>> as I entered Canada by car from the US there was a big sign informing about metric speeds
somewhere in niagara falls or after it >> Yes that's standard at all border crossings. If the km/h number was lower than its mile equivalent, I'd just let people figure it out for themselves. But the practical matter is its higher, so you'll always have the safety issue of someone trying to drive 100 miles/h on the 401. (highway) Nat
