HomeMy WebLinkAboutTIS 2025-08-25 Item 1D - Contract Amendment #2 - Traffic Signal Assessment & Repair Recommendations with KPG PsomasTO:
FROM:
BY:
CC:
DATE:
SUBJECT:
Thomas McLeod, Mayor
Public Works Department - Jen Tetatzin, PE, PMP - Director
INFORMATIONAL MEMORANDUM
Transportation and Infrastructure Services Committee
Jen Tetatzin, Public Works Director
Adam Cox, Interim Traffic Engineer
Mayor Thomas McLead
August 22, 2025
Traffic Signal Assessment and Repair Recommendation Amendment #2
ISSUE
Authorization to award Amendment #2 of the Traffic Signal Assessment and Preventative Maintenance
Program contract.
BACKGROUND
The City is responsible for 64 signalized intersections that require routine maintenance and occasional
repairs in response to damaged infrastructure. While updating the required timing sheets for each
intersection during the traffic signal assessment, it was observed that a pedestrian clearance timing
study was required. This study analyzed the signal phase timing to ensure they account for the
additional pedestrian crossing times recommended by the Manual for Uniform Traffic Control Devices
(MUTCD). The pedestrian clearance timing study was performed as part of the scope of work in
Amendment No. 1.
ANALYSIS
Amendment #2 will update and reconfigure the City's traffic signal system to reflect the new pedestrian
crossing times identified in Amendment #1. The scope of work includes:
• Reviewing and updating the Tactics central database to ensure accurate configurations for all 34
intersections.
• Adjusting signal coordination plans at 24 intersections to function properly with longer pedestrian
clearance times.
• Conducting a peer review of programming at 10 intersections where new M-60 controllers
replaced older models, to ensure all settings were preserved.
• Providing follow-up support to integrate the system with Lucity, establish remote access, and
perform field testing.
The City does not have the in-house expertise for these specialized updates, and consultant support
from Psomas is required to complete the work.
FINANCIAL IMPACT
Amendment No. 2 will use the available funds programmed for the CIP Annual Traffic Signal Program
Project: 80010404.
Psomas Services
Amendment #1
Amendment #2
Total:
Cost
$176,622.00
$44,748.00
$59,876.00
$281,246.00
ARPA Funds
ARPA Funds
CIP Project 80010404
Funding
$176,622.00
$44,748.00
$59,876.00
$281,246.00
Tukwila City Hall • 6200 Southcenter Boulevard • Tukwila, WA 98188 • 206-433-1800 • Website: TukwilaWA.gov
39
Traffic Signal Assessment and Repair Recommendation Amendment #2
August 22, 2025
Page 2
RECOMMENDATION
The council is being asked to approve Amendment No. 2 for $59,876 to perform the additional scope of
services.
Attachments:
Amendment No. 2
Exhibit A — Scope of Services
Exhibit B — Cost Computations
Phone: 206-433-1800 • Email: Mayor@TukwilaWA.gov • Website: TukwilaWA.gov
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City of Tukwila
6200 Southcenter Boulevard, Tukwila WA 98188
Agreement Number: 24-070
CONTRACT FOR SERVICES
Amendment #2
Between the City of Tukwila and PSOMAS
That portion of Contract No. 24-070 between the City of Tukwila and PSOMAS is hereby amended
as follows:
Section 2, Scope of Services
The following language shall be added to the end of the existing Section 2:
In addition, work under this contract shall include reimbursement for services, direct expenses,
and costs associated with the additional contract scope of services as described in Exhibit A
attached.
Section 4, Payment
Section 4A is hereby amended to read as follows:
Payment for the work provided by the Consultant shall be made as provided on Exhibit B
provided that the total amount of payment to the Consultant for that work shall not exceed
$281,246.00 without express written modification of the Agreement signed by the City.
The maximum amount payable under this contract as amended inclusive of all fees and other
costs shall not exceed $281,246.00 without express written modifications of the Agreement
signed by the City.
All other provisions of the contract shall remain in full force and effect.
Dated this
day of , 20
CA Reviewed May 2020
Page 1 of 2
41
City of Tukwila
6200 Southcenter Boulevard, Tukwila WA 98188
Agreement Number: 24-070
** City signatures to be obtained by ** Contractor signature to be obtained by
City Clerk's Staff ONLY. ** sponsor staff. **
CITY OF TUKWILA CONTRACTOR:
Thomas McLeod, Mayor
ATTEST/AUTHENTICATED:
Andy Youn, City Clerk
APPROVED AS TO FORM:
Office of the City Attorney
By:
Printed Name:
Title:
42 CA Reviewed May 2020
Page 2 of 2
PS O M A S Balancing the Natural and Built Environment
Exhibit A — Scope of Services
Supplement 2 — Tactics Database Updates
1. Task#1: Project management
Project management, meetings and administrative tasks. 52hrs
2. Task #2: Tactics Database Assessment, Review and Updates:
The pedestrian clearance timing task has revealed the need for a thorough
review of the current Tactics database. Since the Tactics system was
inoperable for several years, the information stored in the central database
is not consistent with the current on -street configurations. 4 hours of
additional time is needed to examine each of the 34 current intersections in
Tactics Central for accuracy, compare database configurations to
intersection configurations, and update configurations for each intersection
to ensure central database accuracy. (34x4 hrs.=128).
The pedestrian clearance timing study has created the need to modify the
signal coordination plans of 24 intersections to accommodate the additional
walk/don't walk time required for pedestrians. 3 hours per intersection is
needed to ensure that the coordination plans of each intersection will
function properly with the increased pedestrian clearance times. (24x3
hrs.=72).
City Signal staff have replaced 10 Traconex controllers with new M-60
models. Conversions of controllers can be complex, requiring site analysis
and extensive programming. These conversions warrant a configuration peer
review to ensure undocumented configurations are maintained in the new
controller conversions. (10x5 hrs.=50).
Follow-up TMC assistance to establish remote access for tech support,
Lucity integration, support and field testing. The Lucity integration requires
additional coordination meetings and field testing. 60 hrs.
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EXHIBIT B
PRIME CONSULTANT COST COMPUTATIONS
Client:
Project Name:
Psomas Inc. Project Number:
Date:
City of Tukwila
City Wide Signal Assessment
9TUK010900 - Supplement 2
6/30/2025
Task
No.
Task Description
Labor Hour Estimate
Hours and Labor
by Task
Principal
Engineering
Manager
Senior Engineer I1
Design Engineer I
Engineering
Technician
Office Admin
Total
Cost Computlons
$292.00
$228.00
$207.00
$134.00
$115.00
$111.00
Hours
Totals
Task 1 Project Management
1.1
Project Management and administrative services
8
12
10
2
32
$ 7,364.00
1.2
Meetings as needed
12
8
20
$ 3,656.00
Task Total
8
24
10
0
8
2
52
$ 11,020.00
Task 2 Tactics Database Assessment, Review, and Updates
2.1 (Tactics Database Assessment, Review, and Updates
8
80
8
106
108
310
$ 48,856.00
Task Total
8
80
8
106
108
0
310
$ 48,856.00
Total Labor Hours and Fee
16
104
18
106
116
2
362
$ 59,876.00
Total Estimated Budget
$ 59,876.00
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