HomeMy WebLinkAboutItem 8.1 Traffic Signal Operations and Maintenance UpdateStaff Report
City of Dublin
File #:2026-135 Agenda Date:11/3/2026 Agenda #:8.1.
Traffic Signal Operations and Maintenance Update
TO: Honorable Mayor and City Councilmembers
FROM:Colleen Tribby, City Manager
Prepared By:Sai Midididdi, Transportation and Operations Manager
EXECUTIVE SUMMARY:
The City Council will receive an informational report on the operation, coordination, monitoring, and
maintenance of the City’s traffic signal system. The report also describes Staff’s procedures for
investigating and responding to community concerns regarding traffic signal operations. The City
Council requested this report under Item 9 at the August 18, 2026 City Council meeting.
STAFF RECOMMENDATION:
Receive the report.
FINANCIAL IMPACT:
There is no financial impact associated with receiving this report.
DESCRIPTION:
On August 18, 2026, the City Council requested an informational report on the City’s traffic signal
system. The City’s traffic signal system continuously balances the needs of all roadway users, including
motorists, transit, pedestrians, and bicyclists. The City has established procedures to maintain the
system, address community concerns, and improve system performance and reliability. This report
provides an overview of how the City’s traffic signals are operated, coordinated, monitored, and
maintained.
Dublin’s Traffic Signal System: Overview
The following is a summary of key aspects of the traffic signal system:
•There are 96 signalized intersections in the City, with three additional signalized intersections
planned as part of development projects.
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•Seventy-five signalized intersections are connected to the Traffic Operations Center (TOC) at
City Hall, allowing Staff to monitor and adjust them remotely. The remaining 21 signalized
intersections will be connected to the TOC as opportunities arise by upgrading or adding fiber
through capital improvement and development projects.
•Seven additional traffic signals at I-680 and I-580 ramps are operated and maintained by the
California Department of Transportation (Caltrans) or the City of Pleasanton. While the City
does not directly program these signals, Staff works with these agencies to address issues and
pursue funding to improve operations and safety at these locations.
•Signals along major corridors including Dublin Boulevard, Dougherty Road, Tassajara Road, and
San Ramon Road are coordinated to improve traffic flow.
•Backup power exists at 81 signalized intersections. Backup power will be added at the
remaining 15 signalized intersections through an upcoming project.
•There are nine Rectangular Rapid Flashing Beacons at pedestrian crosswalks and nine speed
radar signs throughout the City.
•Routine field maintenance is provided by the Alameda County Public Works Agency under an
agreement with the City.
Traffic Signal Components
Each signalized intersection is a small system made up of several components:
•Controller and cabinet. The controller is the computer that runs the intersection. The
controller, housed in a roadside cabinet, decides which movements get a green light, in what
order, and for how long, based on timing programmed by Staff.
•Detection. Sensors tell the controller that a vehicle, bicycle, or pedestrian is waiting. Dublin
uses three types: inductive loops cut into the pavement, video cameras, and hybrid radar-video
units.
•Pedestrian push buttons. When pressed, the button alerts the signal that a pedestrian is
waiting to cross and turns on the “walk” signal.
•Emergency vehicle preemption. Certain equipment is present with the controller that lets
responding fire apparatus turn the light green in their direction.
•Backup power. Batteries or fuel cells keep signals running during a power outage at the
majority of the signalized intersections.
•Communications. Fiber-optic or copper cable connects each signal to the TOC through
underground conduit.
Traffic Signal Operations
All traffic signals in the city are “actuated,” meaning they respond to real-time detection. If no vehicle,
bicycle, or pedestrian is detected, that movement is typically skipped and the green time is
reallocated to other movements or remains with the major direction.
Traffic Operations Center and Advanced Traffic Management System
An Advanced Traffic Management System (ATMS), the central software that communicates with each
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connected signal, is operated from the TOC. The ATMS allows Staff to monitor signal operations in real
time and adjust timing remotely. It also sends automatic alerts to Staff about power failures,
communication loss, and equipment malfunctions at connected intersections, and keeps a detailed
history of each signal’s operation. Signals not yet connected to the TOC are checked or adjusted by a
technician in the field.
