CA · Highway

CA-4 W Accidents & Crashes

CA-4 W has recorded 58 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 April 22, 2026.

Breakdown by type: 51 accident, 1 construction.

52

Total Crashes

Filtered results

0

Fatalities

Fatal injury reports

1

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 52 results

51 accident 1 construction

CHP : Disabled vehicle on CA-4 Westbound ramp to I-80 W (Hercules). Connector ramp affected. Expect delays.

Contra Costa 5 hours, 33 minutes ago

CHP : Traffic Hazard on CA-4 Westbound entering at Cummings Skwy (Port Costa). Lane affected. Expect delays.

Moderate Accident

Contra Costa 23 hours, 33 minutes ago

CHP : Traffic Collision on CA-4 Westbound west of Bixler Rd (Discovery Bay). Lane affected. Expect delays.

Moderate Accident

Contra Costa 1 day, 1 hour ago

CHP : Traffic Collision on CA-4 Westbound east of I-80 W (Hercules). Lane affected. Expect delays.

Contra Costa 1 day, 3 hours ago

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

Moderate Accident

Contra Costa 1 day, 3 hours ago

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

Moderate Accident

Contra Costa 1 day, 5 hours ago

CHP : Traffic Collision on CA-4 Westbound east of Lone Tree Way Bypass (Antioch). Left lane affected. Expect delays.

Moderate Accident

Contra Costa 1 day, 7 hours ago

CHP : Residual delays on CA-4 Westbound east of A St (Antioch). Right shoulder affected. Expect delays.

Moderate Accident

Contra Costa 1 day, 7 hours ago

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

Moderate Accident

Contra Costa 1 day, 18 hours ago

CHP : Traffic Collision on CA-4 Westbound west of Lone Tree Way Bypass (Antioch). Lane affected. Expect delays.

Moderate Accident

Contra Costa 1 day, 18 hours ago

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

Moderate Accident

Contra Costa 2 days, 17 hours ago

CHP : Disabled vehicle on CA-4 Westbound east of I-680 N (Martinez). Right shoulder affected. Expect delays.

Moderate Accident

Contra Costa 2 days, 18 hours ago

CHP : Traffic Hazard on CA-4 Westbound east of Pacheco Blvd (Pacheco). Right shoulder affected. Expect delays.

Moderate Accident

Contra Costa 2 days, 20 hours ago

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

Moderate Accident

Contra Costa 2 days, 21 hours ago

CHP : Traffic Hazard on CA-4 Westbound east of A St (Antioch). On Ramp affected. Expect delays.

Contra Costa 3 days, 5 hours ago

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

Moderate Accident

Contra Costa 3 days, 20 hours ago

CHP : Traffic Hazard on CA-4 Westbound west of Somersville Rd (Antioch). Lane blocked. Expect delays.

Moderate Accident

Contra Costa 4 days, 17 hours ago

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

Moderate Accident

Contra Costa 4 days, 17 hours ago

CHP : Brush fire on CA-4 Westbound at Port Chicago Hwy (Concord). Right shoulder affected. Expect delays.

Moderate Accident

Contra Costa 4 days, 18 hours ago

CHP : Traffic Hazard on CA-4 Westbound at San Joaquin County Line (Byron). Lane affected. Expect delays.

Moderate Accident

Contra Costa 6 days, 16 hours ago

CHP : Disabled tractor trailer on CA-4 Westbound at San Joaquin County Line (Byron). Lane affected. Expect delays.

Moderate Accident

Contra Costa 6 days, 16 hours ago

CHP : Traffic Hazard on CA-4 Westbound ramp to I-680 N (Martinez). Connector ramp affected. Expect delays.

Contra Costa 6 days, 17 hours ago

CHP : Traffic Hazard on CA-4 Westbound entering at Loveridge Rd (Pittsburg). Right lanes blocked. Expect delays.

Moderate Accident

Contra Costa 1 week ago

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

Moderate Accident

Contra Costa 1 week ago

Caltrans : Roadwork on CA-4 Westbound between Mcewen Rd (Martinez) and Bayberry Ave (Hercules). Right lane and shoulder closed until 6 AM. From 7:00 PM Tuesday, April 14, 2026 to 6:00 AM Wednesday, April 15, 2026.

Contra Costa 1 week ago

CHP : Disabled truck on CA-4 Westbound exiting at Alhambra Ave (Martinez). Left lane blocked. Expect delays.

