South Ferry is the southern terminal of the IRT Broadway-Seventh Avenue Line, carrying 1 service, which was supplemented by 9 service during rush hours until May 2005. The single platform is on the outside of the outer track of a two-track loop. The platform is extremely short (rear five cars cannot load or unload). Gap fillers are used to bridge the gap between the platform and the doors. Spray nozzles lubricate the track to reduce the friction caused by the tight curve. The sharp curvature slows train operation and generates excessive noise. This causes delays for the entire line. [1]