The bill requires the state Department of Transportation to establish a traffic signal synchronization pilot for the local agencies that make up the Western Riverside Council of Governments (WRCOG). The pilot will test a regional model for coordinating signal timing between state highways and local arterials and produce an evaluation the Legislature can use to judge whether to scale the model.
This matters to local transportation agencies, Caltrans, regional planners and compliance officers because the pilot creates a formal role for the state in approving technical standards and evaluation methods while leaving implementation and most costs to participating local agencies. The pilot’s outcomes could shape how California coordinates signals statewide and influence investments in detection, communications, and adaptive signal technologies.
At a Glance
What It Does
The Department of Transportation must establish and administer a voluntary pilot with WRCOG to coordinate signal timing across state and local roads, retaining oversight authority including approval of work plans, data standards, and evaluation methodologies. Participating agencies may carry out studies and implement coordinated timing and technology upgrades under the pilot.
Who It Affects
Primary participants are WRCOG and its member local agencies, the regional transportation planning agency, and the state department that oversees highways; motorists, transit agencies, freight operators, and air quality planners will see downstream effects. Technology vendors and consultants offering signal hardware, software, detection, or communications systems are also directly implicated.
Why It Matters
If the pilot demonstrates measurable reductions in congestion, improved travel‑time reliability or lower vehicle emissions, the department can expand the model elsewhere — shifting how California prioritizes coordinated signal investments and sets statewide data and evaluation standards.
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What This Bill Actually Does
The bill directs the state Department of Transportation to stand up a time‑limited pilot that tests whether coordinating traffic signal timing across state highways and adjacent local arterials can deliver measurable benefits. The pilot is explicitly voluntary for local agencies and is centered on the membership of the Western Riverside Council of Governments; the department remains the program authority and must approve technical components such as work plans and data standards.
Participating local agencies will lead and pay for most on‑the‑ground activities through coordination with the regional transportation planning agency. Those activities can range from corridor studies and operational analyses to deploying adaptive timing plans and upgrading hardware, software, detection, and communications infrastructure.
The bill lists typical eligible activities to make clear the pilot covers both planning and practical field deployments.The department must evaluate the pilot’s effectiveness using performance measures that include congestion, travel time reliability, operational efficiency, safety, and vehicle emissions. Results and recommendations go to the Legislature in a formal report due January 1, 2028, prepared in accordance with the Government Code reporting rules.
If the evaluation shows measurable transportation and operational benefits, the department has authority to expand the model voluntarily to other jurisdictions, prioritizing corridors with heavy traffic, severe congestion, or significant multimodal activity.The pilot is temporary: the statute is written to sunset and repeal on January 1, 2032. That end date leaves a fixed window for testing, evaluation, and any subsequent voluntary expansion decisions while signaling that any longer‑term statewide adoption would require further statutory action or funding commitments.
The Five Things You Need to Know
The pilot is limited to the local agencies that constitute the Western Riverside Council of Governments and runs under voluntary participation by those agencies.
The department retains approval authority over work plans, data standards, and evaluation methodologies — giving the state control of technical and performance frameworks for the pilot.
Participating local agencies must fund their own studies, timing implementations, and technology upgrades; the bill does not appropriate state funds for local implementation.
The department must submit a formal report to the Legislature by January 1, 2028, summarizing outcomes, best practices, implementation challenges, and recommending whether the model is feasible statewide.
The statute automatically repeals on January 1, 2032; the department may expand the pilot before then only if its evaluation demonstrates measurable transportation and operational benefits.
Section-by-Section Breakdown
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Establishes the pilot for WRCOG
This subsection creates the pilot and pins its geographic and institutional scope to the Western Riverside Council of Governments. That choice confines the experiment to an identified regional governance structure and member agencies, which simplifies governance but limits early findings to a single regional context with its own travel patterns and infrastructure baseline.
Voluntary coordination, with state oversight
The pilot operates on a voluntary basis between WRCOG, its local agencies, and the department. Crucially, the department keeps oversight authority and must approve work plans, data standards, and evaluation methods. Practically, that means local agencies will need to align technical proposals with state expectations before deploying major changes — a control point that can ensure comparability across projects but may lengthen approval timelines.
