Accident Moderate Severity Resolved

CHP : Traffic Collision and Traffic Hazard on CA-4 Westbound east of CA-160 (Antioch). Left lane affected. Expect delays.

A injury accident was reported on CA-4 W near Contra Costa on September 26, 2026 at 1:36 AM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Sep 25, 6:36 PM

Last Updated

1 month ago

Sep 25, 6:45 PM

Resolved

Sep 26, 12:45 AM

Coordinates

37.9917, -121.7650

Update History

1 observations

CHP : Traffic Collision and Traffic Hazard on CA-4 Westbound east of CA-160 (Antioch). Left lane affected. Expect delays. Sep 25, 6:45 PM

Source: 511_sfbay · ID 511.org/1554918 First seen Sep 25, 2026 6:45 PM