The federal government would have an additional $10 billion a year to spend on crucial highways if it stopped diverting federal fuel tax money to projects with no national benefits... The federal gas tax was supposed to be used to build and maintain the Interstate Highway System. Today auto and truck drivers pay federal gas taxes that are diverted to ferryboats, trails and mass transit programs... The 18.4 cents a gallon federal fuel tax should be refocused on rebuilding and modernizing vitally important Interstates... It is time to rethink and refocus the federal transportation role more on core federal purposes...