Accident Moderate Severity Resolved

CHP : Traffic Hazard on CA-4 Eastbound west of Sycamore Ave (Hercules). Lane affected. Expect delays.

A injury accident was reported on CA-4 E near Contra Costa on October 5, 2026 at 11:42 PM.

Road

CA-4 E

Area

Contra Costa

Address

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Started

Oct 5, 4:42 PM

Last Updated

3 weeks ago

Oct 5, 5:00 PM

Resolved

Oct 5, 11:15 PM

Coordinates

38.0146, -122.2501

Update History

1 observations

CHP : Traffic Hazard on CA-4 Eastbound west of Sycamore Ave (Hercules). Lane affected. Expect delays. Oct 5, 4:45 PM

Source: 511_sfbay · ID 511.org/1559396 First seen Oct 5, 2026 4:45 PM