Variety Night At The BET. The shop pits were full on the night of July 21, 2021 at the Massachusetts Bay Transportation Authority (MBTA) Boston Engine Terminal in Boston, Massachusetts. Peering over the roof of a GP40MC, (left to right) MBTX 1116 (GP40MC, née-CN 9499, GP40-2LW, 9/1974) sit next to MBTX 2006 (HSP46, MPI), MBTX 1059 (F40PH-2C, 9/1987) and MBTX 2000 (HSP46, MPI) are all in to be checked out or worked on by the facility's crews. The MBTA presently rosters 3 active types of locomotives for revenue service on the "Purple Line", all represented in this photo.