CA-4 W · Last 48 Hours

CA-4 W Accident Today

3 accidents on CA-4 W in the last 24 hours · 10 in 48 hours · updated April 22, 2026 10:48 AM PDT

3

Last 24h

10

Last 48h

2

High Severity

22

This Week

10

Accident

7-Day Trend

22 crashes

→ About the same

22 crashes in the last 7 days, about the same as the previous week (23).

Last 6 hours

1 incident

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

12–24 hours ago

2 incidents

22h ago 12:30 PM

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

23h ago 11:00 AM

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

24–48 hours ago

7 incidents

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

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

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

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

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

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

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

Frequently Asked Questions

Are accidents on CA-4 W reported live?

Yes — this page refreshes throughout the day as new incidents are logged by the California Highway Patrol. Crash data typically appears within 15–30 minutes of being reported.

How many accidents happened on CA-4 W in the last 7 days?

22 crashes were reported on CA-4 W in the last 7 days.

What type of accident is most common on CA-4 W?

Accident are the most frequently reported incident type on CA-4 W based on recent data.

Where can I see all California accidents today?

A live feed of all active crashes across California is available on the California accidents today page.

Where does this crash data come from?

Crash data is sourced from the California Highway Patrol (CHP) Computer-Aided Dispatch feed and the CCRS historical crash database. Learn more about our data sources.