Members of the Stormont, Dundas and Glengarry (SD&G) Ontario Provincial Police (OPP) responded to the scene in the eastbound lanes around 7 a.m. on Thursday, October 21.
The initial investigation shows an eastbound passenger vehicle left the roadway, for reasons unknown at this time, and rolled over in the ditch.
The driver was pronounced dead at the scene and their name is being withheld pending notification of family.
One eastbound lane and the highway off- ramp are closed at mile marker 738 for the collision investigation and the reopening time is unknown.
Motorists are asked to slow down in the area.
#SDGOPP members are currently at the scene of a single vehicle fatal crash #hwy401 E/B. One driver is deceased. Lane& ramp closure in place- MM738 - Iroquois @SouthDundasLIVE. Collison investigators attending. - re-opening time unknown. Slow down in the area.@ONtransport ^tc pic.twitter.com/336XpMDRzL— OPP East Region (@OPP_ER) October 21, 2021