Accident Moderate Severity Resolved

CHP : Traffic Hazard on CA-4 Eastbound east of Somersville Rd (Antioch). Lane affected. Expect delays.

A injury accident was reported on CA-4 E near Contra Costa on October 12, 2026 at 12:57 AM.

Road

CA-4 E

Area

Contra Costa

Address

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Started

Oct 11, 5:57 PM

Last Updated

2 weeks, 1 day ago

Oct 11, 6:00 PM

Resolved

Oct 12, 12:15 AM

Coordinates

38.0024, -121.8327

Update History

1 observations

CHP : Traffic Hazard on CA-4 Eastbound east of Somersville Rd (Antioch). Lane affected. Expect delays. Oct 11, 6:00 PM

Source: 511_sfbay · ID 511.org/1562367 First seen Oct 11, 2026 6:00 PM