Accident Moderate Severity Resolved

CHP : Traffic Hazard on CA-4 Eastbound west of Hillcrest Ave (Antioch). Right lanes blocked. Expect delays.

A injury accident was reported on CA-4 E near Contra Costa on August 21, 2026 at 5:58 PM.

Road

CA-4 E

Area

Contra Costa

Address

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Started

Aug 21, 10:58 AM

Last Updated

3 days, 5 hours ago

Aug 21, 12:30 PM

Resolved

Aug 21, 6:30 PM

Coordinates

37.9968, -121.7897

Update History

3 observations

CHP : Traffic Hazard on CA-4 Eastbound west of Hillcrest Ave (Antioch). Right lanes blocked. Expect delays. Aug 21, 12:15 PM

CHP : Traffic Hazard on CA-4 Eastbound west of Hillcrest Ave (Antioch). Right lanes blocked. Expect delays. Aug 21, 11:45 AM

CHP : Traffic Hazard on CA-4 Eastbound west of Hillcrest Ave (Antioch). 3rd lane from the left blocked. Expect delays. Aug 21, 11:15 AM

Source: 511_sfbay · ID 511.org/1538848 First seen Aug 21, 2026 11:15 AM