A federal role may have been necessary to finance the Interstate Highway System in 1956—the year the federal fuel tax was enacted—but the system is now complete. The Federal Highway Trust Fund was established specifically as a means to finance highway construction. It is now a slush fund for Congress to fund programs aimed at appeasing special interests and financing non highway projects. The power of Congress to finance road projects was supposed to sunset in 1972 but instead continues to this day. In addition, federal regulations increase construction costs and stifle innovative policy experiments in the states.
Before the federal government took on the role of financing highways in 20th century, that role was assumed entirely by state governments and, before that, the private sector. This study makes the case that there is no longer any role for the federal government in the construction and financing of roads. Significant reform must include phasing down the federal fuel tax and giving back to the states full responsibility for highway programs.