CA · Highway

CA-4 W Accidents & Crashes

CA-4 W has recorded 973 traffic crashes in California since 2024, with no fatalities on record. In the last 24 hours, 2 new crashes were reported. The highest crash volumes are concentrated near Contra Costa.

Data is sourced from the California Crash Records System (CCRS), maintained by the California Highway Patrol and updated daily, and the CA 511 live incident feed, refreshed every 15 minutes. Records include crash severity, injury data, vehicle information, and precise geographic coordinates. Last updated Oct. 27, 2026.

Breakdown by type: 592 accident, 380 construction, 1 closure.

973

Total Crashes

Filtered results

0

Fatalities

Fatal injury reports

2

Today

Reported since midnight

Today's Accidents Today's Fatalities

Crash locations on CA-4 W. Click a marker to view details.

Crash Records

CA-4 W Incidents 973 results

592 accident 380 construction 1 closure

Caltrans : Roadwork on CA-4 Eastbound and Westbound between Byron Hwy (Brentwood) and Balfour Rd (Antioch). All lanes closed. Avoid the area. From 7:00 PM Monday, October 26, 2026 to 5:00 AM Tuesday, October 27, 2026.

Contra Costa 1 hour, 58 minutes ago

CHP : Disabled vehicle on CA-4 Westbound east of CA-160 (Antioch). Center lane blocked. Expect delays.

Moderate Accident

Contra Costa 10 hours, 13 minutes ago

CHP : Traffic Collision on CA-4 Westbound at Hillcrest Ave (Antioch). Lane affected. Expect delays.

Moderate Accident

Contra Costa 1 day, 10 hours ago

CHP : Traffic Collision on CA-4 Westbound entering at Somersville Rd (Antioch). On Ramp blocked. Expect delays.

Contra Costa 1 day, 17 hours ago

Caltrans : Emergency road closure on CA-4 Eastbound and Westbound east of San Joaquin County Line (Discovery Bay). All lanes blocked. Expect delays. From 10:45 AM Saturday, October 24, 2026 to 10:00 AM Sunday, October 25, 2026.

Contra Costa 1 day, 20 hours ago

CHP : Disabled vehicle on CA-4 Westbound at Bailey Rd (Pittsburg). Right shoulder open. Expect delays.

Contra Costa 2 days, 5 hours ago

CHP : Traffic Hazard on CA-4 Westbound east of I-680 N (Martinez). 3rd lane from the left blocked. Expect delays.

Moderate Accident

Contra Costa 2 days, 17 hours ago

CHP : Residual delays on CA-4 Westbound east of Somersville Rd (Antioch). Center Divider affected. Expect delays.

Contra Costa 2 days, 18 hours ago

CHP : Traffic Hazard on CA-4 Westbound east of Willow Pass Rd (Concord). Right lane affected. Expect delays.

Moderate Accident

Contra Costa 2 days, 22 hours ago

Caltrans : Roadwork on CA-4 Eastbound and Westbound east of Byron Hwy (Brentwood). All lanes closed. Avoid the area. From 10:00 PM Friday, October 23, 2026 to 10:00 AM Sunday, October 25, 2026.

Contra Costa 2 days, 23 hours ago

Caltrans : Roadwork on CA-4 Westbound between Laurel Rd (Antioch) and CA-160 (Antioch). Right lane and shoulder closed until 5 AM. From 7:00 PM Friday, October 23, 2026 to 5:00 AM Saturday, October 24, 2026.

Contra Costa 3 days, 6 hours ago

CHP : Traffic Hazard on CA-4 Westbound east of A St (Antioch). Center lane blocked. Expect delays.

Moderate Accident

Contra Costa 3 days, 12 hours ago

Caltrans : Roadwork on CA-4 Westbound between Laurel Rd (Antioch) and CA-160 (Antioch). Right lane and shoulder closed until 5 AM. From 7:00 PM Thursday, October 22, 2026 to 5:00 AM Friday, October 23, 2026.

Contra Costa 4 days, 3 hours ago

CHP : Traffic Hazard on CA-4 Westbound east of San Jose Ave (Antioch). Lane affected. Expect delays.

