Oregon already has this in place. So now matter what we do, we are screwed. My only reason for buying a fuel efficient car would be to save money on gas. That idea is out the window if this idea catches on. Forget the environment, if I am going to be charged for the amount of miles I drive, I am going to buy the biggest, baddest gas guzzling suv or 4×4 truck and enjoy every single one of those purchased miles!