Accident Moderate Severity Resolved

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

A injury accident was reported on CA-4 W near Contra Costa on April 18, 2026 at 2:07 AM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Apr 17, 7:07 PM

Last Updated

6 months, 1 week ago

Apr 17, 7:15 PM

Resolved

Apr 18, 1:15 AM

Coordinates

38.0052, -121.8419

Update History

1 observations

CHP : Traffic Hazard on CA-4 Westbound west of Somersville Rd (Antioch). Lane blocked. Expect delays. Apr 17, 7:15 PM

Source: 511_sfbay · ID 511.org/1482867 First seen Apr 17, 2026 7:15 PM