The driver of a vehicle that fatally struck a pedestrian on the E.C Row Expressway is unlikely to be charged, Windsor police say.

A Chevy Silverado pickup truck struck a pedestrian around 7 a.m. on E.C Row at the Dominion Boulevard on ramp, Staff Sgt. Dave Kigar told CBC News. 

Kigar said the driver of the truck was "distraught." 

The pedestrian, described to be in his 40's, was taken to hospital and died shortly after arriving, Kigar said. 

He said police are still trying to identify the man and do not have any indication of what he was doing on the road.

Sgt. Douglas Cowper said conditions were poor and there was no one to tell police why the man was there. 

"It was raining really heavily at the time, early this morning so nobody saw [the pedestrian], whether they were hitchhiking, walking on the road or trying to cross the road," Cowper said.

The eastbound lanes of the expressway at Dominion were blocked off by police accident reconstruction teams for several hours Sunday afternoon.