Average speeds are around 120 to 130kph on the 400 series highways, including the QEW. Outside of the cities, it is not unusual to see 140 to 160kph, especially towards London to the west and east of Newcastle (East of Toronto).
Just have to watch out for those Highway Rangers. One SVT owner claims to have seen 240kph on the 407 a couple of times during impromptu highway races.
