U.S. Route 9 (US 9) is a part of the United States Numbered Highway System that runs from Laurel, Delaware, to Champlain, New York. In New York, US 9 extends 324.72 miles (522.59 km) from the George Washington Bridge in Manhattan to an interchange with Interstate 87 (I-87) just south of the Canadian border in the town of Champlain. US 9 is the longest north–south U.S. Highway in New York. The portion of US 9 in New York accounts for more than half of the highway's total length.

Broadway is a road in the U.S. state of New York. Broadway runs from the south at State Street at Bowling Green for 13 mi (20.9 km) through the borough of Manhattan, over the Broadway Bridge, and 2 mi (3.2 km) through the Bronx, exiting north from New York City to run an additional 18 mi (29.0 km) through the Westchester County municipalities of Yonkers, Hastings-On-Hudson, Dobbs Ferry, Irvington, Tarrytown, and Sleepy Hollow, after which the road continues, but is no longer called "Broadway". The latter portion of Broadway comprises a portion of U.S. Route 9.