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Below are the the states we have Massachusetts Bay Transportation Authority radio scanner frequencies for:
The Massachusetts Bay Transportation Authority is the public agency responsible for operating most public transportation services in Greater Boston, Massachusetts. Earlier modes of public transportation in Boston were independently owned and operated; many were first folded into a single agency with the formation of the Metropolitan Transit Authority (MTA) in 1947. The MTA was replaced in 1964 with the present-day MBTA, which was established as an individual department within the Commonwealth of Massachusetts before becoming a division of the Massachusetts Department of Transportation (MassDOT) in 2009. The MBTA and Philadelphia's Southeastern Pennsylvania Transportation Authority (SEPTA) are the only U.S. transit agencies that operate all five major types of terrestrial mass transit vehicles light rail vehicles (the Ashmont–Mattapan High Speed and Green Lines); heavy rail trains (the Blue, Orange, and Red Lines); regional rail trains (the Commuter Rail); electric trolleybuses (the Silver Line); and motor buses (MBTA Bus).