Moderate Accident

Contra Costa 1 week, 1 day ago

CHP : Traffic Hazard on CA-4 Westbound east of I-680 N (Martinez). Lanes affected. Expect delays.

Moderate Accident

Contra Costa 1 week, 1 day ago

CHP : Traffic Collision on CA-4 Westbound east of I-80 W (Hercules). Left lane blocked. Expect delays.

Contra Costa 1 week, 2 days ago

CHP : Traffic Collision with Injuries on CA-4 Westbound west of Railroad Ave (Pittsburg). Lane affected. Expect delays.

Moderate Accident

Contra Costa 1 week, 2 days ago

CHP : Traffic Collision on CA-4 Westbound west of Laurel Rd (Antioch). Left shoulder affected. Expect delays.

Moderate Accident

Contra Costa 1 week, 3 days ago

CHP : Traffic Collision on CA-4 Westbound east of Balfour Rd (Antioch). Lane blocked. Expect delays.

Contra Costa 1 week, 3 days ago

CHP : Fire on CA-4 Westbound at Port Chicago Hwy (Concord). Lane affected. Expect delays.

Moderate Accident

Contra Costa 1 week, 4 days ago

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

Moderate Accident

Contra Costa 1 week, 4 days ago

CHP : Traffic Collision with Injuries on CA-4 Westbound east of Railroad Ave (Pittsburg). Lanes open. Expect delays.

Contra Costa 1 week, 4 days ago

CHP : Severe traffic alert and Traffic Collision with Injuries on CA-4 Westbound east of Bailey Rd (Pittsburg). Left lanes blocked. Expect delays.

Contra Costa 1 week, 4 days ago

CHP : Disabled vehicle on CA-4 Westbound exiting at Somersville Rd (Antioch). Off Ramp affected. Expect delays.

Contra Costa 1 week, 4 days ago

CHP : Traffic Collision with Injuries on CA-4 Westbound east of Port Chicago Hwy (Concord). 2nd lane from the left affected. Expect delays.

Moderate Accident

Contra Costa 1 week, 4 days ago

CHP : Signal problem on CA-4 Eastbound and Westbound at Walnut Blvd (Brentwood). Lanes affected. Expect delays.

Contra Costa 1 week, 5 days ago

CHP : Traffic Collision on CA-4 Westbound at A St (Antioch). Left lane blocked. Expect delays.

Moderate Accident

Contra Costa 1 week, 5 days ago

CHP : Traffic Collision on CA-4 Westbound east of Bailey Rd (Pittsburg). On Ramp affected. Expect delays.

Contra Costa 1 week, 5 days ago

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

Moderate Accident

Contra Costa 1 week, 5 days ago

CHP : Traffic Hazard on CA-4 Westbound west of Lone Tree Way Bypass (Antioch). Lane affected. Expect delays.

Moderate Accident

Contra Costa 1 week, 6 days ago

CHP : Traffic Collision on CA-4 Westbound entering at Alhambra Ave (Martinez). On Ramp blocked. Expect delays.

Contra Costa 2 weeks ago

CHP : Traffic Hazard on CA-4 Westbound west of Loveridge Rd (Pittsburg). Left lane blocked. Expect delays.

Moderate Accident

Contra Costa 2 weeks ago

CHP : Traffic Hazard on CA-4 Westbound west of Alhambra Ave (Martinez). Left lane affected. Expect delays.

Moderate Accident

Contra Costa 2 weeks ago

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

Moderate Accident

Contra Costa 2 weeks, 1 day ago

CHP : Residual delays on CA-4 Westbound at Bailey Rd (Pittsburg). All lanes open. Expect delays.

Contra Costa 2 weeks, 1 day ago

CHP : Traffic Hazard on CA-4 Westbound east of Arnold Industrial Way (Concord). Lane blocked. Expect delays.

Moderate Accident

Contra Costa 2 weeks, 1 day ago

CHP : Vehicle fire on CA-4 Westbound west of Bailey Rd (Pittsburg). Right lanes blocked. Expect delays.

Moderate Accident

Contra Costa 2 weeks, 2 days ago

CHP : Disabled vehicle on CA-4 Westbound at Lone Tree Way Bypass (Antioch). On Ramp blocked. Expect delays.

Contra Costa 2 weeks, 2 days ago