Accident Moderate Severity Resolved

CHP : Residual delays on US-101 Southbound at Lagoon Way (South San Francisco). Right shoulder affected. Expect delays.

A injury accident was reported on US-101 S near San Mateo on May 21, 2026 at 3:58 PM.

Road

US-101 S

Area

San Mateo

Address

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Started

May 21, 8:58 AM

Last Updated

5 months ago

May 21, 9:00 AM

Resolved

May 21, 3:00 PM

Coordinates

37.6888, -122.3907

Update History

2 observations

CHP : Residual delays on US-101 Southbound at Lagoon Way (South San Francisco). Right shoulder affected. Expect delays. May 21, 9:00 AM

CHP : Traffic Hazard on US-101 Southbound at Lagoon Way (South San Francisco). Lane affected. Expect delays. May 21, 8:45 AM

Source: 511_sfbay · ID 511.org/1497693 First seen May 21, 2026 8:45 AM