Accident Moderate Severity Resolved

CHP : Traffic Hazard on CA-4 Westbound east of Somersville Rd (Antioch). Left lanes blocked. Expect delays.

A injury accident was reported on CA-4 W near Contra Costa on June 20, 2026 at 2:54 PM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Jun 20, 7:54 AM

Last Updated

4 months, 1 week ago

Jun 20, 8:00 AM

Resolved

Jun 20, 2:15 PM

Coordinates

38.0035, -121.8355

Update History

1 observations

CHP : Traffic Hazard on CA-4 Westbound east of Somersville Rd (Antioch). Left lanes blocked. Expect delays. Jun 20, 8:00 AM

Source: 511_sfbay · ID 511.org/1510901 First seen Jun 20, 2026 8:00 AM