Accident High Severity Stale

CHP : Traffic Collision and Brush fire on CA-4 Westbound entering at Cummings Skwy (Port Costa). On Ramp closed. Expect delays.

A high-severity accident was reported on CA-4 W near Contra Costa on June 11, 2026 at 12:17 AM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Jun 10, 5:17 PM

Last Updated

45 minutes ago

Jun 10, 7:00 PM

Coordinates

38.0164, -122.1895

Update History

5 observations

CHP : Traffic Collision and Brush fire on CA-4 Westbound entering at Cummings Skwy (Port Costa). On Ramp closed. Expect delays. Jun 10, 6:45 PM

CHP : Traffic Collision and Brush fire on CA-4 Westbound exiting at Cummings Skwy (Port Costa). Off Ramp closed. Expect delays. Jun 10, 6:00 PM

CHP : Traffic Collision and Brush fire on CA-4 Westbound exiting at Cummings Skwy (Port Costa). Off Ramp closed. Expect delays. Jun 10, 5:30 PM

CHP : Traffic Collision on CA-4 Eastbound north of Cummings Skwy (Port Costa). Lane affected. Expect delays. Jun 10, 5:15 PM

CHP : Traffic Collision on CA-4 Eastbound north of Cummings Skwy (Port Costa). Off Ramp affected. Expect delays. Jun 10, 4:45 PM

Source: 511_sfbay · ID 511.org/1506472 First seen Jun 10, 2026 4:45 PM