Accident
High Severity
Stale
CHP : Severe traffic alert and Traffic Collision with Injuries and Overturned vehicle on I-280 Northbound south of Sand Hill Rd (Menlo Park). Left and center lanes blocked. Expect delays.
A high-severity accident was reported on I-280 N near San Mateo on April 23, 2026 at 1:33 AM.
Last Updated
31 minutes ago
Apr 22, 7:30 PM
Coordinates
37.4173, -122.2124
Update History
4 observations
CHP : Severe traffic alert and Traffic Collision with Injuries and Overturned vehicle on I-280 Northbound south of Sand Hill Rd (Menlo Park). Left and center lanes blocked. Expect delays.
Apr 22, 7:30 PM
CHP : Severe traffic alert and Traffic Collision with Injuries and Overturned vehicle on I-280 Northbound south of Sand Hill Rd (Menlo Park). Left and center lanes blocked. Expect delays.
Apr 22, 7:15 PM
CHP : Severe traffic alert and Traffic Collision with Injuries and Overturned vehicle on I-280 Northbound south of Sand Hill Rd (Menlo Park). Left and center lanes blocked. Expect delays.
Apr 22, 7:00 PM
CHP : Traffic Collision with Injuries and Overturned vehicle on I-280 Northbound south of Sand Hill Rd (Menlo Park). Left and center lanes blocked. Expect delays.
Apr 22, 6:45 PM
Source: 511_sfbay · ID 511.org/1484889
First seen Apr 22, 2026 6:45 PM