Accident Moderate Severity Stale

CHP : Traffic Hazard on CA-4 Westbound entering at Lone Tree Way Bypass (Antioch). Right lane affected. Expect delays.

A injury accident was reported on CA-4 W near Contra Costa on November 5, 2026 at 9:30 PM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Nov 5, 1:30 PM

Last Updated

1 hour, 6 minutes ago

Nov 5, 2:00 PM

Coordinates

37.9554, -121.7444

Update History

1 observations

CHP : Traffic Hazard on CA-4 Westbound entering at Lone Tree Way Bypass (Antioch). Right lane affected. Expect delays. Nov 5, 1:45 PM

Source: 511_sfbay · ID 511.org/1573491 First seen Nov 5, 2026 1:45 PM