Tote that barge

This is actually a good idea: Oregon launches program to tax drivers by the mile

Except that it should be a strict liability crime for any government official to have any data that identifies any individual driver. You don't really need GPS for this, you just need tolls, and these days those are cheap devices.

And, needless to say, the money can be spent only on the roads where it is collected.

But of course none of those things will happen. In fact, not only will they collect GPS data for individuals, they'll have an additional non-use tax if you're not driving enough. 

Happy Fourth of July!