TR9302-CS 920228Barton-Aschman Associates, Inc.
5485 Belt Line Road, Suite 199 Phone: (214)991-1900
Dallas, Texas 75240 Fax: (214) 490-9261
USA Metro: 263-9138
February 28, 1992
Mr. Kenneth M. Griffin, P.E. TL,~ ,~
city Engineer
City of Coppell
P.O. Box 478
Coppell, TX 75019
RE: Proposal to provide Engineering Services Associated with the Traffic Light
Synchronization Program II
Dear Mr. Griffin:
Barton-Aschman Associates, Inc. is pleased to submit this proposal to provide professional
transportation engineering services associated with the Traffic Light Synchronization Program
II (TLS II). We have prepared a scope of services and fee estimate based on the TLS II
approved grant application and our recent discussions with City staff.
If accepted, this letter will become an agreement between the City of Coppell (City) and
Barton-Aschman Associates, Inc. (BA) to provide the services outlined in the Scope of
Services presented below:
SCOPE OF SERVICES
Our Scope of Services includes the work described in the following tasks and encompasses
the work effort involved to complete the City of Coppell's TLS II traffic signal retiming and
signal system implementation project:
TASK 1: COMPILATION OF DATA BASE
Purpose: Assemble traffic data and information to form a sound basis for subsequent
analysis during the conduct of the study.
,4ctivit/es:
1.1 Review existing timing sheets, 24-hour machine counts, and planned
improvements.
1.2 Verify data with field observations of each intersection during peak traffic
periods.
1.3 Field check existing traffic signal control equipment.
Mr. Kenneth M. Griffin, P.E.
February 28, 1992
Page 2
1.4 Determine existing intersection geometrics, lane usage and link distances for
computer input.
1.5 Collect two-hour, turning movement counts (TMC's) during AM, Off, and PM
peak periods.
1.6 Conduct floating car study (travel time and delay study).
Output:
1. Completed data base for subsequent analysis.
TASK 2: QUALITY OF SERVICE SUMMARY
Purpose: Verify network descriptions and characteristics developed in Task 1; reconcile
any significant discrepancies between simulations of existing conditions and
observed performance of the "Before" travel time runs; summarize existing
evaluation data for future comparison with final timing plans.
Activities:
2.1 Code data into TRANSYT-7F or PASSER II signal optimization/simulation
program.
2.2 Simulate existing conditions and analyze performance reports.
2.3 Calibrate models to reconcile any significant (greater than 20%) discrepancies
between observed and calculated performance measures.
2.4 Prepare "Before" study as per State requirements.
2.4.1 Summarize data collection efforts, calibration study and computer simulation
performance measure outputs into a "Before" conditions report.
2.4.2 Calculate and incorporate the annual operating costs into the "Before" study
report. Annual operating costs are based on delay, stops and fuel consumption.
2.4.3 Submit two (2) draft copies of the "Before" study report to the City for review.
2.4.4 Revise report, as needed, and submit seven (7) copies of final report.
Mr. Kenneth M. Griffin, P.E.
February 28, 1992
Page 3
Output:
1. Timing models calibrated to existing conditions.
2. Signal timing analysis completed for the "Before" field evaluation.
3. "Before" study report.
TASK 3: IMPLEMENTATION OF CLOSED LOOP SIGNAL SYSTEM CAPABILITIES
Purpose: Prepare all documents necessary for a complete bid package.
Activities:
3.1 Meet with City to discuss equipment procurement and installation plan.
3.2 Prepare construction plans, specifications, and estimates (PS&E) for control
upgrades and interconnect cable installation along Denton Tap Road.
3.3 Develop functional specifications for system microcomputer.
3.4 Assist City with bid procurement.
3.5 Assist with construction/implementation engineering and documentation.
Output:
1. Plans and specifications.
2. Quantity and cost estimates.
3. Project bid document.
TASK 4: TIMING PLAN DEVELOPMENT
Purpose: Prepare recommended timing plans for implementation.
