Accident Moderate Severity Stale

CHP : Traffic Collision with Injuries on CA-4 Westbound at Cummings Skwy (Port Costa). Right lane blocked. Expect delays.

A injury accident was reported on CA-4 W near Contra Costa on November 4, 2026 at 1:03 PM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Nov 4, 5:03 AM

Last Updated

1 hour, 8 minutes ago

Nov 4, 5:45 AM

Coordinates

38.0141, -122.2382

Update History

2 observations

CHP : Traffic Collision with Injuries on CA-4 Westbound at Cummings Skwy (Port Costa). Right lane blocked. Expect delays. Nov 4, 5:45 AM

CHP : Traffic Collision with Injuries on CA-4 Westbound at Sycamore Ave (Hercules). Lanes blocked. Expect delays. Nov 4, 5:15 AM

Source: 511_sfbay · ID 511.org/1572709 First seen Nov 4, 2026 5:15 AM