Accident High Severity Resolved

CHP : Traffic Collision on CA-4 Eastbound west of Port Chicago Hwy (Concord). On Ramp affected. Expect delays.

A high-severity accident was reported on CA-4 E near Contra Costa on October 6, 2026 at 12:53 AM.

Road

CA-4 E

Area

Contra Costa

Address

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Started

Oct 5, 5:53 PM

Last Updated

3 weeks ago

Oct 5, 6:15 PM

Resolved

Oct 6, 12:15 AM

Coordinates

38.0126, -122.0023

Update History

1 observations

CHP : Traffic Collision on CA-4 Eastbound west of Port Chicago Hwy (Concord). On Ramp affected. Expect delays. Oct 5, 6:00 PM

Source: 511_sfbay · ID 511.org/1559414 First seen Oct 5, 2026 6:00 PM