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SAN MATEO, San Mateo County, Calif., Nov. 9, 2026 — A semi-truck and a passenger car collided on southbound US-101 just north of Poplar Avenue on Saturday morning, November 7, according to the California Highway Patrol. At least one person suffered injuries described as minor.
The crash involved a white semi-truck and a gray Nissan Sentra. Early radio traffic from the scene indicated the truck had come to a stop on the right shoulder near Coyote Point. An ambulance was requested for an injury shortly after the crash was reported, and the CHP's initial classification of unknown injuries was later updated to minor injuries.
Emergency crews responded to the southbound lanes near Poplar Avenue, and Caltrans was also notified to assist at the scene.
Investigators continue reviewing the collision. We wish the injured a complete and speedy recovery.
Intersection Crashes in San Mateo and Across California
This truck crash happened at US-101 and Poplar Avenue in San Mateo, CA. Readers following crash news in San Mateo County can find more about intersections across the state on our California intersection crash information.
Frequently Asked Questions
What are a truck's blind spots and why do they matter?
Large trucks have wide blind spots along both sides, behind the trailer and directly in front of the cab. Drivers in these zones may not be visible to the truck driver, which raises the risk of a collision during lane changes or turns.
What is an underride crash?
An underride crash happens when a smaller vehicle slides partly or fully beneath a truck's trailer during a collision, usually in a rear-end or side-impact situation. These crashes can cause serious damage because the trailer strikes the car well above its bumper line.
What are common causes of large-truck accidents?
Factors frequently cited in truck crashes include driver fatigue, following too closely, mechanical issues such as brake or tire failure, and sudden lane changes. Weather and road conditions can also play a role.
How can drivers share the road with trucks safely?
Giving trucks extra following distance, avoiding lingering beside a trailer, and signaling early before merging can help other motorists stay visible to truck drivers.