Traffic Signal Coordination
Signal coordination, also referred to as synchronization, times a series of signals so that vehicles
traveling at the posted speed can proceed through consecutive green lights with fewer stops. The City
uses two methods of coordination: time-of-day and adaptive. Signals that are too widely spaced do
not benefit from coordination and operate independently as described below.
Time-of-Day Coordination
Time-of-day coordination uses pre-set timing plans for specific periods, developed from traffic count
data. This method is effective where traffic patterns are predictable, but plans must be updated every
three to five years. Separate plans are typically used for the morning, midday, and evening peak
periods.
Time-of-day plans are in place on Dublin Boulevard between Hacienda Drive and Tassajara Road,
Tassajara Road from Dublin Corporate Way to Silvera Ranch Drive, and San Ramon Road from Dublin
Boulevard to Vomac Road. On Tassajara Road, coordination is periodically affected by ongoing
adjacent construction. When construction affects signal detection or lane configurations, Staff may
temporarily operate these signals uncoordinated or in recall mode, as described below.
Traffic signal coordination prioritizes the main street, which can increase wait times on side streets. To
reduce these impacts, the morning coordination plans on Tassajara Road and San Ramon Road begin
after school drop-off hours. This allows parents leaving neighborhood streets to reach schools without
extended delays.
Adaptive Coordination
Adaptive coordination adjusts signal timing automatically in response to real-time traffic conditions,
within parameters set by Staff. The City uses SynchroGreen, an adaptive system that operates within
the ATMS. Unlike time-of-day plans, adaptive coordination can respond to unpredictable changes in
traffic, such as those caused by incidents or construction. It works best on busy corridors where traffic
varies significantly. For example, traffic on Dublin Boulevard can shift quickly when an incident occurs
on I-580. Corridors with more consistent traffic are well served by time-of-day plans. Although
adaptive coordination adjusts automatically, Staff also periodically reviews and fine-tunes the
parameters that guide it.
Adaptive coordination currently operates on Dublin Boulevard between San Ramon Road and
Hacienda Drive, and on Dougherty Road between Dublin Boulevard and Amador Valley Boulevard. On
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Dublin Boulevard, the system also provides transit signal priority, which gives Livermore Amador
Valley Transit Authority (LAVTA) buses extra green time when needed. Staff is currently working
toward adaptive coordination along the entire Dublin Boulevard corridor as further discussed below.
Uncoordinated Operation
Coordination is effective only when signals are close enough for vehicles to travel between them in
groups. Where intersections are widely spaced, such as on Fallon Road, signals operate independently
and respond to traffic detected at each intersection.
Factors Affecting Wait Times
Signal timing must balance the needs of all users, including main-street and side-street traffic, turning
vehicles, pedestrians, bicyclists, and transit. Green light time given to one movement is generally
taken away from another, making it challenging to minimize delay for every movement at an
intersection. Most signal cycles in the City range from 130 to 140 seconds.
Competing Demands at Major Intersections
•Major cross streets. At many of the City’s major intersections, the cross street carries traffic
volumes comparable to the main street, often because these cross streets provide access to
the freeway, regional destinations, or residential neighborhoods. In these locations, signal
timing must serve both directions rather than favor one. For example, Dublin Boulevard
intersects several primary north-south routes to I-580 including San Ramon Road, Dougherty
Road, Hacienda Drive, Tassajara Road, and Fallon Road. At these intersections, signal timing
must balance smooth traffic flow on Dublin Boulevard with heavy north-south demand to and
from I-580.
•Intersection size. Several major intersections include up to three left-turn, three through, and
three right-turn lanes in a single direction. Serving each movement safely and in sequence
increases the overall signal cycle length, which is the time it takes the signal to serve every
direction once.
