How about instead of spending millions, even billions, on attempting to create highway safety via infrastructure and law enforcement we simply stop licensing drivers who have no demonstrable ability to be competent, therefore safe, behind the wheel?  Yes that means raising the standards and finding ways to test against them that do not endanger the lives of testers and the general public.  I figure if pilots can be trained via simulators, including shuttle pilots, we can test license applicants with the technology.

Think of the host of ills we can cure by taking so many drivers off the roads.