Accident Moderate Severity Resolved

CHP : Disabled vehicle on CA-4 Westbound west of San Joaquin County Line (Byron). Left lane blocked. Expect delays.

A injury accident was reported on CA-4 W near Contra Costa on June 5, 2026 at 11:54 AM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Jun 5, 4:54 AM

Last Updated

4 days, 23 hours ago

Jun 5, 5:30 AM

Resolved

Jun 5, 11:45 AM

Coordinates

37.8914, -121.5702

Update History

1 observations

CHP : Disabled vehicle on CA-4 Westbound west of San Joaquin County Line (Byron). Left lane blocked. Expect delays. Jun 5, 5:15 AM

Source: 511_sfbay · ID 511.org/1504012 First seen Jun 5, 2026 5:15 AM