Local implementation and cost responsibility
This subsection places implementation responsibility and associated costs squarely on participating local agencies, coordinated through the regional transportation planning agency. The legal phrasing makes those expenditures discretionary and locally funded rather than state‑funded, which affects which agencies can realistically participate and how quickly they can act.
Enumerates eligible activities
The bill lists eligible activities: signal synchronization studies, corridor operational analyses, coordinated and adaptive timing plans, hardware/software upgrades, detection and communications deployment, and data collection/performance monitoring. The enumeration is broad enough to allow both pilot research and operational deployments, signaling that the pilot is intended to test real‑world operational changes rather than only modeling exercises.
Evaluation, reporting, expansion criteria, and sunset
The department must evaluate measurable impacts on congestion, travel time reliability, operational efficiency, and vehicle emissions, then report to the Legislature by January 1, 2028, under Government Code reporting rules. If the department finds measurable benefits, it may expand the model voluntarily to other local agencies and prioritize corridors with high volumes or multimodal activity. The program statute automatically expires on January 1, 2032, creating a hard deadline for testing and any voluntary expansion while avoiding an open‑ended program commitment.
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Explore Transportation in Codify Search →Who Benefits and Who Bears the Cost
Every bill creates winners and losers. Here's who stands to gain and who bears the cost.
Who Benefits
- Local agencies within WRCOG that participate — they gain access to a coordinated testing framework, state‑approved data and evaluation standards, and operational templates that can reduce delay and improve corridor performance if the pilot shows positive results.
- Regional planners and MPOs — the pilot offers transferable methods and standardized performance metrics that can improve regional planning, grant applications, and evidence‑based prioritization of signal investments.
- Air quality and emissions planners — the bill explicitly includes vehicle emissions among evaluation metrics, producing jurisdiction‑level data to inform air quality planning and funding requests for emissions‑reducing infrastructure.
Who Bears the Cost
- Participating local agencies — the bill requires them to fund studies, timing plans, and technology upgrades themselves, which shifts capital and operating costs onto municipal budgets and may limit participation to better‑resourced jurisdictions.
- The Department of Transportation — while the state does not fund local implementation, the department must provide oversight, approve technical elements, and conduct evaluation work, tasks that will consume staff time and technical resources that are not explicitly funded by the bill.
- Regional transportation planning agency and WRCOG staff — coordinating volunteers, aligning technical standards, and supporting local agencies will require staffing and project management time, creating opportunity costs for other regional priorities.
Key Issues
The Core Tension
The central dilemma is between standardization and local flexibility: the state’s oversight and standardized evaluation are necessary to produce comparable, policy‑relevant findings, but those same controls and the requirement that local agencies self‑fund implementation discourage broad participation and can bias results toward better‑resourced corridors — leaving the state with a choice between a clean but unrepresentative evidence base or a messier, more inclusive experiment that is harder to evaluate.
The bill balances state technical control with local voluntary participation, but that combination creates practical tensions. Making local agencies pay for implementation increases the risk that only better‑resourced jurisdictions enroll, biasing results toward contexts that are not representative of rural or cash‑constrained cities.
That selection effect would weaken any claim that pilot results scale easily to less resourced regions.
The department’s authority to approve data standards and evaluation methodologies produces consistency across projects but risks constraining local innovation or slowing deployments if the approval process is administratively heavy. The statutory evaluation requirements (congestion, reliability, efficiency, safety, emissions) are appropriate, but attributing performance changes to signal coordination alone will be difficult where parallel investments (road work, transit changes, land‑use shifts) occur.
The lack of a dedicated funding stream for either local implementation or the department’s evaluation work could leave the pilot underpowered or unevenly implemented.
Finally, the pilot’s sunset creates a compressed timeline for demonstration and scaling. Some hardware and communications upgrades require multi‑year procurement, integration, and tuning; a fixed repeal date may deter investments that pay off beyond the statutory window unless additional funds or statutory extensions follow.
The pilot also raises tradeoffs between prioritizing vehicle throughput and protecting transit, bicycle, and pedestrian priorities; how jurisdictions weigh those goals will materially affect the pilot’s measured outcomes and policy recommendations.
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