Accident High Severity Stale

CHP : Traffic Hazard on CA-4 Westbound east of Sycamore Ave (Hercules). Center lanes affected. Expect delays.

A high-severity accident was reported on CA-4 W near Contra Costa on August 5, 2026 at 11:11 PM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Aug 5, 4:11 PM

Last Updated

5 hours, 17 minutes ago

Aug 5, 4:15 PM

Coordinates

38.0144, -122.2523

Update History

1 observations

CHP : Traffic Hazard on CA-4 Westbound east of Sycamore Ave (Hercules). Center lanes affected. Expect delays. Aug 5, 4:15 PM

Source: 511_sfbay · ID 511.org/1531426 First seen Aug 5, 2026 4:15 PM