Accident Moderate Severity Resolved

CHP : Traffic Collision on CA-4 Westbound west of Railroad Ave (Pittsburg). Left lane blocked. Expect delays.

A injury accident was reported on CA-4 W near Contra Costa on May 20, 2026 at 2:21 PM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

May 20, 7:21 AM

Last Updated

1 day, 6 hours ago

May 20, 8:00 AM

Resolved

May 20, 2:00 PM

Coordinates

38.0203, -121.9172

Update History

3 observations

CHP : Traffic Collision on CA-4 Westbound west of Railroad Ave (Pittsburg). Left lane blocked. Expect delays. May 20, 8:00 AM

CHP : Traffic Collision with Injuries on CA-4 Westbound west of Railroad Ave (Pittsburg). Left lanes blocked. Expect delays. May 20, 7:45 AM

CHP : Traffic Collision with Injuries on CA-4 Westbound entering at Railroad Ave (Pittsburg). Left lanes blocked. Expect delays. May 20, 7:30 AM

Source: 511_sfbay · ID 511.org/1497083 First seen May 20, 2026 7:30 AM