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Massachusetts Regional Transit Authority Websites Boston Area Transit Authorities: Massachusetts Bay Transportation Authority (MBTA) Metrowest Regional Transit Authority (MWRTA) Northern Massachusetts: Cape Ann Transit Authority (CATA) Lowell Regional Transit Authority (LRTA) Merrimack Valley Regional Transit Authority (MVRTA) Central Massachusetts: Montachusett Regional Transit Authority (MART) Worcester Regional Transit Authority (WRTA) Southeastern Massachusetts: Brockton Area Transit Authority (BAT)  Greater Attleboro-Taunton Regional Transit Authority (GATRA) Southeastern Regional Transit Authority (SRTA)  Cape Cod & the Islands: Cape Cod Regional Transit Authority (CCRTA) Martha’s Vineyard Transit Authority (VTA) Nantucket Regional Transit Authority (NRTA) Western Massachusetts: Berkshire Regional Transit Authority (BRTA) Franklin Regional Transit Authority (FRTA) Pioneer Valley Transit Authority (PVTA)