Accident Moderate Severity Resolved

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

A injury accident was reported on CA-4 W near Contra Costa on August 31, 2026 at 10:05 PM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Aug 31, 3:05 PM

Last Updated

1 month, 3 weeks ago

Aug 31, 4:30 PM

Resolved

Aug 31, 10:30 PM

Coordinates

38.0140, -121.9974

Update History

2 observations

CHP : Traffic Hazard on CA-4 Westbound east of Willow Pass Rd (Concord). Center lanes affected. Expect delays. Aug 31, 4:15 PM

CHP : Traffic Hazard on CA-4 Westbound east of Willow Pass Rd (Concord). Center lanes affected. Expect delays. Aug 31, 3:15 PM

Source: 511_sfbay · ID 511.org/1543299 First seen Aug 31, 2026 3:15 PM