District 4 - Traffic Operations

The Division of Traffic Operations consists of 260 technical and administrative staff in seven offices responsible for planning, design, and analysis of highway safety and traffic operational improvements; traffic management activities and operations as well encroachment permits, on over 7600 lane-miles on over 770 centerlines of conventional highways and 690 miles of freeways and expressways, including over 400 miles of carpool lanes.

 

Office of Asset Management & Performance

Office of Asset Management 

This office helps manage the performance of traffic operations assets and strategies, develops and implements Transportation Systems Management and Operations (TSMO), manages the Transportation Management System (TMS) program as the SHOPP Program Code 315 Advisor, collects and reports traffic data, supports asset and data management, and operates ramp meters and park and ride lots. 

Performance Support Branch

 This Branch is responsible for the managing and reporting of operational performance for the District’s Traffic Operation assets and data. Among these assets are TMS devices, ADA Infrastructure, Weigh-in-Motion (WIM) Facilities, and Commercial Vehicle Enforcement Facilities (CVEF).  Included in these responsibilities are identifying program repair and restoration needs for both improving system performance and addressing end-of-life replacements, developing and managing TMS projects and/or service contracts to address the program needs, ensuring appropriate funding, and managing support resources through the project development and contract administration phases of these projects/service contracts.

TSMO & Asset Management Branch

This Branch is responsible for TMS asset program management and development; plan and develop TSMO and Integrated Corridor Management (ICM) and develop interagency and Operation & Maintenance (O&M) agreements. The branch supports the program advisor's role for the 315 SHOPP program, to influence and justify project initiation and project approval documents for the implementation of Traffic Management Systems (TMS) equipment, in addition to reviewing projects for opportunities to install new and update/minimize impacts to existing TMS elements. 

 

Traffic Data Support Branch

This Branch collects and maintains the District's traffic census and inventory data. This branch coordinates data requests and updates for the Traffic Accident Surveillance and Analysis System (TASAS) and maintains the district’s accident records. Provides support for the development of the Mobility Performance Report.

Ramp Metering SW Branch / Ramp Metering NE Branch

The Ramp Metering branches operates over 645 ramp meters in the Bay Area. The SW branch covers ramp meters in San Francisco, San Mateo, Santa Clara counties and also mainline meters. The NE branch covers ramp meters in Alameda, Contra Costa, Marin, Napa, Solano and Sonoma counties and is also involved in the development and operation of the district’s 50 Park and Ride Lots. Both branches are involved in developing and following the Ramp Metering Development Plan (RMDP) and assisting with freeway traffic analysis and studies. They also  influence the development of and enforce the Ramp Metering Design Manual (RMDM) and Ramp Metering Operations Manual (RMOM), and related guidance and policies. 

 

Office of Corridor Management

Office of Corridor Management (N/E)

The Office of Corridor Management North/East (N/E) is responsible for the Operations and Safety Program activities and the delivery of safety/operations/traffic engineering/TMP components of the capital outlay, maintenance, and local funded projects including PIDs and encroachment permits in Napa, Solano, Alameda, and Contra Costa counties. Collaborates with local agencies on traffic operations and safety issues. Partners with Div of Transportation Planning on Complete Streets and Modality.

Office of Corridor Management (S/W)

The Office of Corridor Management South/West (S/W) is responsible for the Operations and Safety Program activities and the delivery of safety/operations/traffic engineering/TMP components of the capital outlay, maintenance, and local funded projects including PIDs and encroachment permits in Marin, Sonoma San Francisco, San Mateo, and Santa Clara counties. Partners with Div of Transportation Planning on Complete Streets and Modality.

 

Office of Electrical Systems & TMS

The Office of Electrical Systems & TMS develops, implements, and operates transportation management systems (TMS) elements, associated communication systems, transportation technologies, and transportation management center (TMC) infrastructure.  The Office also operates traffic signals and assists with electrical inspection for encroachment permits.  TMS elements traffic monitoring stations, ramp metering systems, Closed Circuit Televisions (CCTVs), Changeable Message Signs (CMSs) Highway Advisory Radio (HARs), and Extinguishable Message Signs (EMSs) and warning systems. Moving forward, the Office will be implementing infrastructure for Connected and Autonomous Vehicles (CAV).

 

Office of Encroachment Permits

The Office of Encroachment Permits processes permit applications and issues permits to applicants for highway improvements to construct approved facilities or to conduct specified activities. The Office’s primary objectives are to protect, maintain and enhance the quality of the State Highway System during and after permitted work, ensure the safety of both the highway users and the permit applicant, ensure that the proposed encroachment is compatible with primary uses of the State Highway System, protect the State’s investment in the highway facility and document temporary uses of highway right-of-way for special events, filming, etc.

For inquiries related to encroachment permits, please contact us at D4Permits@dot.ca.gov or (510)286-4401.

 

Office of Project Development Support

The Office is responsible for the delivery and review of the electrical design and traffic signing components of the capital outlay, maintenance, and local funded projects including PIDs and encroachment permits. It also assists in COS resource management, project circulation, and delivery tracking for the Division.

 

Office of Traffic Management

The Office of Traffic Management, in partnership with regional agencies and the California Highway Patrol(CHP), manages the day to day traffic operations of the SHS, specifically incident management, traffic monitoring, traveler information, lane closure management, truck access and restrictions, and transportation management plan (TMP) implementation.  The Office operates the Bay Area’s 24/7 Transportation Management Center (TMC) located at District 4 HQ Building.  The Office Chief serves as the District Traffic Manager (DTM), the single focal point for day to day traffic management.