There are many readily available technical solutions to limit danger from cars and drivers. The problem is that there is zero political will to do so. I think mainly because of car manufacturers playing this on two fronts: bribing or blackmailing politicians (think what happens to economy if we don't sell faster, bigger, stupider cars!) and influencing pop culture - driving a car in irresponsible manner is still seen as cool and manly thing to do. It's cigarettes all over again and it will take a monumental effort to change it.