Accident High Severity Resolved

CHP : Disabled vehicle on CA-4 Westbound at Lone Tree Way Bypass (Antioch). On Ramp blocked. Expect delays.

A high-severity accident was reported on CA-4 W near Contra Costa on April 6, 2026 at 1:20 AM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Apr 5, 6:20 PM

Last Updated

2 months ago

Apr 5, 7:00 PM

Resolved

Apr 6, 1:15 AM

Coordinates

37.9614, -121.7428

Update History

1 observations

CHP : Disabled vehicle on CA-4 Westbound at Lone Tree Way Bypass (Antioch). On Ramp blocked. Expect delays. Apr 5, 6:30 PM

Source: 511_sfbay · ID 511.org/1477305 First seen Apr 5, 2026 6:30 PM