A California Highway Patrol motorcycle officer was severely injured in a crash with a Tesla sedan on southbound Interstate Highway 280 on the Peninsula on Monday, authorities said.

The crash happened just south of the Alpine Road exit near Portola Valley at about 1:40 p.m. 

The CHP said a report of a leaf blower on the roadway prompted the officer to respond to the location and initiate a traffic break. While conducting the traffic break with emergency lights flashing, a 2026 Tesla Model Y failed to yield to the officer and collided with the motorcycle, the CHP said.

The officer was ejected from the motorcycle and sustained major injuries that were not life-threatening, the CHP said. The officer, who was not identified, was being treated at a local hospital.

The driver of the Tesla remained on the scene and was cooperating with the investigation, the CHP said. It was not immediately determined whether the Tesla was being driven with the vehicle's Autopilot driver assistance system.

The three left lanes of southbound 280 were closed during the investigation, leaving just the No. 4 lane available. Drivers were advised of significant traffic delays for several hours.   

Caltrans said all lanes were open as of 8:30 p.m.