Accident Moderate Severity Stale

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

A injury accident was reported on CA-4 W near Contra Costa on August 21, 2026 at 2:42 AM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Aug 20, 7:42 PM

Last Updated

36 minutes ago

Aug 20, 8:00 PM

Coordinates

37.9987, -121.8180

Update History

1 observations

CHP : Traffic Hazard on CA-4 Westbound east of G St (Antioch). Lane affected. Expect delays. Aug 20, 7:45 PM

Source: 511_sfbay · ID 511.org/1538582 First seen Aug 20, 2026 7:45 PM