What would happen would be half the 17-21 yr olds would be slipping about with their R-plates down after 9pm or whatever... probably then without insurance, and that would probably rack them enough points to lose their licence on the spot too.
I don't think it would promote road safety, more like road stupidity and more people trying to subvert the system.
my thoughts exactly,,, i know i would break it like mad,, if i was under 21,, be using a stick on mostache's and the lot!!!LOL
I think it cause more harm than good,, unless a more reasonable time like 12 am to 6am,,, but even then it would kerb young one's driving to night clubs and the rest!! I'd think it would be unreasonable,,!!!