Major Collision Blocks Lanes on US-101

Traffic Collision on US Highway 101 in San Mateo Causes Lane Blockage Today

📍 San Mateo, CA

📅 Published: July 29, 2025 at 01:01 AM

🔄 Updated: July 29, 2025 at 02:02 AM

Map showing the location of the accident in San Mateo, CA
San Mateo, July 29, 2025 -

A significant traffic collision occurred today on the southbound lanes of US Highway 101 (US-101) at the 3rd Avenue off-ramp in San Mateo, CA. The incident involved four vehicles, including a grey Toyota Matrix, a white sedan, and a black SUV, all of which were rendered not drivable. The collision resulted in blocked lanes at the off-ramp, causing notable traffic delays for motorists during the early morning hours.

Emergency services quickly responded to the scene, focusing on managing traffic flow and clearing the wreckage. At one point, one of the vehicles was reported to be obstructing the off-ramp lane, contributing to congestion in the area. By approximately 1:42 AM, all lanes were confirmed clear, allowing traffic to resume its normal flow.

Motorists traveling through this area should remain cautious and be aware of potential residual delays as the situation is resolved. This traffic incident serves as a reminder of the importance of safe driving practices, especially during busy travel times. Authorities advise drivers to stay alert and follow any posted detours if necessary.

As the morning commute continues, it is essential for drivers to remain patient and vigilant on the roadways. The traffic collision highlights the unpredictable nature of driving conditions and the need for careful navigation.

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