You are very, very wrong, because not only are you not accounting for state fuel taxes, but toll roads, AND, the extra fees paid by truckers and other commercial vehicles. However I am not goint to write a dissertation for your sole benefit - suffice it to say, that each 18 wheeler you see, is a source of over $25K per year in taxes. Yes, over $2000 per month.
18 wheeler's do significantly more damage than cars or bridges to road surfaces. I could go into it, but I don't think you want to hear that the average 18 wheeler does more than 2k a month in damage to road surfaces. (It's vary weight and speed dependent, but when you look at the average it's well over 2k a month. http://archive.gao.gov/f0302/109884.pdf basically road damage from one 18-wheeler is equivalent to 9600 cars.)
Anyway, I responded to someone making a very specific claim about federal spending so I responded to that, state spending is a far more complex issue so here are some numbers:
Do you really think Alaska magically get's by on 8 cents a gallon or are the diverting funds for somewhere else to pay for roads? They don't have a sales tax so the math is easy on that one.
But, now let's look at Wyoming it has a nice 4% general tax on everything and charges 14 cents a gallon for gas. Let's say gas is around 3.25 a gallon before taxes and at 4% would wait for it be 13 cents. Do you think that single extra cent is going to pay to maintain all their roads? Because if the tax was 12 cents a gallon clearly they would be subsidizing that relative to you buying say cheeseburgers and they don't exactly have a lot of toll roads. Then again, if they spent close to the same percentage on road maintenance as people did on gas then the numbers would work out just fine. But wait for it, they don't.