Contra Costa 4 days, 15 hours ago

CHP : Traffic Hazard on CA-4 Westbound east of Morello Ave (Martinez). Center lane blocked. Expect delays.

Moderate Accident

Contra Costa 4 days, 16 hours ago

CHP : Residual delays on CA-4 Westbound east of Port Chicago Hwy (Concord). Right shoulder affected. Expect delays.

Moderate Accident

Contra Costa 5 days, 9 hours ago

CHP : Disabled vehicle on CA-4 Westbound east of Morello Ave (Martinez). Center lane blocked. Expect delays.

Moderate Accident

Contra Costa 5 days, 11 hours ago

Caltrans : Roadwork on CA-4 Westbound between Laurel Rd (Antioch) and CA-160 (Antioch). Right lane and shoulder closed until 5 AM. From 7:00 PM Tuesday, October 20, 2026 to 5:00 AM Wednesday, October 21, 2026.

Contra Costa 6 days, 4 hours ago

CHP : Residual delays on CA-4 Westbound entering at Sand Creek Rd (Brentwood). Left shoulder affected. Expect delays.

Contra Costa 6 days, 21 hours ago

Caltrans : Roadwork on CA-4 Westbound between Alhambra Ave (Martinez) and Mcewen Rd (Martinez). Various lanes closed until 5 AM. From 7:00 PM Monday, October 19, 2026 to 5:00 AM Tuesday, October 20, 2026.

Contra Costa 1 week ago

Caltrans : Roadwork on CA-4 Westbound between Lone Tree Way Bypass (Antioch) and Laurel Rd (Antioch). Right lane and shoulder closed until 5 AM. From 7:00 PM Monday, October 19, 2026 to 5:00 AM Tuesday, October 20, 2026.

Contra Costa 1 week ago

CHP : Traffic Hazard on CA-4 Westbound east of Alhambra Ave (Martinez). Right lane blocked. Expect delays.

Moderate Accident

Contra Costa 1 week ago

CHP : Traffic Collision on CA-4 Westbound exiting at A St (Antioch). Lane affected. Expect delays.

Moderate Accident

Contra Costa 1 week ago

CHP : Traffic Hazard on CA-4 Westbound at Pacheco Blvd (Pacheco). 3rd lane from the left affected. Expect delays.

Moderate Accident

Contra Costa 1 week ago

CHP : Traffic Hazard on CA-4 Westbound east of Port Chicago Hwy (Concord). Left and center lanes blocked. Expect delays.

Moderate Accident

Contra Costa 1 week ago

CHP : Traffic Collision on CA-4 Westbound east of Willow Pass Rd (Concord). Left and center lanes blocked. Expect delays.

Moderate Accident

Contra Costa 1 week ago

CHP : Traffic Collision on CA-4 Westbound west of Bailey Rd (Pittsburg). Lane affected. Expect delays.

Moderate Accident

Contra Costa 1 week ago

CHP : Traffic Collision on CA-4 Westbound east of Alhambra Ave (Martinez). Left and center lanes blocked. Expect delays.

Contra Costa 1 week ago

CHP : Severe traffic alert on CA-4 Westbound east of Laurel Rd (Antioch). Lanes open. Expect delays.

Contra Costa 1 week, 1 day ago

CHP : Disabled vehicle on CA-4 Westbound east of Loveridge Rd (Pittsburg). Lane affected. Expect delays.

Moderate Accident

Contra Costa 1 week, 1 day ago

Caltrans : Roadwork on CA-4 Westbound between Balfour Rd (Antioch) and Sand Creek Rd (Brentwood). Right lane and shoulder closed until 5 AM. From 7:00 PM Friday, October 16, 2026 to 5:00 AM Saturday, October 17, 2026.

Contra Costa 1 week, 3 days ago

Caltrans : Roadwork on CA-4 Westbound between Sand Creek Rd (Brentwood) and Lone Tree Way Bypass (Antioch). Right lane and shoulder closed until 5 AM. From 7:00 PM Friday, October 16, 2026 to 5:00 AM Saturday, October 17, 2026.

Contra Costa 1 week, 3 days ago

CHP : Traffic Collision with Injuries on CA-4 Westbound west of Port Chicago Hwy (Concord). Lanes open. Expect delays.

