Accident Moderate Severity Resolved

CHP : Traffic Collision on CA-4 Westbound east of Willow Pass Rd (Concord). Left and center lanes blocked. Expect delays.

A injury accident was reported on CA-4 W near Contra Costa on October 19, 2026 at 4:02 PM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Oct 19, 9:02 AM

Last Updated

1 week, 1 day ago

Oct 19, 9:45 AM

Resolved

Oct 19, 4:00 PM

Coordinates

38.0230, -121.9648

Update History

2 observations

CHP : Traffic Collision on CA-4 Westbound east of Willow Pass Rd (Concord). Left and center lanes blocked. Expect delays. Oct 19, 9:45 AM

CHP : Traffic Collision on CA-4 Westbound east of Willow Pass Rd (Concord). Left and center lanes blocked. Expect delays. Oct 19, 9:15 AM

Source: 511_sfbay · ID 511.org/1565733 First seen Oct 19, 2026 9:15 AM