•Pedestrian crossing time. State standards require pedestrian crossing time based on a walking
speed of 3.5 feet per second. On the City’s wider arterials, which can include six travel lanes,
turn pockets, and a median, a single crossing can require more than 40 seconds. When a
pedestrian activates the push button, the signal must provide the full required crossing time,
which can interrupt other movements and signal coordination along the corridor.
•Transit and active transportation. Intersections near transit stations and bus routes
experience significant pedestrian and bicycle activity, and signal timing must accommodate
these users along with vehicles. For example, the Dublin Boulevard corridor serves two Bay
Area Rapid Transit (BART) stations, West Dublin/Pleasanton and Dublin/Pleasanton, as well as
LAVTA Rapid bus service, and includes bicycle lanes along much of its length.
•Higher-density and mixed-use areas. In higher-density areas, signals must balance through
traffic on the main street with frequent side-street demand from nearby businesses, schools,
and residences. For example, at Dublin Boulevard and Regional Street in Downtown Dublin,
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east-west traffic competes with side-street demand from downtown commercial and
residential development as well as a school.
Staff continuously evaluates these competing needs. Because flexibility at these intersections is
limited, Staff balances signal timing to keep overall delay as low as possible across all movements and
calibrates as conditions change.
Other Factors Affecting Wait Times
In addition to coordination and pedestrian crossing time described above, the following conditions
can result in longer-than-expected waits:
•Recall mode. When detection is unavailable, a signal may be placed in “recall,” which serves a
movement every cycle whether a user is present or not. Recall maintains safe operation but is
less efficient. For example, during recent construction on Tassajara Road, Staff coordinated
with the developer in advance to convert inductive loops to video detection. However,
construction activities periodically disabled pedestrian push buttons. Recall was used at cross
streets such as Central Parkway and Gleason Drive to maintain pedestrian access to residential
neighborhoods and nearby schools. Staff reviews recall situations as they are reported,
prioritizes them based on location and the users affected, and restores normal operation as
soon as practical.
•Damaged detection. Roadway construction and paving projects can damage inductive loops
embedded in the pavement. Although Staff arranges inductive loop repair in advance, signals
may operate less efficiently until repairs are completed.
•Detection technology limitations. Based on conditions at each intersection, the City uses a
combination of inductive loops, video cameras, and hybrid radar-video detection. Video
detection is not affected by pavement work, can be reconfigured remotely when lanes change
during construction, and allows Staff to view intersection conditions from the TOC. However,
cameras can be affected by low sun angles at sunrise and sunset, and by dense winter tule fog.
At locations where glare and fog have been an issue, Staff installs hybrid radar-video units or
loops. Staff continues to evaluate detection performance and select the most reliable
technology for each intersection.
•Emergency vehicle preemption. When a fire apparatus preempts a signal, normal operation is
interrupted to provide a green indication. The signal may take several cycles to return to
coordination, which can appear to drivers as a malfunction.
Monitoring and Verifying Signal Operations
The City uses several tools to identify problems proactively, often before complaints are received:
•ATMS reports and alarms. The ATMS generates operational reports and alerts Staff to power
failures, communication loss, and equipment malfunctions at connected intersections. These
reports are the primary tool for monitoring signal performance.
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•Signal Performance Measures (SPMs). SPMs are used in the adaptive corridors to provide
more detailed performance data, such as how many vehicles arrive on a green indication and
whether a detector has malfunctioned. The SPMs and ATMS reports are reviewed weekly to
proactively identify issues.
•Camera monitoring. Staff periodically views intersections remotely through detection and
traffic monitoring cameras.
•Routine field inspections. County technicians inspect every signal quarterly.
•Community reports. Resident reports remain an important source of information, particularly
at signals not yet connected to the TOC.
Power Outages and Backup Power
When the power goes out at an intersection with backup power, the backup system activates
automatically, and drivers usually do not notice the switch.
Backup power coverage at the City’s 96 signalized intersections is as follows:
•Fuel cells.Eleven of the largest and most critical intersections are equipped with hydrogen fuel
cells, which can operate a signal for up to three days.
