Kentucky's gas tax will go up 2.1 cents per gallon beginning July 1.
That means motorists will be paying nearly 30-cents in state taxes a gallon.
When added to the federal gas tax of 18.4 cents per gallon, motorists in Kentucky pay a total tax of 48.3 cents per gallon.
The increase is automatic because Kentucky's tax is tied to the average cost of wholesale gas, which has been rising.
The money generated by the gas tax increase will go into the state's road fund.