Accident High Severity Stale

CHP : Traffic Hazard on CA-4 Westbound ramp to CA-160 (Antioch). Connector ramp affected. Expect delays.

A high-severity accident was reported on CA-4 W near Contra Costa on May 31, 2026 at 11:21 PM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

May 31, 4:21 PM

Last Updated

1 hour, 11 minutes ago

May 31, 4:30 PM

Coordinates

37.9917, -121.7650

Update History

1 observations

CHP : Traffic Hazard on CA-4 Westbound ramp to CA-160 (Antioch). Connector ramp affected. Expect delays. May 31, 4:30 PM

Source: 511_sfbay · ID 511.org/1501833 First seen May 31, 2026 4:30 PM