Accident Moderate Severity Resolved

CHP : Traffic Hazard on CA-4 Westbound south of Arnold Industrial Way (Concord). Right shoulder affected. Expect delays.

A injury accident was reported on CA-4 W near Contra Costa on September 8, 2026 at 1:56 AM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Sep 7, 6:56 PM

Last Updated

1 month, 2 weeks ago

Sep 7, 7:00 PM

Resolved

Sep 8, 1:00 AM

Coordinates

38.0023, -122.0472

Update History

1 observations

CHP : Traffic Hazard on CA-4 Westbound south of Arnold Industrial Way (Concord). Right shoulder affected. Expect delays. Sep 7, 7:00 PM

Source: 511_sfbay · ID 511.org/1546193 First seen Sep 7, 2026 7:00 PM