Accident High Severity Resolved

CHP : Traffic Collision with Injuries on I-680 Southbound at Alcosta Blvd (San Ramon). All lanes blocked. Expect delays.

A high-severity accident was reported on I-680 S near Contra Costa on July 12, 2026 at 9:43 AM.

Road

I-680 S

Area

Contra Costa

Address

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Started

Jul 12, 2:43 AM

Last Updated

3 months, 2 weeks ago

Jul 12, 2:45 AM

Resolved

Jul 12, 8:45 AM

Coordinates

37.7286, -121.9443

Update History

2 observations

CHP : Traffic Collision with Injuries on I-680 Southbound at Alcosta Blvd (San Ramon). All lanes blocked. Expect delays. Jul 12, 2:45 AM

CHP : Traffic Collision with Injuries on I-680 Southbound at Alcosta Blvd (San Ramon). All lanes blocked. Expect delays. Jul 12, 2:00 AM

Source: 511_sfbay · ID 511.org/1519949 First seen Jul 12, 2026 2:00 AM