Accident Resolved

CHP : Traffic Collision on CA-4 Westbound west of Somersville Rd (Antioch). Lanes open. Expect delays.

A accident was reported on CA-4 W near Contra Costa on May 10, 2026 at 4:05 AM.

Road

CA-4 W

Area

Contra Costa

Address

Loading…

Started

May 9, 9:05 PM

Last Updated

5 months, 2 weeks ago

May 9, 9:15 PM

Resolved

May 10, 3:15 AM

Coordinates

38.0035, -121.8355

Update History

4 observations

CHP : Traffic Collision on CA-4 Westbound west of Somersville Rd (Antioch). Lanes open. Expect delays. May 9, 9:15 PM

CHP : Traffic Collision on CA-4 Westbound west of Somersville Rd (Antioch). Lanes open. Expect delays. May 9, 9:00 PM

CHP : Traffic Collision on CA-4 Westbound east of Somersville Rd (Antioch). Lanes open. Expect delays. May 9, 8:45 PM

CHP : Traffic Collision on CA-4 Westbound east of Somersville Rd (Antioch). Right shoulder affected. Expect delays. May 9, 8:30 PM

Source: 511_sfbay · ID 511.org/1492523 First seen May 9, 2026 8:30 PM