Accident High Severity Resolved

CHP : Traffic Hazard on CA-4 Westbound south of Somersville Rd (Antioch). On Ramp blocked. Expect delays.

A high-severity accident was reported on CA-4 W near Contra Costa on June 25, 2026 at 7:34 AM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Jun 25, 12:34 AM

Last Updated

1 month ago

Jun 25, 1:30 AM

Resolved

Jun 25, 7:30 AM

Coordinates

38.0035, -121.8355

Update History

1 observations

CHP : Traffic Hazard on CA-4 Westbound south of Somersville Rd (Antioch). On Ramp blocked. Expect delays. Jun 25, 12:45 AM

Source: 511_sfbay · ID 511.org/1512881 First seen Jun 25, 2026 12:45 AM