Most people I know will time their trip to pass through Montreal in the very late evening or early morning. Between 11Pm and 5AM if you can time it.
In 2009 we were heading east through Montreal in our class C at about 11:00 PM and there was more traffic than I expected. I realized it was Friday night. We were in 2 lane area in the right hand lane when a Volkswagon Rabbit comes flying up on the right, right past my bumper with about five feet width of lane left. There's traffic on my left and concrete on his right. It was so fast I didn't eve get to react.
Before long I was in the middle of three lanes with about a 4 second gap to the semi tanker in front. A 4dr Chevy Lumina comes past on the left, not going crazy but passing. When he gets to the rear wheels of the truck cab, the truck signals left and starts to move over. They both see each other at the last minute and the truck starts back right. The car on the other hand swerves left violently then over corrects back right. In milliseconds my brain had calculated that once the car, now sideways in the left hand lane gains traction it will pass into my lane just as I get there. I cannot understand how that driver regained control, but I'd love to meet them. That was not my closest call but that's another storey.