjustments implemented will
. be documented in a technical memorandum.
Mr. Ed Cline
February 19, 1991
Page 2,
Task 2 Future Base -Year Assignment. This is the future no -build scenario. A model run
will be performed based on the proposed general plan land useand the existing plus
funded (committed) future highway network scenario. It is assumed that City staff,
and Circulation Element consultants (KHR) will provide information on the land
use forecasts for trip generation input (digitized land use quantities by zone) and
future base network assumptions. DKS will code the network to reflect the future
scenario and will input land use information to produce traffic assignments. Results
will be presented to the City in the form of computer plots and traffic assignment
outputs showing link volumes, speeds; volume/capacity ratios and systemwide variables
such as total vehicle miles traveled, delay and miles of congestion.
Task 3 Analysis of Circulation Deficiencies. With assistance from KHR, DKS will identify
future problem areas and "hot spots" as well as circulation and capacity deficiencies
on the base network as a result of the forecast land use growth without the
corresponding transportation improvements. Potential alternative solutions to
capacity problems will be identified for consideration. The solutions may include.
circulation system improvements, new road connections, as well as capacity additions
on the existing facilities, or other non-physical mitigation measures such as trip
reduction strategies including land use intensity reductions or travel demand
management policy recommendations. With consideration for physical, environmental
or other constraints, a series of specific system improvements will be recommended
for testing in alternative model runs. Results of this task will be documented in a
technical memorandum accompanied with maps indicating specific facility
improvement needs to be tested.
Task 4 Analysis of Alternative Scenarios. Using the results of the previous task, and with
input from the GPAC, other consultants and City staff, a number of alternative
improved systems will be designed. Specific facility improvements will be grouped
into a selected number of logical packages and corresponding networks will be
coded for modeling. Traffic forecasts will be produced through the TRANPLAN
model runs. For budgeting purposes a total of 3 network and land use combination
scenarios are assumed. Results of this task will be presented in a technical
memorandum detailing the outcome of the model runs complete with facility and
systemwide characteristics and accompanying plots and figures.
Upon receipt of a signed agreement, DKS will begin work on this project on Monday,
February 25. The first three tasks can be accomplished within six weeks from the start of the
project, provided that all land use and network input data is supplied to DKS by Monday,
February 25. Duration of task 4 will depend on the number of alternatives to be tested. DKS
will participate at City Council, GPAC and Planning Commission meetings to make presentations
and discuss the results (a maximum of six formal meetings are budgeted), and will participate
at other project progress meetings with City staff as required
Mr. Ed Cline
February 19, 1991
Page 3
In consideration of the performance of these services, DKS Associates will be compensated on
a time and materials basis in accordance with the hourly billing rates set forth in the attached
fee schedule, subject to revision June 1, 1991. Based on a review of the material provided to
us, we have developed a preliminary assessment of the required level of effort to accomplish
each task as reflected in the attached table. We are proposing to establish an initial fee ceiling
of $28,000 covering the four tasks.This fee includes the cost of.all related technical and
administrative services as well as attending all meetings. Cost of Task 4 will depend upon the
number of alternative scenarios to be tested. For budgeting purposes it has been assumed that
a total of three scenarios will be tested. It should be noted that this order of magnitude cost
estimate was developed prior to a more detailed examination of the model structure and
specifics. It is, therefore, based on a typical level of effort required for similar projects.
Following the review of the model structure and completion of Task 1, we would like to develop
a revised cost estimate for tasks 2 and 3 and a more detailed cost estimate for each scenario
for task 4.
DKS will invoice you every four weeks based upon the time and materials expended Payments
are due on a net 30 day basis. A service charge of the lesser of 1-1/4% per month or the
maximum allowable by law will be assessed on billings not paid when due.