•Battery backup units. Seventy intersections use battery backup units, which operate a signal
for approximately three to four hours when batteries are in good condition. As batteries run
low, the signal switches to flashing red. Once fully depleted, the signal goes dark.
•Remaining intersections. Battery backup units will be installed at the 15 intersections currently
without backup power as part of the upcoming Citywide Signal Communications Upgrade
Project, Capital Improvement Project (CIP) No. ST0713 (Attachment 1).
If a signal goes dark, the California Vehicle Code (CVC) requires drivers to treat the intersection as an
all-way stop (CVC Section 21800(d)). Although not required by State law, the City installs temporary
stop signs when Dublin Police Services determines they are needed and removes them as soon as
power is restored.
Traffic Signal Maintenance
Since incorporating in 1982, the City has contracted with the Alameda County Public Works Agency
for traffic signal maintenance. The current agreement with the County runs through June 30, 2027.
City Staff and on-call contractors handle the rest of the maintenance. Responsibilities are divided as
follows:
•County. Maintains signal equipment in the field, including:
o Performing quarterly preventive maintenance at every signalized intersection, including
inspection of signals, controllers, detectors, signal heads, pedestrian push buttons, and
cabinets
o Testing and replacing battery backup units on a quarterly basis
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o Cleaning signal lenses, detection, and preemption equipment annually
o Providing 24-hour emergency response to repair damage from equipment failures,
malfunctions, collisions, and vandalism
•City Staff. Operates the TOC and ATMS, including:
o Performing signal timing and programming
o Monitoring performance
o Responding to community concerns
o Planning system improvements
o Managing traffic signal maintenance contracts
•On-call contractors. Support the County when:
o Additional capacity or specialized work is needed, such as detection replacement
o Maintaining the hydrogen fuel cell backup systems, which require specialized expertise
Reporting Community Concerns
The easiest way for residents to report traffic signal concerns is through Fix It Dublin, online or in the
app, or by calling the Public Works Department at 925-833-6630. To help Staff investigate efficiently,
reports should include:
•The intersection and direction of travel;
•The date and approximate time of the issue; and
•A description of the issue, such as an extended wait, a signal not changing, a non-functioning
pedestrian push button, or a single signal light (green, yellow, or red) that is out while the rest
of the intersection is working.
Signals that are dark or knocked down should be reported to the Dublin Police Services non-
emergency line at 925-462-1212, or to 911 if there is an immediate safety hazard.
Each request is addressed based on the nature of the issue, as summarized in Table 1. Non-emergency
requests are prioritized based on safety and the number of users affected.
Table 1. Concerns and Responses
Type of Concern Responsible Party Typical Response
Emergency (dark or flashing
signal, knockdown,
equipment damage)
Alameda County or City
on-call contractor
Referred immediately; repaired
same day
Signal light outage (green,
yellow, or red LED)
Alameda County Referred immediately; repaired
within 24 to 48 hours
Detection failure Alameda County or City
on-call contractor
Referred immediately; recall
used in the interim if needed
Signal changing when no
one is waiting (recall mode)
City Staff, with Alameda
County or City on-call
contractor
Prioritized by location and users
affected; typically two to five
days
Signal timing or extended
wait
City Staff and on-call
traffic engineering
consultant
Requires field observation and
data review; varies by complexity
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Type of Concern Responsible Party Typical ResponseEmergency (dark or flashingsignal, knockdown,equipment damage)Alameda County or Cityon-call contractor Referred immediately; repairedsame daySignal light outage (green,
yellow, or red LED)
Alameda County Referred immediately; repaired
within 24 to 48 hours
Detection failure Alameda County or City
on-call contractor
Referred immediately; recall
used in the interim if needed
Signal changing when no
one is waiting (recall mode)
City Staff, with Alameda
County or City on-call
contractor
Prioritized by location and users
affected; typically two to five
days
Signal timing or extended
wait
City Staff and on-call
traffic engineering
consultant
Requires field observation and
data review; varies by complexity
Staff investigates reported intersection delays remotely or in the field at the reported time of day.
