CityLab: "This national refusal to increase gas taxes—which have gone unchanged at the federal level since 1993—has two enormous impacts on everyday life. The first is that drivers no longer cover the cost of road and bridge maintenance, as the gas tax originally intended. UC Davis scholar Mark Delucchi recently estimated that drivers fall short in this respect by 20 to 70 cents per gallon. General taxpayers have made up the resulting budget gap in recent years, whether they drive or not."
