Accident Moderate Severity Resolved

CHP : Traffic Collision on US-101 Southbound south of E 4TH Ave (San Mateo). Lane affected. Expect delays.

A injury accident was reported on US-101 S near San Mateo on October 18, 2026 at 7:39 AM.

Road

US-101 S

Area

San Mateo

Address

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Started

Oct 18, 12:39 AM

Last Updated

1 week, 2 days ago

Oct 18, 12:45 AM

Resolved

Oct 18, 7:00 AM

Coordinates

37.5682, -122.3112

Update History

1 observations

CHP : Traffic Collision on US-101 Southbound south of E 4TH Ave (San Mateo). Lane affected. Expect delays. Oct 18, 12:45 AM

Source: 511_sfbay · ID 511.org/1565315 First seen Oct 18, 2026 12:45 AM