Collision on US 101 Causes Traffic Delays

Traffic Collision on U.S. Highway 101 in San Mateo Causes Delays Today

📍 San Mateo, CA

📅 Published: September 18, 2025 at 05:05 PM

Map showing the location of the accident in San Mateo, CA
San Mateo, September 18, 2025 -

A traffic collision involving two vehicles occurred today on the southbound lanes of U.S. Highway 101 (US 101) at the State Route 92 East interchange in San Mateo, CA. The incident was reported at approximately 3:52 PM, initially blocking the slow lane and causing notable traffic delays for drivers in the area.

Emergency response units arrived quickly to manage the situation and clear the roadway. The vehicles involved were a Toyota Tacoma and a Porsche, both of which were either moved or scheduled for towing. By around 4:00 PM, the slow lane was reopened after the vehicles were repositioned, allowing traffic to resume its normal flow.

During the incident, motorists experienced congestion as emergency crews worked to clear the scene. Fortunately, the quick response helped minimize the disruption, and by 4:10 PM, all lanes were confirmed open, alleviating the traffic backup that had formed during the afternoon rush.

Drivers are encouraged to remain cautious and attentive in the vicinity of traffic incidents, as conditions can change rapidly. For those traveling through San Mateo, CA, it is advisable to stay updated on traffic conditions to avoid potential delays.

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