As an alternative to gas taxes to find transportation, Oregon has begun to investigate using a mileage tax based on a GPS monitor:
.......As part of a transportation-related bill he has filed for the 2009 legislative session, the governor says he plans to recommend “a path to transition away from the gas tax as the central funding source for transportation.”
What that means is explained on the governor’s website:
“As Oregonians drive less and demand more fuel-efficient vehicles, it is increasingly important that the state find a new way, other than the gas tax, to finance our transportation system.”
Perhaps it could be part of a large package...taxes for excess miles, going into inner city regions, speeding etc?