Motorists in nine states will see changes in gas taxes at the pump on New Year's Day, and more than a dozen states will examine adjustments in 2017.
Pennsylvania already has the largest gas tax in the country, at 50.4 cents per gallon, according to the Tax Foundation. The rate will rise 7.9 cents per gallon with the new year, based on a 2013 law.
The other big increase is in Michigan, where the gas tax is already 30.54 cents per gallon, according to the foundation. That rate will rise 7.3 cents per gallon, based on a 2015 law.
Nebraska's rate of 27.7 cents per gallon is going up 1.5 cents per gallon, as part of a four-step hike approved in 2015.
Georgia, North Carolina, Indiana and Florida will each see modest gas-tax increases of less than a penny per gallon, based on automatic adjustments in those states, according to the Institute on Taxation and Economic Policy.
Two states — New York and West Virginia — will have slight reductions based on automatic adjustments, according to the institute. The Empire State's rate will fall 0.8 cents per gallon and Mountain State's rate will drop 1 cent per gallon.