• Should the work not be authorized in thirty (30) days; or should changes occur in the work
scope or level of effort; or should the completion date extend beyond the date stated above due
to circumstances beyond DKS's control; we reserve the right to revise the work scope, budget
and schedule to reflect current conditions. Such revisions will be effected through mutually
agreed upon 'amendments' or 'modifications' to this agreement.
Sincerely, Approved By
DKS ASSOCIATES City of Santa Clarita
A California Corporation
Leo K. Lee, PE, Principal By:
Director of Los Angeles Operations
Viggen Davidian, PE Title Date
Assistant Director of
Los. Angeles Operations
• 1 •
Proposed Budget
City of Santa Clarita
Travel De®rd Modeling Services
Labor Costs
1.0 Model Structure and Validation Run Rev
2.0 Future "No Build" Model Run
3.0 Analyze System Deficiencies
4.0 Testing of Alternative Systems
Meetings and Presentations
Direct Costs
Computer
Travel
Other
Subtotal
10% on CDC
Total ODC
Grind Total Cost Estimate
20 -Feb -91
Estimated Hours by Staff Person
Hourly Rate*
100
1 70
1 50
1 55
Total
Hours
Total
Budget
S[aff person
Devi di
Pari
Chou
Supp't
ieu
16
24
24
8
72
4,920
10
16
16
8
50
3,360
10
16
16
8
50
3,360
24
48
48
8
128
8,600
16
16
16
8
56
3,960
76 120 120 40
356
$24,200
1,694
500
1,200
3,394
339
$3,733
527,933
0
0
0
DKS Associates
Fee Schedule
Effective June 1, 1990 through June 1, 1991
ENGINEERS and PL4NNERS
Hourly Rate
Grade 1
$ 40.00
Grade 2 ..........................
80.00
Grade 3
50.00
Grade 455.00
... .... ,,.._........ ... .........
Grade 5
60.00
Grade..6......._.................._..._..
..._.........I............65A0
Grade 7 70.00
Grade -8....................... .....................................
..... . 75.00
Grade 9
80.00
Grade 10
...............
....................................................................................
85.00
Grade 11
90.00
Grade12 95.00
_
......._..._
..........,........_...........................................
Grade 13 100.00
Grade 14 105.00
Grade 15 . 110.00
Grade 16..........................................115.00
.......................................
Hourly Rate
Grade 17
120.00
Grade 18125.00
......................................................................................................
......................
Grade 19
130.00
Grade 20
135.00
TECHNICIANS and SUPPORT STAFF
Tech._Level _H ................................................_55.00
Hourly Rate
Tech Level A
$ 20.00
Tech_Level... .............................
......................
Tech Level C
30.00
Tech_I.e.%el.. D......., . __ .................._..........
35.00
Tech Level E
40.00
Tech Level F ..............................................0.
45. 0
Tech Level G
50.00
Tech._Level _H ................................................_55.00
Tech Level I
60.00
Tech.. Level J
..........................................................................
65.00
Tech Level K
70.00
Tech Level ..L ............._........_......._.._............75.00
I........I............... .
Tech Level M
80.00
Project expenses will be billed at cost plus ten percent for service and handling. Project expenses
include project -related costs such as transportation, subsistence, reproduction, postage, telephone,
computer charges and subcontractor services.
All invoices are due and payable within 30 days of date of invoice. Invoices oustanding over 30
days will be assessed a 1'/. percent service charge, not to exceed the maximum allowable by law,
for each 30 days outstanding beyond the initial payment period. Service charges are not included
in any agreement for maximum charges.
Expert witness charges are available on request.
Revised OSMSM - OKSSFfeWA
•
0
0
GENERAL PLAN ADOPTION DRAFT
PROPOSED .SCHEDULE
February 28, 1991
DATE ACTIVITY
03/05/91 P.C. continued hearing on General Plan.
- Public Services, Facilities and Utilities
Element
- Preliminary overview and testimony on Land
Use Element
Overview of Growth Management issues,
relationship to General Plan
03/19/91 PC continued hearing on General Plan.