Act/v/t/es:
4.1 Using PASSER II, prepare up to three (3) optimized timing plans.
4.2 Prepare table of cycle lengths, offsets, and splits for review by City staff.
Mr. Kenneth M. Griffin, P.E.
February 28, 1992
Page 4
4.3 Submit preliminary timing plan results and performance measures to the City
for review.
4.4 Meet with City staff to discuss preliminary timing plans including cycle lengths,
phasing patterns, and system coordination.
4.5 Incorporate comments into timing plans and, if necessary, make additional
optimization run.
Output:
1. Timing plans including coordinated systems, cycle lengths, offsets, splits, and
other timing data.
2. Recommended timing plans for implementation and fine-tuning.
3. Summary of performance measures for preliminary timing plans.
TASK 5: ASSISTANCE IN PROJECT MANAGEMENT
Purpose: Assist City in management of the TLS II Project.
Activit/es:
5.1 Provide on-going assistance and advice on fulfilling State TLS II requirements.
5.2 Provide input for the TLS II quarterly progress reports.
Output:
1. Progress reports and technical memorandums on meeting State TLS II
requirements.
TASK 6: ASSISTANCE IN TIMING IMPLEMENTATION AND ADJUSTMENT
Purpose: Assist City/Contractor in implementing and fine-tuning the recommended signal
timing plans.
Activit/es:
6.1 Provide technical assistance to the City during the implementation phase of the
project.
6.2 Check performance measures and time-space diagrams against actual field
observations.
Mr. Kenneth M. Griffin, P.E.
February 28, 1992
Page 5
6.3 Fine-tune timing plans in field with City staff, as needed, to account for real
world situations.
6.4 Document adjustments on revised timing cards for subsequent analysis.
Output:
1. Implemented and fine-tuned signal timing plans.
2. Completed implemented timing plan report.
TASK 7: 'AFTER'STUDY ANALYSIS
Purpose: Conduct "After" study data collection, simulation and analysis for comparison
with "Before" study results.
Activities:
7.1 Summarize all implemented improvements for subsequent analysis (i.e. - fine-
tuned timing plans, new pedestrian equipment, changes in intersection
approach lane assignments, new controller equipment, etc.).
7.2 Summarize "After" study travel time runs.
7.3 Prepare computer simulation of fine-tuned timing plans.
7.4 Calibrate fine-tuned simulation runs to reconcile any significant (greater than
20%) discrepancies between observed and calculated performance measures.
Output:
1. Memorandum summarizing, all implemented improvements.
2. Fine-tuned timing models calibrated to existing conditions.
TASK 8: FINAL DOCUMENTATION
Purpose: Document procedures, findings, conclusions, and benefits of optimization
study.
Activities:
8.1 Summarize phasing, cycles, splits off-sets, time-space diagrams and measures
of effectiveness developed in Task 7.
Mr. Kenneth M. Griffin, P.E.
February 28, 1992
Page 6
8.2 Calculate annual vehicular operating costs of each sub-system.
8.3 Prepare "After" field evaluation report and compare to the results of the
"Before" study report.
8.4 Submit two (2) copies of preliminary "After" study report to the City for
review.
8.5 Incorporate City comments into a final "After" study report and submit seven
(7) copies to the City.
8.6 Prepare press release presenting benefits of optimization study.
8.7 Submit to the City all data collected; computer diskette(s) containing
TRANSYT-7F and/or PASSER II runs, calibration spreadsheets, AutoCAD
system drawings and reports.
8.8 Prepare an Executive Summary detailing all activities as well as the benefits and
costs of the project.
8.9 Make presentation to City Council and other interested groups, if requested.
Output:
1. "After" study report summarizing comparison of "Before" and "After"
conditions.
2. Computer model data for future timing optimization studies.
3. All supporting documents for City records.
4. Presentation materials.
MEETINGS
For the purpose of our budget and fee estimate, we have identified six (6) formal meetings
with the City. Additional meetings authorized by the City will be billed on a cost basis and
are not reflected in our fee estimate.
