Highway spending is a major factor in propelling the Wisconsin gas towards the top of the charts. You want more and bigger roads in Wisconsin, you pay for them at the pump.
Gas today is as low as $3.61 per gallon in Iowa. and $3.76 in Minnesota. The tax is lower in 39 other states.
Check the Tax Foundation chart below for state-by-state gas tax levels.
All those are in addition to the federal gas tax, which has been 18.4 cents since 1993.