Accident Moderate Severity Resolved

CHP : Residual delays on CA-4 Westbound east of Somersville Rd (Antioch). Right shoulder affected. Expect delays.

A injury accident was reported on CA-4 W near Contra Costa on August 29, 2026 at 5:32 PM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Aug 29, 10:32 AM

Last Updated

1 day, 3 hours ago

Aug 29, 10:45 AM

Resolved

Aug 29, 4:45 PM

Coordinates

38.0035, -121.8355

Update History

1 observations

CHP : Residual delays on CA-4 Westbound east of Somersville Rd (Antioch). Right shoulder affected. Expect delays. Aug 29, 10:45 AM

Source: 511_sfbay · ID 511.org/1542537 First seen Aug 29, 2026 10:45 AM