The West Side Highway (officially the Joe DiMaggio Highway) is a mostly surface section of New York State Route 9A (NY 9A) that runs from West 72nd Street along the Hudson River to the southern tip of Manhattan in New York City. It replaced the West Side Elevated Highway, built between 1929 and 1951, which was shut down in 1973 due to neglect and lack of maintenance, and was dismantled by 1989.