Accident High Severity Resolved

CHP : Traffic Collision on US-101 Southbound entering at E Hillsdale Blvd (San Mateo). On Ramp affected. Expect delays.

A high-severity accident was reported on US-101 S near San Mateo on May 26, 2026 at 11:32 PM.

Road

US-101 S

Area

San Mateo

Address

Loading…

Started

May 26, 4:32 PM

Last Updated

23 hours, 56 minutes ago

May 26, 5:45 PM

Resolved

May 27, 12:00 AM

Coordinates

37.5428, -122.2864

Update History

2 observations

CHP : Traffic Collision on US-101 Southbound entering at E Hillsdale Blvd (San Mateo). On Ramp affected. Expect delays. May 26, 5:45 PM

CHP : Traffic Collision on US-101 Southbound entering at E Hillsdale Blvd (San Mateo). On Ramp affected. Expect delays. May 26, 5:30 PM

Source: 511_sfbay · ID 511.org/1499639 First seen May 26, 2026 5:30 PM