A 53-year-old Alliston man sustained serious injuries during a car crash south of Primrose Saturday.
The crash happened on Highway 10, south of the 25th Sideroad.
The four-vehicle collision involved a transport truck and three vehicles.
The Alliston man, who was driving a Volkswagen Golf, was taken to Sunnybrook Health Sciences Centre in Toronto by air ambulance.
The road was closed for several hours. The investigation is ongoing.