Accident Moderate Severity Resolved

CHP : Traffic Hazard on CA-4 Westbound east of Cummings Skwy (Port Costa). Right lane blocked. Expect delays.

A injury accident was reported on CA-4 W near Contra Costa on September 30, 2026 at 1:07 AM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Sep 29, 6:07 PM

Last Updated

3 weeks, 6 days ago

Sep 29, 6:30 PM

Resolved

Sep 30, 12:45 AM

Coordinates

38.0164, -122.1862

Update History

1 observations

CHP : Traffic Hazard on CA-4 Westbound east of Cummings Skwy (Port Costa). Right lane blocked. Expect delays. Sep 29, 6:15 PM

Source: 511_sfbay · ID 511.org/1556625 First seen Sep 29, 2026 6:15 PM