Accident Moderate Severity Resolved

CHP : Traffic Hazard on CA-4 Westbound east of Hillcrest Ave (Antioch). Left lanes affected. Expect delays.

A injury accident was reported on CA-4 W near Contra Costa on May 12, 2026 at 2:50 AM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

May 11, 7:50 PM

Last Updated

5 months, 2 weeks ago

May 11, 8:00 PM

Resolved

May 12, 2:00 AM

Coordinates

37.9972, -121.7901

Update History

1 observations

CHP : Traffic Hazard on CA-4 Westbound east of Hillcrest Ave (Antioch). Left lanes affected. Expect delays. May 11, 8:00 PM

Source: 511_sfbay · ID 511.org/1493157 First seen May 11, 2026 8:00 PM