where does the charlie in charliecard come from
CharlieCard The CharlieCard is named after a fictional character in a folk music song "M.T.A.", often called "Charlie on the MTA", which concerns a man trapped forever on the Boston subway system – then known as the Metropolitan Transit Authority, or MTA – because he cannot pay the 5-cent surcharge required to leave the train. Since the card's introduction, the Charlie character has been used on a variety of MBTA signs, including construction and directional signage.