Accident Moderate Severity Resolved

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

A injury accident was reported on CA-4 W near Contra Costa on May 11, 2026 at 2:33 AM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

May 10, 7:33 PM

Last Updated

5 months, 2 weeks ago

May 10, 7:45 PM

Resolved

May 11, 2:00 AM

Coordinates

37.9984, -121.8016

Update History

1 observations

CHP : Traffic Hazard on CA-4 Westbound east of A St (Antioch). Lane affected. Expect delays. May 10, 7:45 PM

Source: 511_sfbay · ID 511.org/1492753 First seen May 10, 2026 7:45 PM