Earlier quoted context omitted.
The thing is that 50% (even more) of the population should not be allowed to drive to begin with and we shouldn't wait for any technology to be ready to remove them from the road. That is the real elephant in the room that nobody wants to mention, especially political representatives who would be afraid to lose votes.
Let's not look a gift horse in the mouth though? Petty little things like political ramifications have a funny way of not being so petty,by definition 51% of people in a democracy can decide they will not be stopped from driving.
I am pretty sure among those 51% of people only a fraction is made up of total assholes that wouldn't change the way they drive if rules were more strict while another fraction could accept more and more stringent laws, especially if they come gradually and would increase their standards of driving to keep that privilege.