paying at gas station, won't work out that well.
only way they can tax all vehicles by mile is at inspection stations.
electrics and propane fueled don't have to stop by a gas station. not to mention the ones that fill up at home, from the 100-800 plus gallon tanks, that get fuel delivered by truck.
might be a while before the politicians figure this out. so I guess some will get to drive around with out paying taxes.
and like someone said lotta odometers gonna fail.