] He also pays a lot less in gasoline taxes which fund ] highway projects and road repairs. As more and more ] hybrids hit the road, cash-strapped states are warning of ] rough roads ahead. ] ] Officials in car-clogged California are so worried they ] may be considering a replacement for the gas tax ] altogether, replacing it with something called "tax by ] the mile." ] ] Kim and his team at Oregon State University equipped a ] test car with a global positioning device to keep track ] of its mileage. Eventually, every car would need one. Question: We're discouraging fuel efficiency. Why not just raise the damn gas tax? Answer: Because this way we get to install tracking devices in every car! You might win a debate with the cops about this but you'll never win a debate over tax revenue. CBS News | States Mull Taxing Drivers By Mile |