Accident High Severity Resolved

CHP : Traffic Collision on CA-4 Eastbound west of Lone Tree Way Bypass (Antioch). Right shoulder affected. Expect delays.

A high-severity accident was reported on CA-4 E near Contra Costa on July 7, 2026 at 2:09 PM.

Road

CA-4 E

Area

Contra Costa

Address

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Started

Jul 7, 7:09 AM

Last Updated

3 weeks, 4 days ago

Jul 7, 7:15 AM

Resolved

Jul 7, 1:30 PM

Coordinates

37.9648, -121.7406

Update History

2 observations

CHP : Traffic Collision on CA-4 Eastbound west of Lone Tree Way Bypass (Antioch). Right shoulder affected. Expect delays. Jul 7, 7:15 AM

CHP : Traffic Collision on CA-4 Eastbound west of Lone Tree Way Bypass (Antioch). Lane blocked. Expect delays. Jul 7, 7:00 AM

Source: 511_sfbay · ID 511.org/1517623 First seen Jul 7, 2026 7:00 AM