 This platform has an even sharper curve than the outer platform, and only the center doors opened here, with special arched openings in a wall between the platform and track at the locations of the doors.In the late 1950s, when the IRT division began to use mostly R-type cars which could not have only the center doors opened, 5 trains (which ended at South Ferry evenings and weekends only) and 6 trains (which ended at South Ferry late nights) were rerouted to the outer loop.The Bowling Green–South Ferry shuttle, which ran weekdays and at first also late nights, continued to use the inner loop, running to the west platform at Bowling Green until 1977, when the inner platform was closed and Lexington Avenue trains stopped using the outer loop.