i think a 50cc scooter is a bad idea, imagine how many idiots would try and bring them down major freeways. I mean a vehicle that maxes out at 60km/h in a 100km/h zone? No worries so as long as your going over a CLIFF you'll be able to keep up just fine, otherwise it'd be accidents abound.
I think It would have to be something like 125cc scooters to even be remotely safe on our roads.!