I think the elephant in the room is this: speed governor.
If it’s safe to take it off, go for it. If not, oh well it is what it is.
Anecdotally I’ve passed a wood-log truck in N.B. which was going 120 kph. On several occasions, I’ve also caught trucks going 106~110 (or 115? I don’t remember) kph on our 400-series freeways.
Funny enough, there’s a city in Ontario where trucks don’t have speed governors (possibly illegally so). Guess where?
Even allowing trucks to pass at 110 kph may ease things up a bit.