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 June 18, 2026 at 1:14 AM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Jun 17, 6:14 PM

Last Updated

4 months, 1 week ago

Jun 17, 6:15 PM

Resolved

Jun 18, 12:15 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. Jun 17, 6:15 PM

Source: 511_sfbay · ID 511.org/1509634 First seen Jun 17, 2026 6:15 PM