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 September 27, 2026 at 8:48 PM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Sep 27, 1:48 PM

Last Updated

1 month ago

Sep 27, 2:45 PM

Resolved

Sep 27, 9:00 PM

Coordinates

38.0214, -121.9821

Update History

2 observations

CHP : Traffic Collision on CA-4 Westbound east of Willow Pass Rd (Concord). Left and center lanes blocked. Expect delays. Sep 27, 2:15 PM

CHP : Traffic Collision on CA-4 Westbound east of Willow Pass Rd (Concord). Left and center lanes blocked. Expect delays. Sep 27, 2:00 PM

Source: 511_sfbay · ID 511.org/1555571 First seen Sep 27, 2026 2:00 PM