Accident Moderate Severity Resolved

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

A injury accident was reported on CA-4 W near Contra Costa on July 5, 2026 at 6:12 PM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Jul 5, 11:12 AM

Last Updated

3 months, 3 weeks ago

Jul 5, 11:15 AM

Resolved

Jul 5, 5:15 PM

Coordinates

38.0052, -121.8419

Update History

1 observations

CHP : Traffic Hazard on CA-4 Westbound east of Somersville Rd (Antioch). Lane affected. Expect delays. Jul 5, 11:15 AM

Source: 511_sfbay · ID 511.org/1517002 First seen Jul 5, 2026 11:15 AM