Accident Moderate Severity Resolved

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

A injury accident was reported on CA-4 W near Contra Costa on October 3, 2026 at 1:49 AM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Oct 2, 6:49 PM

Last Updated

3 weeks, 3 days ago

Oct 2, 7:00 PM

Resolved

Oct 3, 1:15 AM

Coordinates

38.0035, -121.8355

Update History

1 observations

CHP : Traffic Hazard on CA-4 Westbound east of Somersville Rd (Antioch). Right lanes affected. Expect delays. Oct 2, 7:00 PM

Source: 511_sfbay · ID 511.org/1558265 First seen Oct 2, 2026 7:00 PM