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Highway 4 Construction Updates

This information is provided so that families and community members are aware of possible traffic delays or detours while using Highway 4 and nearby roads.


Go to for more information. 

The California Department of Transportation (Caltrans), in cooperation with the Federal Highway Administration (FHWA) and the Contra Costa Transportation Authority (CCTA) , is widening State Route 4 (SR 4), its interchanges, and affected local roadways from approximately 0.8 mile west of Loveridge Road to approximately 0.7 mile east of Hillcrest Avenue.


For the most current information on lane and ramp closures please visit the Caltrans lane closure website.


If you have any questions or comments about the highway 4 projects, please e-mail to: .