Accident High Severity Resolved

CHP : Residual delays on CA-4 Westbound east of San Jose Ave (Antioch). Right shoulder affected. Expect delays.

A high-severity accident was reported on CA-4 W near Contra Costa on September 3, 2026 at 3:04 AM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Sep 2, 8:04 PM

Last Updated

1 month, 3 weeks ago

Sep 2, 8:15 PM

Resolved

Sep 3, 2:15 AM

Coordinates

37.9407, -121.7400

Update History

1 observations

CHP : Residual delays on CA-4 Westbound east of San Jose Ave (Antioch). Right shoulder affected. Expect delays. Sep 2, 8:15 PM

Source: 511_sfbay · ID 511.org/1544469 First seen Sep 2, 2026 8:15 PM