Accident
High Severity
Resolved
CHP : Traffic Hazard on I-280 Southbound exiting at Alpine Rd (Menlo Park). Off Ramp affected. Expect delays.
A high-severity accident was reported on I-280 S near San Mateo on April 20, 2026 at 3:57 AM.
Last Updated
1 month, 3 weeks ago
Apr 19, 10:15 PM
Coordinates
37.4076, -122.1904
Update History
3 observations
CHP : Traffic Hazard on I-280 Southbound exiting at Alpine Rd (Menlo Park). Off Ramp affected. Expect delays.
Apr 19, 9:45 PM
CHP : Traffic Hazard on I-280 Southbound exiting at Alpine Rd (Menlo Park). Off Ramp affected. Expect delays.
Apr 19, 9:15 PM
CHP : Traffic Hazard on I-280 Southbound at Alpine Rd (Menlo Park). Off Ramp blocked. Expect delays.
Apr 19, 9:00 PM
Source: 511_sfbay · ID 511.org/1483491
First seen Apr 19, 2026 9:00 PM