Following the passage of the Federal Aid Highway Act of 1956, the railroad system for passengers and freight declined sharply, but the trucking industry expanded dramatically and the cost of shipping and travel fell sharply. Suburbanization became possible, with the rapid growth of easily accessible, larger, cheaper housing than was available in central cities. Tourism dramatically expanded as well, creating a demand for more service stations, motels, restaurants and visitor attractions. There was much more long-distance movement to the Sun Belt for winter vacations, or for permanent relocation, with convenient access to visits to relatives back home. In rural areas, towns and small cities off the grid lost out as shoppers followed the interstate and new factories were located near them.