"M.T.A.", often called "The MTA Song", is a 1949 song by Jacqueline Steiner and Bess Lomax Hawes. Known informally as "Charlie on the MTA", the song's lyrics tell an absurd tale of a man named Charlie trapped on Boston's subway system, which was then known as the Metropolitan Transit Authority (MTA). The song was originally recorded as a mayoral campaign song for Progressive Party candidate Walter A. O'Brien. A version of the song with the candidate's name changed became a 1959 hit when recorded and released by The Kingston Trio, an American folk singing group.