Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The M2 is a series of 244 electric multiple unit cars produced for the Metropolitan Transportation Authority and the Connecticut Department of Transportation for use on the New Haven Line (then part of Penn Central, now part of Metro North). Built primarily by the Budd Company in a consortium with General Electric and Canadian Vickers between 1972 and 1977, the cars were initially branded as The Cosmopolitans. Final assembly of the M2 cars using Budd bodies was completed at GE's Transportation Division in Erie, Pennsylvania.

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