Accident
High Severity
Resolved
CHP : Traffic Collision on I-680 Southbound north of Stone Valley Rd (Alamo). Off Ramp affected. Expect delays.
A high-severity accident was reported on I-680 S near Contra Costa on May 17, 2026 at 6:32 AM.
Last Updated
1 week, 5 days ago
May 16, 11:45 PM
Coordinates
37.8541, -122.0294
Update History
3 observations
CHP : Traffic Collision on I-680 Southbound north of Stone Valley Rd (Alamo). Off Ramp affected. Expect delays.
May 16, 11:45 PM
CHP : Traffic Collision on I-680 Southbound north of Stone Valley Rd (Alamo). Off Ramp affected. Expect delays.
May 16, 11:30 PM
CHP : Traffic Collision on I-680 Southbound north of Stone Valley Rd (Alamo). Right shoulder affected. Expect delays.
May 16, 11:15 PM
Source: 511_sfbay · ID 511.org/1495606
First seen May 16, 2026 11:15 PM