DELIVERABLES
BA will deliver the following products:
1. Two (2) copies of the Draft "Before" Study.
2. Seven (7) copies of the Final "Before" Study.
Mr. Kenneth M. Griffin, P.E.
February 28, 1992
Page 7
3. Three (3) blueline copies of Preliminary of PS&E.
4. One (1) reproducible copy of two(2) blueline copies of "as-built" plans.
5. Two (2) copies of the Draft "After" Study.
6. Seven (7) copies of the Final "After" Study.
7. Submit to the city all data collected; computer diskette(s) containing TRANSYT-
7F and/or PASSER II runs, calibration spread sheets, AutoCAD system drawings
and report files.
RESPONSIBILITY OF THE CITY
The City will provide the following to BA:
1. Existing paving or construction plans or the project locations.
2. Existing traffic signal and phasing data for each study intersection.
3. Review comments.
PROJECT STAFF
Donald R. Glenn, P.E. will serve as the Project Manager. K.R. Marshall, P.E. will provide
design guidance and serve as the Project Director. Appropriate design and support staff
personnel will assist.
SCHEDULE
The schedule for Tasks 1 through 8 will adhere to the one outlined by the Texas Department
of Transportation (TxDOT) for the TLS II applicants. The proposed schedule for the Coppell
TLS II project is shown in Attachment A.
FEE FOR SERVICES AND METHOD OF PAYMENT
The fee for completing the project will be based on our hourly rates for staff personnel,
current at the time of performance, for staff services rendered. Attachment B gives the time
and fee estimates on an individual task basis for the proposed Scope of Services.
Reimbursable expenses are also given. The maximum fee and expenses for completion of
Task 1 through 8 will not exceed e22,075 without receiving prior written authorization from
the City.
The fee for extra services, meetings, work sessions, and presentations (and work in additions
to the tasks indicated in the Scope of Services ) will be billed separately based on our hourly
rates for staff time and expense.
Direct reimbursement for out-of-pocket expenses such as mileage, reproduction, etc., will be
billed at cost and will be added to the staff time costs incurred on the project.
Mr. Kenneth M. Griffin, P.E.
- February 28, 1992
Page 8
Invoices will be submitted monthly and will indicate charges incurred during the preceding
month. Billings are due and payable within thirty (30) days of invoice date. A one and one-
half (1.5) percent carrying charge will be added each month to all past due accounts.
AUTHORIZATION
We are prepared to initiate work on this project upon receipt of a signed copy of this Letter
of Agreement. This proposal will remain valid for thirty days.
We appreciate the opportunity to submit this proposal and look forward to assisting you on
this project. If you have any questions regarding this proposal, please do not hesitate to call.
Sincerely,
BARTON-ASCHMAN ASSOCIATES, INC. ACCEPTED AND APPROVED BY:
Donald R. Glenn, P.E.
Senior Associa~ (Signature)
/ '/
Gary D~Jq~t, P.E.
Principal Associate (Printed or Typed Name)
DRG\GDJ:tdb
(Title)
AUTHORIZED TO EXECUTE
AGREEMENTS FOR:
Date: (Organization)
(Title)
ATTACHMENT B ~ ~
ENGINEERING FEE ESTIMATE
Coppell TLS II Project
Category Hours I Rate Total
DIRECT LABOR
Project Director 18 $31 $ 558
Project Manager 107 $ 23 $ 2,461
Engineer 1 22 $18 $2,196
Office Technician 20 $17 $340
Drafter 26 $17 $442
Clerical 23 $12 $276
TOTALS 3,161 I I $6,273
LABOR OVERHEAD
1.855 $11,636
FEE
10% $1,791
DIRECT EXPENSES
Traffic Counts $950
Mileage $175
Printing, Telephone, etc. $500
Computer Costs $750
TOTAL I $22,075