Accident Moderate Severity Resolved

CHP : Traffic Collision on CA-4 Eastbound west of Sycamore Ave (Hercules). Right shoulder affected. Expect delays.

A injury accident was reported on CA-4 E near Contra Costa on October 23, 2026 at 5:05 AM.

Road

CA-4 E

Area

Contra Costa

Address

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Started

Oct 22, 10:05 PM

Last Updated

4 days, 14 hours ago

Oct 22, 10:15 PM

Resolved

Oct 23, 4:15 AM

Coordinates

38.0093, -122.2270

Update History

3 observations

CHP : Traffic Collision on CA-4 Eastbound west of Sycamore Ave (Hercules). Right shoulder affected. Expect delays. Oct 22, 10:15 PM

CHP : Traffic Collision on CA-4 Eastbound west of Sycamore Ave (Hercules). 2nd lane from the left blocked. Expect delays. Oct 22, 10:00 PM

CHP : Traffic Collision on CA-4 Eastbound west of Sycamore Ave (Hercules). Right lane affected. Expect delays. Oct 22, 9:15 PM

Source: 511_sfbay · ID 511.org/1567406 First seen Oct 22, 2026 9:15 PM