 US 9 exits shortly after the George Washington bridge to go onto New York City's Broadway north of it, passing over the northern tip of Manhattan Island via the toll-free Broadway Bridge, through the Bronx and into Westchester County, where in some towns it follows the old Albany Post Road, which dates from the early days of the nation's existence.Following the Hudson River closely as a busy surface road through the many suburban river villages and past National Historic Landmarks such as Sunnyside and Kykuit, US 9 becomes the Croton Expressway between Croton-on-Hudson and Peekskill.That section ends at the Annsville Circle junction with US 6 and 202, where US 9 returns to two-lane status as it follows the old post road inland, away from the river.