Accident High Severity Resolved

CHP : Traffic Collision on CA-4 Eastbound entering at Port Chicago Hwy (Concord). On Ramp blocked. Expect delays.

A high-severity accident was reported on CA-4 E near Contra Costa on September 10, 2026 at 1:58 AM.

Road

CA-4 E

Area

Contra Costa

Address

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Started

Sep 9, 6:58 PM

Last Updated

1 month, 2 weeks ago

Sep 9, 7:00 PM

Resolved

Sep 10, 1:00 AM

Coordinates

38.0099, -122.0184

Update History

1 observations

CHP : Traffic Collision on CA-4 Eastbound entering at Port Chicago Hwy (Concord). On Ramp blocked. Expect delays. Sep 9, 7:00 PM

Source: 511_sfbay · ID 511.org/1547114 First seen Sep 9, 2026 7:00 PM