New York entered its third era of massive transportation projects by building highways, notably the New York State Thruway. The project was unpopular with New York City Democrats, who referred to it as "Dewey's ditch" and the "enemy of schools", because the Thruway disproportionately benefited upstate. The highway was based on the German Autobahn and was unlike anything seen at that point in the United States. It was within of 90% of the population at its conception. Costing $600 million, the full project opened in 1956.