Accident Moderate Severity Active

CHP : Traffic Collision on CA-4 Eastbound west of Willow Pass Rd (Pittsburg). Right shoulder affected. Expect delays.

A injury accident was reported on CA-4 E near Contra Costa on August 16, 2026 at 8:33 AM.

Road

CA-4 E

Area

Contra Costa

Address

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Started

Aug 16, 1:33 AM

Last Updated

10 minutes ago

Aug 16, 2:30 AM

Coordinates

38.0237, -121.9721

Update History

2 observations

CHP : Traffic Collision on CA-4 Eastbound west of Willow Pass Rd (Pittsburg). Right shoulder affected. Expect delays. Aug 16, 1:45 AM

CHP : Traffic Collision on CA-4 Eastbound west of Willow Pass Rd (Pittsburg). Right shoulder affected. Expect delays. Aug 16, 1:15 AM

Source: 511_sfbay · ID 511.org/1536261 First seen Aug 16, 2026 1:15 AM