[Marak]

Not enforceable? What you mean is that not every speeder was caught and ticketed. There is a great difference between that and your statement.

Just how many speeding tickets do you think were issued by the states under the 55 MPH limit?

A heck of a lot more that 8-14 million.

The point being made was that the task could be accomplished through leverage. Regardless of how many speeders were caught or not caught, the states changed their laws. That eliminates the barrier of state laws that you specified.

As for the state and local agencies actually enforcing those new laws, pressure can be brought on a local level. It can be done. The real questions is do we want to do it.

[Texasforever]

Right and there have been a hell of a lot of illegal aliens deported too. Just like speeding though, they just keep coming back. You have picked the worst analogy imaginable to try to make your case. In fact you keep making my argument for me. Try to do better.