How are fuel (road usage) taxes calculated for people who drive electric cars?

Question

"State makes big fuss over local couple's vegetable oil car fuel", March 1, 2007

http://www.herald-review.com/articles/2007/03/01/news/local_news/1021491.txt

Answer 1

They aren't.  It's not a problem right now because there are essentially no electric cars.  But cars that run on untaxed fuel are another thing altogether: people used to run diesel trucks on furnace oil (and they probably still do) and that's a fine way to get into trouble with the local authorities.  

But someone has to pay for the roads, and there's nobody more suitable than the people who use them.  If electric cars ever become practical, the states will have to figure out a way to determine how much each one drives and levy an assessment on each one accordingly.

Answer 2

in the usa not a problem...the only taxs r on fuel....[except for big trucks]

Answer 3

They aren't but as someone else pointed out since there are so few electric cars the states aren't really worried about it yet. There are already rumblings however in my state to move towards a mileage based system for charging road taxes. They would check the miles driven at inspections or while gassing up or something.

Edit: Pedro that is exactly the problem. Electric and grease powered cars aren't paying for the roads they are using.