Staff also reviews the signal’s recorded operating history and ATMS reports to verify actual wait times.
For signals on adaptive corridors, Staff additionally reviews SPM data. If needed, Staff adjusts the
signal timing or arranges equipment repairs. If a signal is operating as intended, Staff continues to
monitor the signal periodically to determine whether further action is needed.
Signal Timing Updates and System Improvements
In recent years, new development, new schools, increased walking and bicycling activity, construction,
and post-pandemic changes in travel patterns have all affected traffic in the City. The City’s current
and upcoming efforts to improve signal timing and make system improvements include:
•Dublin Boulevard, San Ramon Road to Hacienda Drive.Updated timing and fine-tuning of the
adaptive system were completed in September 2026 to reflect current traffic patterns.
•Dublin Boulevard, Hacienda Drive to Fallon Road. Staff is developing updated time-of-day
coordination plans including data collection, analysis, plan development, and field fine-tuning.
Implementation is anticipated by the end of 2026. These plans will serve the corridor until
adaptive coordination is extended.
•Detection improvements. Staff is continuing to evaluate detection performance and upgrade
equipment where needed.
•Citywide Signal Communications Upgrade. The Citywide Signal Communications Upgrade
Project (Attachment 1) replaces copper and older fiber on Dublin Boulevard between San
Ramon Road and Tassajara Road to provide the capacity needed for cameras, adaptive
operation, and performance monitoring, and adds battery backup units at the 15 intersections
currently without backup power. The Alameda County Transportation Commission awarded
this project a $1,854,000 grant. Staff anticipates advertising the project for bids in spring 2027.
The Tassajara Road Gap Closure Project, CIP No. ST0119, and the Dublin Centre development
will install fiber on Tassajara Road. The Village Parkway Reconstruction Project, CIP No. ST0323,
will install fiber on Village Parkway. San Ramon Road and Dougherty Road already have fiber
installed through previous CIP projects.
•I-580 Interchange Pedestrian and Bicycle Improvements. The City of Pleasanton applied for an
Alameda County Transportation Commission grant, with a letter of commitment and support
from the City. Staff is working with Pleasanton on the project concepts, but they generally
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include improving pedestrian and bicycle safety at the I-580 interchanges at Dougherty Road,
Hacienda Drive, and Tassajara Road, adding Rectangular Rapid Flashing Beacons at freeway
ramp crossings, improving signs and pavement markings, and adding bicycle lanes where there
is sufficient room. These improvements would remove a major barrier identified in the City’s
Bicycle and Pedestrian Plan.
STRATEGIC PLAN INITIATIVE:
Priority 5: City Infrastructure
Objective B: Invest in proactive and preventative maintenance to preserve City infrastructure and
extend asset life cycles.
NOTICING REQUIREMENTS/PUBLIC OUTREACH:
The City Council Agenda was posted.
ATTACHMENTS:
1)CIP No. ST0713: Citywide Signal Communications Upgrade Project
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Citywide Signal Communications Upgrade
Overview
Request Owner Michael Boitnott, Capital
Improvement Program Manager
Department Public Works
Type Capital Improvement
Project Type Streets
Project Number ST0713
Project Location
Description
This project provides for continued upgrades of the traffic signal communications system and replacement of signal
controllers, conflict monitors, and battery backup units, as well as managing ongoing signal operations of coordinated
corridors. The project provides for the installation of new conduits, removal of the existing copper communication cables,
and installation of new fiber optic cables on Dublin Boulevard. The project also expands the adaptive traffic signal system
along key corridors to connect existing and new public safety infrastructure, such as situational awareness cameras and
automated license plate recognition cameras, to the high-speed fiber optic communications system.
