Cars are bigger and faster but with the same fundamental reliance on humans not to speed or be dicks as when Model T was on the road.

Fwiw, many groups are attempting to build self-driving cars it would be easy to produce cars that drove at sensible speeds as an intermediate step. That this hasn't happened says something about how a society values drivers', and drivers rights to break the law versus those of the innocents they routinely kill or maim as result.