Accident High Severity Resolved

CHP : Traffic Collision on CA-4 Eastbound exiting at G St (Antioch). Off Ramp affected. Expect delays.

A high-severity accident was reported on CA-4 E near Contra Costa on September 14, 2026 at 12:18 AM.

Road

CA-4 E

Area

Contra Costa

Address

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Started

Sep 13, 5:18 PM

Last Updated

1 month, 1 week ago

Sep 13, 5:45 PM

Resolved

Sep 14, 12:00 AM

Coordinates

37.9981, -121.8111

Update History

2 observations

CHP : Traffic Collision on CA-4 Eastbound exiting at G St (Antioch). Off Ramp affected. Expect delays. Sep 13, 5:30 PM

CHP : Traffic Collision on CA-4 Eastbound at G St (Antioch). Right lane blocked. Expect delays. Sep 13, 5:15 PM

Source: 511_sfbay · ID 511.org/1548876 First seen Sep 13, 2026 5:15 PM