Accident Moderate Severity Resolved

CHP : Traffic Hazard on CA-4 Westbound east of Somersville Rd (Antioch). Right lane affected. Expect delays.

A injury accident was reported on CA-4 W near Contra Costa on May 3, 2026 at 4:10 PM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

May 3, 9:10 AM

Last Updated

5 months, 3 weeks ago

May 3, 9:30 AM

Resolved

May 3, 3:45 PM

Coordinates

38.0035, -121.8355

Update History

1 observations

CHP : Traffic Hazard on CA-4 Westbound east of Somersville Rd (Antioch). Right lane affected. Expect delays. May 3, 9:15 AM

Source: 511_sfbay · ID 511.org/1489529 First seen May 3, 2026 9:15 AM