sentences:  From May 2014, the bus station has been served by the adjacent St Andrew Square tram stop of Edinburgh Trams, with a direct connection to and from Edinburgh Airport.St Andrew Square bus station was opened in April 1957 by the operator Scottish Motor Traction, with 16 stances over 5 platforms and underground subways connecting the platforms.By the late 1960s, an office block had been built above the station.