Would a tax per mile driven be more efficient or less efficient than a tax per gallon of gasoline? Explain your answer.

Is raising the federal gasoline tax the best way to fund highways?

The 18.4 cent per gallon tax—the main source of funding for roadways—is raising too little to fix our infrastructure. Gas tax revenue has fallen because fuel-efficient cars have reduced drivers’ fuel purchases. Drivers are opposed to raising the gas tax, so would a tax on miles driven be a far better and fairer way to fund roadways?