- Land Use Element text
- Economic Development and Community
Revitalization Element
PC hillside Study Session (tentative).
03/20/91 Open forum, Growth Management. (StaffHost)
03/28/91 PC public hearing.
- Land Use Element, text and map
- Ridgeline Preservation and Hillside
Development Ordinance.
04/02/91 PC continued hearing on General Plan.
- Consider unresolved/outstanding items
- Finalize direction to a taff on all
elements except Land Use and Circulation
04/24/91 GPAC deeting to review Circulation and Land
Use Elements with modelling results.
04/25/91 PC continued public hearing.
- Receive GPAC recommendation and finalize
recommendation on Circulation and Land Use
Elements
- Finalize/confirm recommendations
- All previously recommended changes
incorporated into draft General Plan;
transmit to CC with rec. on Circulation
and Land Use Elements
DATE ACTIVITY
10 04/30/91 CC/PC joint meeting on General Plan.
05/14/91 Begin CC hearing.
Chapters 3 and 4; Resources Management and
Hazard Management.
- Open Space and Conservation Element
- Air Quality Element
- Noise Element
- Safety Element
05/28/91 City Council hearing (continued).
Chapter 2, Infrastructure and Community
Services.
- Circulation Element
- Human Resources Element
- Public Services, Facilities and Utilities
Element
- Parks and. Recreation Element
06/05/91 City Council Study Session.
0 - Sphere of Influence Request to LAFCO.
06/11/91 City Council hearing (continued).
Chapter 1, Community Development.
- Land Use Element
- Housing Element
- Community Design Element
- Economic Development and Community
Revitalization Element
06/25/91 City Council continued hearing.
CLT:lkl:238
- Consider all unresolved items.
- Finalize action, adopt plan.
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I
DATE
03/05/91
GENERAL PLAN ADOPTION
PROPOSED SCHEDULE
February 28, 1991
ACTIVITY
P.C. continued hearing on General Plan.
- Public Services, Facilities and Utilities
Element
- Preliminary overview and testimony on Land
Use Element
- Overview of Growth Management issues,
relationship to General Plan
03/19/91 PC continued hearing on General Plan.
- Land Use Element text
- Economic Development and Community
Revitalization Element
PC hillside Study Session (tentative).
03/20/91 Open forum, Growth Management. (Staff Host)
03/28/91 PC public hearing.
- Land Use Element, text and map
- Ridgeline Preservation and Hillside
Development Ordinance.
04/02/91 PC continued hearing on General Plan:
- Consider unresolved/outstanding items
- Finalize direction to staff on all
elements except Land Use and Circulation
04/24/91 GPAC meeting to review Circulation and Land
Use Elements with modelling results.
04/25/91 PC.continued public hearing.
- Receive GPAC recommendation and finalize
recommendation on Circulation and Land Use
Elements
- Finalize/confirm recommendations
- All previously recommended changes
incorporated into draft General Plan;
transmit to CC with rec. on Circulation
and Land Use Elements
DATE
ACTIVITY
04/30/91
CC/PC joint meeting.on General Plan.
05/14/91
Begin CC hearing.
Chapters 3 and 4, Resources Management and
Hazard Management.
- Open Space and Conservation Element
- Air Quality Element
- Noise Element
- Safety Element
05/28/91
City Council hearing (continued).
Chapter 2, Infrastructure and Community
Services.
- Circulation Element '
- Human Resources Element
- Public Services, Facilities and Utilities
Element
- Parks and Recreation Element
06/05/91
City Council Study Session.
- Sphere of Influence Request to LAFCO.
06/11/91
City Council hearing (continued).
Chapter 1, Community Development.
- Land Use Element
- Housing Element
- Community Design Element
- Economic Development and Community
Revitalization Element
06/25/91
City Council continued hearing.
- Consider all unresolved items.
- Finalize action, adopt plan.
CLT:lkl:238
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