The City received $1,854,000 in VRF funds through the Alameda County Transportation Commission’s Comprehensive
Investment Plan program to install fiber optic cable along Dublin Boulevard from San Ramon Road to Tassajara Road. The
project will replace old copper communication lines with faster and more reliable fiber optic cable, improve traffic signal
coordination, upgrade detection systems, add battery backup units, and improve safety, reliability, and transit operations
along the corridor.
Details
Type of Project:Improvements
Capital Cost
FY2027 Budget
$0
Total Budget (all years)
$0
Project Total (to date)
$6.94M
Detailed Breakdown
Category Historical
Budgeted
FY2027
Requested
FY2028
Requested
FY2029
Requested
FY2030
Requested
FY2031
Requested
Future
Budgeted Total
9100 - Salaries & Benefits $187,482 $0 $0 $0 $0 $0 $0 $187,482
9200 - Contract Services $1,445,200 $0 $0 $0 $0 $0 $0 $1,445,200
9400 - Improvements $5,291,725 $0 $0 $0 $0 $0 $0 $5,291,725
9500 - Miscellaneous $9,900 $0 $0 $0 $0 $0 $0 $9,900
9600 - Equipment $5,120 $0 $0 $0 $0 $0 $0 $5,120
Total $6,939,427 $0 $0 $0 $0 $0 $0 $6,939,427
Citywide Signal Communications Upgrade
2026-2031 Five-Year Capital Improvement Program | Dublin Page 96
Attachment 1
345
Funding Sources
FY2027 Budget
$0
Total Budget (all years)
$0
Project Total (to date)
$6.94M
Project Timeline
●06/30/2020
The Travel Demand Model was updated to provide traffic flow projections on arterial and collector
roadways, and future land use and transportation network changes were analyzed.
●04/30/2021
The City Council adopted a Resolution establishing CEQA transportation thresholds of significance for
Vehicle Miles Traveled.
●06/30/2021
The City's traffic communications network was expanded, and traffic signals on Dublin Boulevard, San
Ramon Road, Fallon Road, and Tassajara Road were connected.
●07/1/2025
The installation of a conduit pathway between the Civic Center and San Ramon Road to accommodate
the future fiber optic upgrades to city infrastructure was completed. The design for fiber optic cables
on Dublin Boulevard between San Ramon Road and Tassajara Road had begun.
●07/1/2026
The project design is anticipated to complete in 2026 and construction is anticipated to begin in 2027.
Detailed Breakdown
Category Historical
Budgeted
FY2027
Requested
FY2028
Requested
FY2029
Requested
FY2030
Requested
FY2031
Requested
Future
Budgeted Total
1001 - General Fund $79,851 $0 $0 $0 $0 $0 $0 $79,851
1101 - General Fund Designated Reserve $1,420,149 $0 $0 $0 $0 $0 $0 $1,420,149
2201 - State Gas Tax $104,000 $0 $0 $0 $0 $0 $0 $104,000
2204 - Measure B Sales Tax - Local Streets Fund
(Alameda CTC)
$248,640 $0 $0 $0 $0 $0 $0 $248,640
2207 - Transportation for Clean Air $79,771 $0 $0 $0 $0 $0 $0 $79,771
2212 - Vehicle Registration Fee (Alameda CTC)$787,396 $0 $0 $0 $0 $0 $0 $787,396
2214 - Measure BB Sales Tax - Local Streets Fund
(Alameda CTC)
$1,150,000 $0 $0 $0 $0 $0 $0 $1,150,000
2220 - Road Maint. & Rehab Account (RMRA)$694,320 $0 $0 $0 $0 $0 $0 $694,320
2924 - VRF (ACTC) Grants $1,854,000 $0 $0 $0 $0 $0 $0 $1,854,000
4300 - Eastern Dublin Transportation Impact Fee $200,000 $0 $0 $0 $0 $0 $0 $200,000
4304 - Western Dublin Transportation Impact Fee $199,000 $0 $0 $0 $0 $0 $0 $199,000
6305 - Internal Service Fund - Equipment
Replacement
$122,300 $0 $0 $0 $0 $0 $0 $122,300
Total $6,939,427 $0 $0 $0 $0 $0 $0 $6,939,427
Citywide Signal Communications Upgrade
2026-2031 Five-Year Capital Improvement Program | Dublin Page 97 346
Traffic Signal Operations and
Maintenance Update
