Accident Moderate Severity Resolved

CHP : Traffic Collision on CA-4 Westbound at Willow Pass Rd (Concord). Lane affected. Expect delays.

A injury accident was reported on CA-4 W near Contra Costa on October 4, 2026 at 4:50 AM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Oct 3, 9:50 PM

Last Updated

3 weeks, 2 days ago

Oct 3, 10:00 PM

Resolved

Oct 4, 4:15 AM

Coordinates

38.0240, -121.9710

Update History

2 observations

CHP : Traffic Collision on CA-4 Westbound at Willow Pass Rd (Concord). Lane affected. Expect delays. Oct 3, 10:00 PM

CHP : Traffic Collision on CA-4 Westbound at Willow Pass Rd (Concord). Left lane affected. Expect delays. Oct 3, 9:30 PM

Source: 511_sfbay · ID 511.org/1558714 First seen Oct 3, 2026 9:30 PM