High Quality Content by WIKIPEDIA articles! 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. 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. The term "West Side Highway" is often mistakenly used, particularly by the news media traffic reporters, to include the roadway north of 72nd Street which is properly known as the Henry Hudson Parkway.