Contra Costa 1 week, 3 days ago

CHP : Traffic Collision on CA-4 Westbound at Bailey Rd (Pittsburg). Lane blocked. Expect delays.

Moderate Accident

Contra Costa 1 week, 3 days ago

CHP : Residual delays on CA-4 Westbound east of Bailey Rd (Pittsburg). Right shoulder affected. Expect delays.

Moderate Accident

Contra Costa 1 week, 3 days ago

CHP : Traffic Collision on CA-4 Westbound west of Railroad Ave (Pittsburg). Left lane blocked. Expect delays.

Moderate Accident

Contra Costa 1 week, 3 days ago

Caltrans : Roadwork on CA-4 Westbound between Balfour Rd (Antioch) and Sand Creek Rd (Brentwood). Right lane and shoulder closed until 5 AM. From 7:00 PM Thursday, October 15, 2026 to 5:00 AM Friday, October 16, 2026.

Contra Costa 1 week, 4 days ago

Caltrans : Roadwork on CA-4 Westbound between Sand Creek Rd (Brentwood) and Lone Tree Way Bypass (Antioch). Right lane and shoulder closed until 5 AM. From 7:00 PM Thursday, October 15, 2026 to 5:00 AM Friday, October 16, 2026.

Contra Costa 1 week, 4 days ago

CHP : Disabled vehicle on CA-4 Westbound east of Cummings Skwy (Port Costa). Center Divider affected. Expect delays.

Contra Costa 1 week, 4 days ago

CHP : Traffic Hazard on CA-4 Westbound east of Loveridge Rd (Pittsburg). 2nd lane from the left blocked. Expect delays.

Moderate Accident

Contra Costa 1 week, 4 days ago

Caltrans : Roadwork on CA-4 Eastbound and Westbound between Byron Hwy (Brentwood) and Marsh Creek Rd (Brentwood). All lanes closed. Avoid the area. From 7:00 PM Wednesday, October 14, 2026 to 8:00 AM Thursday, October 15, 2026.

Contra Costa 1 week, 5 days ago

CHP : Traffic Hazard on CA-4 Westbound east of G St (Antioch). 4th lane from the left blocked. Expect delays.

Moderate Accident

Contra Costa 1 week, 5 days ago

Caltrans : Roadwork on CA-4 Eastbound and Westbound between Byron Hwy (Brentwood) and Marsh Creek Rd (Brentwood). All lanes closed. Avoid the area. From 7:00 PM Tuesday, October 13, 2026 to 8:00 AM Wednesday, October 14, 2026.

Contra Costa 1 week, 6 days ago

CHP : Traffic Hazard on CA-4 Westbound at G St (Antioch). Lane affected. Expect delays.

Moderate Accident

Contra Costa 1 week, 6 days ago

Caltrans : Roadwork on CA-4 Eastbound and Westbound between Byron Hwy (Brentwood) and Marsh Creek Rd (Brentwood). All lanes closed. Avoid the area. From 7:00 PM Monday, October 12, 2026 to 8:00 AM Tuesday, October 13, 2026.

Contra Costa 1 week, 6 days ago

CHP : Traffic Hazard on CA-4 Westbound east of Loveridge Rd (Pittsburg). Lane affected. Expect delays.

Moderate Accident

Contra Costa 2 weeks, 1 day ago

CHP : Disabled vehicle on CA-4 Westbound at Hillcrest Ave (Antioch). Right lane affected. Expect delays.

Moderate Accident

Contra Costa 2 weeks, 1 day ago

CHP : Traffic Collision with Injuries on CA-4 Westbound east of Bayberry Ave (Hercules). Right shoulder affected. Expect delays.

Moderate Accident

Contra Costa 2 weeks, 2 days ago

CHP : Grass fire on CA-4 Westbound east of Port Chicago Hwy (Concord). Right lane blocked. Expect delays.

Moderate Accident

Contra Costa 2 weeks, 2 days ago

Caltrans : Roadwork on CA-4 Eastbound and Westbound between Byron Hwy (Brentwood) and Marsh Creek Rd (Brentwood). All lanes closed. Avoid the area. From 7:00 PM Friday, October 09, 2026 to 8:00 AM Saturday, October 10, 2026.

Contra Costa 2 weeks, 2 days ago