Old Trams (WWII Era) in the Winter in Boston - Ashmont-Mattapan High Speed Line

The rolling stock of the Ashmont--Mattapan Line consists of rebuilt PCC streetcars that formerly ran on the Green Line. A similar streetcar can be seen in a side tunnel at Boylston station on the Green Line.
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Similar tram model but in PHILADELPHIA!    • Heritage Trams in Philadelphia - PCC ...  
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The Ashmont--Mattapan High Speed Line or also known as the "M-Line" in Boston and Milton, Massachusetts is considered to be part of the MBTA's Red Line, even though it uses different equipment (streetcars) and passengers have to change at Ashmont. The only MBTA line to run through a cemetery, the line opened on August 26, 1929. The term 'high speed line' is vestigial, as the route is neither characterized by a fully dedicated, grade separated right-of-way, nor by high-speed rolling stock.