City Council Meeting
347
Dublin’s Traffic Signal System
96
Signalized
intersections
Plus 3 planned with
development Monitored remotely
Operated by
Caltrans or
Pleasanton
At pedestrian
crosswalks
Located citywide
348
Dublin’s Signalized Intersections
349
Key Traffic Signal Components
•Controller and cabinet
•Detection
•Pedestrian push buttons
•Backup power
•Communications
•Emergency vehicle preemption
350
Traffic Signal Operations
•Traffic Operations Center (TOC) at City
Hall
•Advanced Traffic Management System
(ATMS) software
•Real-time monitoring and remote
timing adjustments
•All signals are actuated: they respond
to detected users and skip movements
when no one is waiting
351
How Signals Are Coordinated
Time-of-Day
Pre-set timing plans for different times of day, based
on traffic counts
Dublin Blvd (Hacienda Dr to Tassajara Rd), Tassajara Rd,
and San Ramon Rd
Adjusts automatically to real-time traffic; best where
traffic changes unpredictably
Dublin Blvd (San Ramon Rd to Hacienda Dr) and
Dougherty Rd (Dublin Blvd to Amador Valley Blvd)
Where intersections are widely spaced, such as on Fallon Rd, signals operate independently.
352
Factors Affecting Wait Times
•Major cross streets
•Intersection size
•Pedestrian crossings
•Transit and active transportation
•High-density areas
•Detection damage or limitations
•Recall mode
•Emergency vehicle preemption
353
Monitoring Signal Operations
•ATMS reports and
alarms
•Weekly performance
data review
•Camera monitoring
•Quarterly field
inspections
•Community reports
354
How Staff Responds
Type of Concern Responsible Party Typical Response
Emergency (dark or flashing
signal, knockdown, equipment
damage)
Alameda County or City on-call
contractor
Referred immediately; repaired
same day
Alameda County Referred immediately; repaired
within 24 to 48 hours
Alameda County or City on-call
contractor
Referred immediately; recall used
in the interim if needed
City Staff, with County or
contractor support
Prioritized by location and users
affected; typically 2 to 5 days
City Staff and traffic engineering
consultants
Requires field observation and
data review; varies by complexity
355
Who Maintains the Signals
Alameda County Quarterly inspections of every signal, annual cleaning, battery testing, and
24-hour emergency response
Specialized work, including detection and fuel cell maintenance
Signal timing, monitoring, community concerns, improvements, and
contract management
Note: Staff will solicit proposals and return to the City Council with a recommendation before the Alameda
County Traffic Signal Maintenance Agreement expires on June 30, 2027.
356
Backup Power
11 Fuel cells at critical intersections
Up to 3 days of power
About 3 to 4 hours of power
Through CIP No. ST0713
357
Dublin’s Signalized Intersections
With Backup Power
358
Signal Improvements
Completed Sept 2026 Adaptive timing fine-tuned: Dublin Blvd, San Ramon Rd to Hacienda Dr
Time-of-day timing update: Dublin Blvd, Hacienda Dr to Fallon Rd
Detection upgrades, including radar where glare or fog affects cameras
Dublin Blvd fiber and citywide battery backup upgrade (CIP No. ST0713; $1.854M
grant)
I-580 interchange pedestrian and bicycle safety (Pleasanton-led)
359
How to Report a Concern
Fix It Dublin
App, City website, or Public Works
925-833-6630
•Long wait or signal not changing
•Pedestrian push button not working
•A single signal light out
Include location, direction of travel, and time of
day
•Signal is dark
•Signal pole knocked down
Call 911 only if there is an immediate safety hazard
360
Questions
?
361