Accident Moderate Severity Resolved

CHP : Residual delays on CA-4 Westbound west of Cummings Skwy (Port Costa). Left lane closed. Expect delays.

A injury accident was reported on CA-4 W near Contra Costa on June 8, 2026 at 4:24 PM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Jun 8, 9:24 AM

Last Updated

1 day, 11 hours ago

Jun 8, 3:00 PM

Resolved

Jun 8, 9:15 PM

Coordinates

38.0124, -122.2343

Update History

3 observations

CHP : Residual delays on CA-4 Westbound west of Cummings Skwy (Port Costa). Left lane closed. Expect delays. Jun 8, 3:00 PM

CHP : Severe traffic alert and Emergency roadwork on CA-4 Westbound west of Cummings Skwy (Port Costa). Left lane closed. Expect delays. Jun 8, 1:30 PM

CHP : Severe traffic alert and Emergency roadwork on CA-4 Westbound west of Cummings Skwy (Port Costa). Left lane closed. Expect delays. Jun 8, 12:45 PM

Source: 511_sfbay · ID 511.org/1505281 First seen Jun 8, 2026 12:45 PM

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