[noonespecial]

It also says:

"In the 1997 HCAS combination trucks were found, on average, to pay 90 percent of their Federal highway cost responsibility through user fees, but with changes in the fuel tax they now pay only 80 percent of their cost responsibility. The heaviest combinations, those over 80,000 pounds, pay only half of their cost responsibility."

So most trucks you see on the road pay 80-90% of their way already from a purely federal fuel-tax dollar standpoint. The gas tax is just the beginning for trucks. Now consider state licensing fees, permits, mandatory inspections, tolls that increase exponentially per axle, and what must be the ridiculous cost of compliance. Between the DMV and the DOT the papers that need filing fill a 3-ring every year, and there's a fee every other page. (I suppose the question of whether or not that money makes it back into road maintenance is bound to come up but that seems like a whole different issue.)

Seriously, put a sheep in the back of a pickup in Fresno and try to drive him to Seattle without doing anything illegal.