 US 9 is the longest north–south U.S. Highway in New York; additionally, the portion of US 9 in New York accounts for more than half of the highway's total length.The highway's passage through the state offers a diverse sample of New York to a traveler, passing through busy urban neighborhoods, suburban strips, and forested wilderness.It is Broadway in Upper Manhattan, the Bronx and much of Westchester County, and uses parts of the old Albany Post Road in the Hudson Valley, where it passes the historic homes of a U.S. President (Franklin Delano Roosevelt) and Gilded Age heir.