Accident Moderate Severity Stale

CHP : Disabled tractor trailer on CA-4 Westbound at San Joaquin County Line (Byron). Lane blocked. Expect delays.

A injury accident was reported on CA-4 W near Contra Costa on June 16, 2026 at 12:10 PM.

Road

CA-4 W

Area

Contra Costa

Address

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Started

Jun 16, 5:10 AM

Last Updated

50 minutes ago

Jun 16, 5:45 AM

Coordinates

37.8903, -121.5694

Update History

1 observations

CHP : Disabled tractor trailer on CA-4 Westbound at San Joaquin County Line (Byron). Lane blocked. Expect delays. Jun 16, 5:15 AM

Source: 511_sfbay · ID 511.org/1508858 First seen Jun 16, 2026 5:15 AM