Accident Resolved

CHP : Residual delays on CA-4 Eastbound at San Joaquin County Line (Byron). All lanes open. Expect delays.

A accident was reported on CA-4 E near Contra Costa on June 16, 2026 at 12:52 PM.

Road

CA-4 E

Area

Contra Costa

Address

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Started

Jun 16, 5:52 AM

Last Updated

1 day, 17 hours ago

Jun 16, 7:30 AM

Resolved

Jun 16, 1:30 PM

Coordinates

37.8901, -121.5691

Update History

4 observations

CHP : Residual delays on CA-4 Eastbound at San Joaquin County Line (Byron). All lanes open. Expect delays. Jun 16, 7:30 AM

CHP : Severe traffic alert and Disabled tractor trailer on CA-4 Eastbound at San Joaquin County Line (Byron). All lanes blocked. Avoid the area. Jun 16, 7:15 AM

CHP : Severe traffic alert and Disabled tractor trailer on CA-4 Eastbound at San Joaquin County Line (Byron). All lanes blocked. Avoid the area. Jun 16, 6:30 AM

CHP : Disabled tractor trailer on CA-4 Eastbound at San Joaquin County Line (Byron). All lanes blocked. Avoid the area. Jun 16, 6:00 AM

Source: 511_sfbay · ID 511.org/1508862 First seen Jun 16, 2026 6:00 AM

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