 This problem was remedied in January 1959 when gap fillers were installed.Services on the Broadway–Seventh Avenue Line, including the 1 and 9 trains (the latter of which was a rush-hour skip-stop duplicate of the former from 1989 to 2005), used the outer platform as a terminal station for more than a century since its inception, except for two relatively short periods of time.The first period was between September 2001 and September 2002 since the main branch south of Chambers Street was impassable after the September 11 attacks.