Accident Moderate Severity Resolved

CHP : Traffic Collision with Injuries on CA-4 Westbound west of Somersville Rd (Antioch). Left lanes blocked. Expect delays.

A injury accident was reported on CA-4 W near Contra Costa on September 1, 2026 at 2:00 PM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Sep 1, 7:00 AM

Last Updated

1 month, 3 weeks ago

Sep 1, 7:30 AM

Resolved

Sep 1, 1:30 PM

Coordinates

38.0086, -121.8535

Update History

1 observations

CHP : Traffic Collision with Injuries on CA-4 Westbound west of Somersville Rd (Antioch). Left lanes blocked. Expect delays. Sep 1, 7:30 AM

Source: 511_sfbay · ID 511.org/1543586 First seen Sep 1, 2026 7:30 AM