Various states, including Rhode Island and North Carolina, are considering taxing motorists based on how many miles they drive. These proposals, understandably, have generated outrage among motorists.

News Alert: There already is a mileage tax. It’s called the gasoline tax. Motorists pay state and federal taxes on each gallon of gasoline they purchase. Gasoline usage reflects mileage driven. So the new mileage taxes really aren’t anything new, just double taxation of the same thing.