The 129th Street station was a transfer station on the IRT Third Avenue Line in Manhattan, New York City, shared by elevated trains of both the Third Avenue Line and IRT Second Avenue Line. The next stop to the north was 133rd Street for the main line and Willis Avenue for the Willis Avenue spur, both of which were across a swing bridge above the Harlem River in the Bronx. The next stop to the south was 125th Street−Third Avenue for Third Avenue Line trains and 125th Street−Second Avenue for Second Avenue Line trains.