The federal government and many states are unable to adequately maintain the nation’s transportation infrastructure in part because the gasoline taxes intended to fund infrastructure projects are often poorly designed. Thirty states and the federal government levy fixed-rate gas taxes where the tax rate does not change even when the cost of infrastructure materials rises or when drivers transition toward more fuel-efficient vehicles and pay less in gas tax. The federal government’s 18.4 cent gas tax, for example, has not increased in over twenty-three years. Likewise, more than twenty states have waited a decade or more since last raising their own gas tax rates.
