Accident Moderate Severity Resolved

CHP : Traffic Collision on CA-4 Eastbound west of CA-242 S (Concord). Right lane blocked. Expect delays.

A injury accident was reported on CA-4 E near Contra Costa on August 11, 2026 at 1:16 AM.

Road

CA-4 E

Area

Contra Costa

Address

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Started

Aug 10, 6:16 PM

Last Updated

1 day, 11 hours ago

Aug 10, 8:00 PM

Resolved

Aug 11, 2:00 AM

Coordinates

38.0037, -122.0419

Update History

5 observations

CHP : Traffic Collision on CA-4 Eastbound west of CA-242 S (Concord). Right lane blocked. Expect delays. Aug 10, 7:45 PM

CHP : Traffic Collision on CA-4 Eastbound west of CA-242 S (Concord). Right lane blocked. Expect delays. Aug 10, 7:15 PM

CHP : Traffic Collision on CA-4 Eastbound west of CA-242 S (Concord). Right lane blocked. Expect delays. Aug 10, 6:45 PM

CHP : Traffic Collision on CA-4 Eastbound west of CA-242 S (Concord). Center lanes blocked. Expect delays. Aug 10, 6:30 PM

CHP : Traffic Collision on CA-4 Eastbound west of CA-242 S (Concord). 2nd lane from the left affected. Expect delays. Aug 10, 6:15 PM

Source: 511_sfbay · ID 511.org/1533687 First seen Aug 10, 2026 6:15 PM