Accident High Severity Resolved

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

A high-severity accident was reported on CA-4 W near Contra Costa on June 28, 2026 at 1:40 PM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Jun 28, 6:40 AM

Last Updated

1 month ago

Jun 28, 7:45 AM

Resolved

Jun 28, 2:00 PM

Coordinates

38.0163, -122.1862

Update History

1 observations

CHP : Traffic Collision on CA-4 Westbound east of Cummings Skwy (Port Costa). Lanes blocked. Expect delays. Jun 28, 7:00 AM

Source: 511_sfbay · ID 511.org/1514327 First seen Jun 28, 2026 7:00 AM