Accident Moderate Severity Resolved

CHP : Traffic Hazard on CA-4 Westbound east of Somersville Rd (Antioch). Center lanes affected. Expect delays.

A injury accident was reported on CA-4 W near Contra Costa on August 22, 2026 at 11:28 PM.

Road

CA-4 W

Area

Contra Costa

Address

Loading…

Started

Aug 22, 4:28 PM

Last Updated

2 months ago

Aug 22, 5:15 PM

Resolved

Aug 22, 11:15 PM

Coordinates

38.0052, -121.8419

Update History

1 observations

CHP : Traffic Hazard on CA-4 Westbound east of Somersville Rd (Antioch). Center lanes affected. Expect delays. Aug 22, 5:15 PM

Source: 511_sfbay · ID 511.org/1539433 First seen Aug 22, 2026 5:15 PM