Accident High Severity Resolved

CHP : Traffic Collision on CA-4 Eastbound at Cummings Skwy (Port Costa). Off Ramp affected. Expect delays.

A high-severity accident was reported on CA-4 E near Contra Costa on April 11, 2026 at 6:34 AM.

Road

CA-4 E

Area

Contra Costa

Address

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Started

Apr 10, 11:34 PM

Last Updated

1 month, 4 weeks ago

Apr 10, 11:45 PM

Resolved

Apr 11, 6:00 AM

Coordinates

38.0129, -122.1960

Update History

4 observations

CHP : Traffic Collision on CA-4 Eastbound at Cummings Skwy (Port Costa). Off Ramp affected. Expect delays. Apr 10, 11:45 PM

CHP : Traffic Collision on CA-4 Eastbound at Cummings Skwy (Port Costa). Off Ramp affected. Expect delays. Apr 10, 11:30 PM

CHP : Traffic Collision on CA-4 Eastbound at Cummings Skwy (Port Costa). Off Ramp affected. Expect delays. Apr 10, 11:15 PM

CHP : Traffic Collision on CA-4 Eastbound at Cummings Skwy (Port Costa). Off Ramp affected. Expect delays. Apr 10, 11:00 PM

Source: 511_sfbay · ID 511.org/1479630 First seen Apr 10, 2026 11:00 PM