Police are investigating why a pedestrian was on the highway after he was struck and killed by a driver of a tractor trailer near Hwy. 401 and Allen Road early Monday morning.

OPP Const. Taylor Konkle said police received a call around 1 a.m. reporting a pedestrian on the highway.

“Units started to respond to the call and then came across the body laying on the ground,” Konkle told the Star.

The driver of the tractor trailer remained at the scene. Police say no impaired driving is suspected at this time.

The coroner had reached the scene by 3 a.m., at which point the pedestrian still had not been identified.

OPP are “still trying to figure out” what the pedestrian was doing on the highway, Konkle said.

The investigation is ongoing and the roads have since reopened.