Heading north, the eastern branch of the Park Avenue Viaduct passes through the bottom of the Helmsley Building, descending to street level and rejoining the western (southbound) lanes of Park Avenue at 46th Street.
Heading north, the eastern branch of the Park Avenue Viaduct passes through the bottom of the Helmsley Building, descending to street level and rejoining the western (southbound) lanes of Park Avenue at 46th Street.