Accident Moderate Severity Stale

CHP : Traffic Hazard on I-680 Northbound south of Stone Valley Rd (Alamo). Left lanes blocked. Expect delays.

A injury accident was reported on I-680 N near Contra Costa on August 29, 2026 at 1:22 AM.

Road

I-680 N

Area

Contra Costa

Address

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Started

Aug 28, 6:22 PM

Last Updated

43 minutes ago

Aug 28, 7:15 PM

Coordinates

37.8480, -122.0276

Update History

2 observations

CHP : Traffic Hazard on I-680 Northbound south of Stone Valley Rd (Alamo). Left lanes blocked. Expect delays. Aug 28, 7:00 PM

CHP : Traffic Hazard on I-680 Northbound south of Stone Valley Rd (Alamo). Left lanes blocked. Expect delays. Aug 28, 6:30 PM

Source: 511_sfbay · ID 511.org/1542283 First seen Aug 28, 2026 6:30 PM