Harvard is a rapid transit and bus transfer station on the MBTA Red Line, located at Harvard Square in Cambridge, Massachusetts. The third-busiest MBTA subway station, Harvard averaged 23,199 entries each weekday in 2013, with only Downtown Crossing and South Station handling more passengers. It is also an important transfer point, with subway, bus, and trackless trolley (trolleybus) service all connecting at the station. Five of the fifteen key MBTA bus routes (with possible extended late-night service) stop at the station.