Sleeping policeman

A lot of what government does is regulate behavior: under 21? can’t drink, have an infection? get a prescription before you can buy antibiotics, really mad at someone? oh no, you can’t kill them! Coming soon, per this Economist.com article is intelligent speed adaptation, technology being developed in Europe that will combine GPS with maps that include speed limit information to prevent drivers from exceeding that limit. Sure, I know, speed kills and causes more accidents and higher insurance premiums but somehow I doubt this will get too far in America, the home of the free. What do you think?