Accident Moderate Severity Resolved

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

A injury accident was reported on CA-4 W near Contra Costa on June 29, 2026 at 4:15 AM.

Road

CA-4 W

Area

Contra Costa

Address

Loading…

Started

Jun 28, 9:15 PM

Last Updated

3 months, 4 weeks ago

Jun 28, 9:45 PM

Resolved

Jun 29, 3:45 AM

Coordinates

38.0074, -121.8495

Update History

1 observations

CHP : Traffic Hazard on CA-4 Westbound east of Somersville Rd (Antioch). Lane affected. Expect delays. Jun 28, 9:30 PM

Source: 511_sfbay · ID 511.org/1514568 First seen Jun 28, 2026 9:30 PM