Accident
High Severity
Stale
CHP : Severe traffic alert and Traffic Collision and Overturned vehicle on US-101 Northbound south of CA-92 W (San Mateo). Left and center lanes blocked. Expect delays.
A high-severity accident was reported on US-101 N near San Mateo on October 27, 2026 at 2:38 PM.
Last Updated
54 minutes ago
Oct 27, 9:45 AM
Coordinates
37.5498, -122.2926
Update History
4 observations
CHP : Severe traffic alert and Traffic Collision and Overturned vehicle on US-101 Northbound south of CA-92 W (San Mateo). Left and center lanes blocked. Expect delays.
Oct 27, 9:45 AM
CHP : Severe traffic alert and Traffic Collision and Overturned vehicle on US-101 Northbound south of CA-92 W (San Mateo). Left and center lanes blocked. Expect delays.
Oct 27, 9:00 AM
CHP : Severe traffic alert and Traffic Collision and Overturned vehicle on US-101 Northbound south of CA-92 W (San Mateo). Left and center lanes blocked. Expect delays.
Oct 27, 8:00 AM
CHP : Traffic Collision with Injuries and Overturned vehicle on US-101 Northbound at CA-92 W (San Mateo). Left lane blocked. Expect delays.
Oct 27, 7:45 AM
Source: 511_sfbay · ID 511.org/1569160
First seen Oct 27, 2026 7:45 AM