Northville Township police said it is unclear why a 53-year-old Plymouth man rear-ended a semi-tractor trailer on Five Mile Road Thursday morning.
The man, who was driving a Pontiac Montana minivan, was headed west on Five Mile at Pilot Drive, according to Sgt. Matt Mayes. The accident ocurred around 5:30 a.m. when the minivan hit the semi, which was waiting to make a left turn.
The driver of the minivan was taken by helicopter to the University of Michigan Hospital and was in critical condition, according to Mayes. A passenger in the minivan suffered minor injuries and was taken to St. Mary Hospital in Livonia. The semi driver, a 40-year-old Illinois man, was not injured.
Five Mile was closed for several hours between Sheldon and Beck following the accident.
Police are still investigating the incident, Mayes said.