Accident Moderate Severity Stale

CHP : Traffic Hazard on CA-4 Westbound east of G St (Antioch). Left lane blocked. Expect delays.

A injury accident was reported on CA-4 W near Contra Costa on June 18, 2026 at 11:09 PM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Jun 18, 4:09 PM

Last Updated

1 hour, 51 minutes ago

Jun 18, 4:15 PM

Coordinates

37.9987, -121.8180

Update History

1 observations

CHP : Traffic Hazard on CA-4 Westbound east of G St (Antioch). Left lane blocked. Expect delays. Jun 18, 4:15 PM

Source: 511_sfbay · ID 511.org/1510105 First seen Jun 18, 2026 4:15 PM