Accident Moderate Severity Resolved

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

A injury accident was reported on CA-4 W near Contra Costa on September 11, 2026 at 2:11 AM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Sep 10, 7:11 PM

Last Updated

1 month, 2 weeks ago

Sep 10, 7:15 PM

Resolved

Sep 11, 1:30 AM

Coordinates

38.0124, -122.2343

Update History

1 observations

CHP : Traffic Hazard on CA-4 Westbound east of Sycamore Ave (Hercules). Left lane blocked. Expect delays. Sep 10, 7:15 PM

Source: 511_sfbay · ID 511.org/1547695 First seen Sep 10, 2026 7:15 PM