Huh. Good to know. The highway linking Montreal to Toronto is the 401, and the posted speed limit is 100 Kph (62 mph). "Most" traffic move along at 115-120 (72-75 mph), and frequently you come across "trains" of cars moving at 130-140 (82-88 mph) on the theory that only one of then will get pulled over if a police car catches up with them. Of course, the OPP (Ontario Provincial Police) know about this tactic, and from time to time set up traps with 1 radar gun, one officer on the road, and a squad of cars on the side pulling over everyone who exceeds the limit. The safe "fast" speed is 118 (74mph). Above that, you're fair game.
I have, on a few occasions, been passed by someone going easily 160 kph (100 mph), flashing their lights at everyone in their path (pretty much everyone, therefore), and braking suddenly if the flashee did not want to move over. Eh. Darwin will take care of them sooner or later, but hopefully not taking any innocent lives with them at the same time.
And then... you get the sweet lady or gentleman who feels anything above the posted minimum (60 kph/38 mph) is just unsave. When there's a long line of traffic for no apparent reason, one of these is at the head of the line.