CA · Highway

CA-4 W Accidents & Crashes

CA-4 W has recorded 993 traffic crashes in California since 2024, with no fatalities on record. In the last 24 hours, 4 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 Nov. 1, 2026.

Breakdown by type: 13 accident, 9 construction.

22

Total Crashes

Filtered results

0

Fatalities

Fatal injury reports

0

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 22 results

13 accident 9 construction

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

Moderate Accident

Contra Costa 5 hours, 39 minutes ago

CHP : Traffic Hazard on CA-4 Westbound west of G St (Antioch). 2nd lane from the left affected. Expect delays.

Moderate Accident

Contra Costa 5 hours, 39 minutes ago

CHP : Traffic Hazard on CA-4 Westbound east of Willow Pass Rd (Concord). 3rd lane from the left affected. Expect delays.

Moderate Accident

Contra Costa 6 hours, 24 minutes ago

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

Contra Costa 23 hours, 24 minutes ago

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

Moderate Accident

Contra Costa 1 day, 4 hours ago

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

Moderate Accident

Contra Costa 1 day, 6 hours ago

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 Friday, October 30, 2026 to 5:00 AM Saturday, October 31, 2026.

Contra Costa 1 day, 15 hours ago

Caltrans : Roadwork on CA-4 Westbound entering at Lone Tree Way Bypass (Antioch). On Ramp closed until 5 AM. From 8:00 PM Friday, October 30, 2026 to 5:00 AM Saturday, October 31, 2026.

Contra Costa 1 day, 19 hours ago

Caltrans : Roadwork on CA-4 Westbound entering at Hillcrest Ave (Antioch). On Ramp closed until 5 AM. From 10:00 PM Friday, October 30, 2026 to 5:00 AM Saturday, October 31, 2026.

Contra Costa 1 day, 19 hours ago

Caltrans : Roadwork on CA-4 Westbound exiting at Hillcrest Ave (Antioch). Off Ramp closed until 5 AM. From 7:00 PM Friday, October 30, 2026 to 5:00 AM Saturday, October 31, 2026.

Contra Costa 1 day, 19 hours ago

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

Moderate Accident

Contra Costa 1 day, 21 hours ago

CHP : Traffic Collision with Injuries on CA-4 Westbound ramp to CA-160 (Antioch). Lane affected. Expect delays.

Moderate Accident

Contra Costa 1 day, 23 hours ago

CHP : Traffic Hazard on CA-4 Westbound east of CA-160 (Antioch). Left and center lanes affected. Expect delays.

Moderate Accident

Contra Costa 2 days, 2 hours ago

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 Thursday, October 29, 2026 to 5:00 AM Friday, October 30, 2026.

Contra Costa 2 days, 15 hours ago

Caltrans : Roadwork on CA-4 Westbound between Balfour Rd (Antioch) and Sand Creek Rd (Brentwood). Lane closed until 5 AM. From 9:00 PM Thursday, October 29, 2026 to 5:00 AM Friday, October 30, 2026.

Contra Costa 2 days, 16 hours ago

CHP : Traffic Collision on CA-4 Westbound at Morello Ave (Martinez). Right lane blocked. Expect delays.

Moderate Accident

Contra Costa 3 days, 1 hour ago

Caltrans : Roadwork on CA-4 Eastbound and Westbound between Byron Hwy (Brentwood) and Walnut Blvd (Brentwood). All lanes closed. Avoid the area. From 7:00 PM Wednesday, October 28, 2026 to 5:00 AM Thursday, October 29, 2026.

Contra Costa 3 days, 15 hours ago

Caltrans : Roadwork on CA-4 Eastbound and Westbound between Byron Hwy (Brentwood) and Walnut Blvd (Brentwood). All lanes closed. Avoid the area. From 7:00 PM Tuesday, October 27, 2026 to 5:00 AM Wednesday, October 28, 2026.

Contra Costa 4 days, 15 hours ago

CHP : Traffic Hazard on CA-4 Westbound west of Discovery Bay Blvd (Discovery Bay). Lane affected. Expect delays.

Moderate Accident

Contra Costa 5 days, 12 hours ago

CHP : Traffic Hazard on CA-4 Westbound north of Byron Hwy (Brentwood). Lane affected. Expect delays.

Moderate Accident

Contra Costa 5 days, 12 hours ago

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 5 days, 15 hours ago

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

Moderate Accident

Contra Costa 6 days ago