Accident High Severity Resolved

CHP : Disabled vehicle on CA-4 Westbound exiting at Somersville Rd (Antioch). Off Ramp affected. Expect delays.

A high-severity accident was reported on CA-4 W near Contra Costa on April 11, 2026 at 1:10 AM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Apr 10, 6:10 PM

Last Updated

1 month, 4 weeks ago

Apr 10, 7:30 PM

Resolved

Apr 11, 1:30 AM

Coordinates

38.0036, -121.8356

Update History

4 observations

CHP : Disabled vehicle on CA-4 Westbound exiting at Somersville Rd (Antioch). Off Ramp affected. Expect delays. Apr 10, 7:15 PM

CHP : Disabled vehicle on CA-4 Westbound exiting at Somersville Rd (Antioch). Off Ramp affected. Expect delays. Apr 10, 6:45 PM

CHP : Disabled vehicle on CA-4 Westbound exiting at Somersville Rd (Antioch). Off Ramp affected. Expect delays. Apr 10, 6:30 PM

CHP : Disabled vehicle on CA-4 Westbound south of Somersville Rd (Antioch). Lane affected. Expect delays. Apr 10, 6:15 PM

Source: 511_sfbay · ID 511.org/1479568 First seen Apr 10, 2026 6:15 PM