State Route 4 Corridor Map
Congestion Relief along the California Delta Highway
State Route 4 is an east-west route providing interregional connection between the Central Valley and Bay Area. SR-4 provides access to the interstate system (connecting to I-80, I-680) and regional routes such as SR 242. As the SR-4 bypass is completed this route will provide access to I-580 in the Tri Valley.
The State Route 4 corridor being addressed in the CSMP is over 31 miles long and begins in the city of Hercules at I-80, traversing unincorporated Contra Costa County, as well asd the cities of Martinez, Concord, Pittsburg and Antioch before ending at the SR-4/SR-160 interchange. The segment between I-80 and I-680 is classified as a principal arterial while the remaining segments are freeway.
Corridor Specific Issues
- Regional connection between I-80 and I-680; interregional connection to Delta region and Stockton.
- Commuter link between East Contra Costa County and other East Bay-San Francisco employment centers.
- High rates of delay due to commute, freight and recreational traffic.
- Adoption of the State Route 4 Bypass into the State Highway System in progress.
- BART serves much of the corridor east of SR-242; eBART is planned as a major extension.
- Jobs/Housing imbalance a factor in congestion growth .
- Bicycle/ Pedestrian access barriers to transit exist in many communities.
Corridor Mobility Improvement Account (CMIA) Projects
The CSMP requirement is noted in the Baseline Agreements of all projects receiving CMIA funding. CMIA funds have been allocated for the following improvement project on the SR-4 Corridor:
- Widen from Somersville Road to SR-160
Partners and Project Schedule
Caltrans is working in partnership with local agencies and groups to develop a Corridor System Management Plan (CSMP) for the SR-4 Corridor, which traverses Contra Costa County from I-80 in the City of Hercules to the SR-4/SR-160 Interchange in the City of Antioch. This SR-4 CSMP is expected to be completed by Fall 2010. Its recommendations will then be considered in the transportation planning processes that are conducted by the Metropolitan Transportation Commission (MTC), Caltrans and the Contra Costa Transportation Authority (CCTA); all the agencies that are responsible for funding and implementing regional and interregional-scale transportation projects.
- Complete Draft CSMP (July 2010)
- Adopt Final CSMP (Sept. 2010)
View a copy of the SR-4 Fact Sheet by clicking here
For More Information, please contact:
Erik Alm
Office of System Planning
District 4
