Accident Moderate Severity Resolved

CHP : Traffic Hazard on CA-4 Westbound east of Willow Pass Rd (Concord). Left lanes affected. Expect delays.

A injury accident was reported on CA-4 W near Contra Costa on August 11, 2026 at 2:49 AM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Aug 10, 7:49 PM

Last Updated

9 hours, 7 minutes ago

Aug 10, 8:00 PM

Resolved

Aug 11, 2:00 AM

Coordinates

38.0174, -121.9905

Update History

1 observations

CHP : Traffic Hazard on CA-4 Westbound east of Willow Pass Rd (Concord). Left lanes affected. Expect delays. Aug 10, 8:00 PM

Source: 511_sfbay · ID 511.org/1533720 First seen Aug 10, 2026 8:00 PM