The Columbus Avenue Line is a public transit line in Manhattan, New York City, running mostly along Columbus Avenue, 116th Street, and Lenox Avenue from Lower Manhattan to Harlem. Originally a streetcar line, it is now the M7 bus route, operated by the New York City Transit Authority, a division of the Metropolitan Transportation Authority.

Ninth Avenue, known as Columbus Avenue between West 59th and 110th Streets, is a thoroughfare on the West Side of Manhattan in New York City, United States. Traffic runs downtown (southbound) from the Upper West Side to Chelsea. Two short sections of Ninth Avenue also exist in the Inwood neighborhood, carrying two-way traffic.