Accident Moderate Severity Stale

CHP : Traffic Hazard on CA-4 Eastbound west of Arnold Industrial Pl (Concord). Right shoulder affected. Expect delays.

A injury accident was reported on CA-4 E near Contra Costa on August 30, 2026 at 11:13 PM.

Road

CA-4 E

Area

Contra Costa

Address

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Started

Aug 30, 4:13 PM

Last Updated

1 hour, 2 minutes ago

Aug 30, 4:15 PM

Coordinates

38.0006, -122.0541

Update History

2 observations

CHP : Traffic Hazard on CA-4 Eastbound west of Arnold Industrial Pl (Concord). Right shoulder affected. Expect delays. Aug 30, 4:15 PM

CHP : Traffic Hazard on CA-4 Eastbound west of Arnold Industrial Pl (Concord). Lane affected. Expect delays. Aug 30, 4:00 PM

Source: 511_sfbay · ID 511.org/1542913 First seen Aug 30, 2026 4:00 PM