I've done the drive many times too....however it is a disgrace that the stretch between Winnipeg and Sault Ste. Marie is mostly two-lane, rather than twinned into a four-laner. I realize that the geography of the area would involve some serious money - but it is, after all, the 21st century. Whenever a tractor-trailer or another vehicle has an accident, that highway is closed - sometimes for a day or so, until the mess is cleaned up or the investigation is completed....and there's NO way around. You're stuck. Period. Addition of another lane is becoming critical.
That highway is the TransCanada, and to be relegated to what is basically a cow-path at times is an affront to the residents of the area and Canadian travelers.