Accident Moderate Severity Resolved

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

A injury accident was reported on CA-4 E near Contra Costa on June 13, 2026 at 6:37 AM.

Road

CA-4 E

Area

Contra Costa

Address

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Started

Jun 12, 11:37 PM

Last Updated

1 day, 20 hours ago

Jun 13, 12:15 AM

Resolved

Jun 13, 6:30 AM

Coordinates

38.0048, -121.8413

Update History

1 observations

CHP : Traffic Collision on CA-4 Eastbound west of Somersville Rd (Antioch). Right shoulder affected. Expect delays. Jun 12, 11:45 PM

Source: 511_sfbay · ID 511.org/1507764 First seen Jun 12, 2026 11:45 PM