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California Takes Action to Protect Transportation Infrastructure Ahead of Future Extreme Weather

What you need to know: California is taking steps to protect highways and communities from extreme weather by using updated guidance and tools aimed at furthering adaptation efforts of the state’s ...
California Department of Transportation

Additional 36-Hour Full Highway Closure Of Route 4 From Roberts Road To San Joaquin/Contra Costa County Line

Caltrans will perform an additional 36-hour full highway closure of State Route 4 (SR-4) from Roberts Road to the San Joaquin ...
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Nightly Full closures continue tonight between the hours of 7:00 PM to 8:00 AM

Drivers should note that Lane and ramp closure will continue to take place on SR-4 every Monday through Friday night between the hours of 7:00 p.m. to 8:00 a.m. To search for current District 4 lane ...
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State Routes 9, 35, and 84 (Four Corners) Safety Improvements in San Mateo County

Caltrans is committed to improving safety along State Routes 9, 35 and 84 in San Mateo County. As part of ongoing efforts toward a goal of zero traffic fatalities and serious injuries on all ...
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Caldecott Tunnel Eastbound State Route 24 (Sr-24) Overnight Closure of Bore #2

Thursday, October 1, 2026, 10 p.m. to 4:30 a.m. Alameda And Contra Costa Counties – Caltrans is slated to close the Caldecott Tunnel Bore 2 on eastbound SR-24 overnight in Alameda and Contra Costa ...
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WB I-80 Bayshore Freeway Weekend Closure Between 5th St. & 15th St.

Friday, October 23 at 11 p.m. to Monday, October 26, 6 a.m. San Francisco County ― Caltrans has planned a full weekend closure of the westbound I-80 Bayshore Freeway from 5th St. to 15th St. in San ...
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Update: Nightly One-Way Traffic Control on State Route-12 (SR-12) for Pavement Rehabilitation

Solano County - Caltrans Construction continue the pavement rehabilitation project on State Route – 12. Work will consist of repairs and polyester polymer concrete overlay for Union Creek Bridge to ...
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Help Keep State Waterways Clean! Join Thousands of Volunteers for Annual California Coastal Cleanup Day on Sept. 19

Sacramento — Mark your calendars for California’s largest annual volunteer cleanup effort on Saturday, Sept. 19. Communities statewide will come together for the 42 nd Annual California Coastal ...
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UPDATE: Full Weekend Closures on Northbound U.S. 101 & Lane Reduction on Southbound (Hospital Curve) September 18-21

All Northbound Lanes & 1 Southbound Lane Closed between Cesar Chavez St. to 17th St. San Francisco County — Caltrans will continue construction on the northbound U.S. 101 Bayshore Freeway (Hospital ...
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*Update #1* Full Overnight Closures of Highway 1 Near Aptos Set to Take Place September 20 & 21

SANTA CRUZ COUNTY — A project to construct a pedestrian overcrossing bridge at Mar Vista Drive near Aptos will result in full closures of Highway 1. A full closure of northbound Highway 1 in Aptos ...
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Nightly Lane, Partial Ramp Closure Scheduled for Harbor Bridge Structural Improvement Project on Northbound US-101 in San Rafael

Marin County — Caltrans is scheduled to begin work on a structural improvement project on Northbound US-101 at the Harbor Bridge in San Rafael. The project will require nightly lane closures and a ...
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UPDATE: Full Weekend Closures on Northbound U.S. 101 Bayshore Freeway (Hospital Curve) September 4 –7

Northbound Lanes REOPENED between Cesar Chavez St. to 17th St. San Francisco County — Caltrans has completed this Labor Day Weekend closure and all northbound U.S. 101 Bayshore Freeway (Hospital Curve ...