Yeah, how are we going to read mileage? Annually? That could be a few several hundred bucks, painful for many. I see people abandoning vehicles instead of renewing their tags, or just driving illegally. Then what happens when you buy a used car with money due on it, it would be like California's in-op fees. Onboard GPS telemetry? No thank you.
I somehow imagine them making all vehicles under 6000 lbs pay the "average" gas tax of a 25 MPG vehicle, times the mileage. Unfair to the welterweights. Some states are more punitive/ regressive than others, so you'll find people "state shopping" for a better deal. Then cops will be very suspicious of out-of-state plates. It's going to get ugly.
I somehow imagine them making all vehicles under 6000 lbs pay the "average" gas tax of a 25 MPG vehicle, times the mileage. Unfair to the welterweights. Some states are more punitive/ regressive than others, so you'll find people "state shopping" for a better deal. Then cops will be very suspicious of out-of-state plates. It's going to get ugly.