Former Congressman John Kasich suggests eliminating most of the federal gas tax and letting states replace it and take care of their own roads, while the feds maintain the interstates.
The main benefit of this is wiping out a lot of the pork sweepstakes that inspire so many Congressional press releases.
Another little goody he doesn't mention is that this would take the sting out of the federal mandate to keep state drinking ages up to 21, as that is currently tied to receiving federal highway dollars. I am assuming several states would take the opportunity to lower the drinking age back down to 18.
I think if we could do this in conjunction with a required significant loss of driving privileges for first time drunk drivers I would be okay with it.