Accident Moderate Severity Resolved

CHP : Traffic Collision on CA-4 Eastbound south of Somersville Rd (Antioch). Right shoulder affected. Expect delays.

A injury accident was reported on CA-4 E near Contra Costa on June 21, 2026 at 7:54 AM.

Road

CA-4 E

Area

Contra Costa

Address

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Started

Jun 21, 12:54 AM

Last Updated

4 months ago

Jun 21, 1:00 AM

Resolved

Jun 21, 7:00 AM

Coordinates

38.0024, -121.8327

Update History

1 observations

CHP : Traffic Collision on CA-4 Eastbound south of Somersville Rd (Antioch). Right shoulder affected. Expect delays. Jun 21, 1:00 AM

Source: 511_sfbay · ID 511.org/1511161 First seen Jun 21, 2026 1:00 AM