Accident Moderate Severity Resolved

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

A injury accident was reported on CA-4 W near Contra Costa on August 13, 2026 at 12:10 AM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Aug 12, 5:10 PM

Last Updated

2 months, 2 weeks ago

Aug 12, 5:15 PM

Resolved

Aug 12, 11:15 PM

Coordinates

38.0145, -122.2524

Update History

1 observations

CHP : Traffic Hazard on CA-4 Westbound east of Sycamore Ave (Hercules). Right lane affected. Expect delays. Aug 12, 5:15 PM

Source: 511_sfbay · ID 511.org/1534703 First seen Aug 12, 2026 5:15 PM