Accident Moderate Severity Resolved

CHP : Traffic Hazard on CA-4 Westbound west of Somersville Rd (Antioch). Lanes blocked. Expect delays.

A injury accident was reported on CA-4 W near Contra Costa on September 24, 2026 at 8:44 PM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Sep 24, 1:44 PM

Last Updated

1 month ago

Sep 24, 2:30 PM

Resolved

Sep 24, 8:45 PM

Coordinates

38.0035, -121.8355

Update History

2 observations

CHP : Traffic Hazard on CA-4 Westbound west of Somersville Rd (Antioch). Lanes blocked. Expect delays. Sep 24, 2:30 PM

CHP : Traffic Hazard on CA-4 Westbound west of Somersville Rd (Antioch). Lanes blocked. Expect delays. Sep 24, 2:00 PM

Source: 511_sfbay · ID 511.org/1554228 First seen Sep 24, 2026 2:00 PM