Seems they do!
http://www.transitpolice.us/Special%20O ... 20Unit.htm
More Specifically here:
http://www.transitpolice.us/Special%20Operations.htm
"The MBTA Transit Police Department's Special Operations Team (SOT) was established in 1999 to deal with situations within the MBTA system which require specialized equipment, techniques and training. The Special Operations Team is responsible for the tactical support of patrol operations during hazardous incidents or preplanned raids................"
Also
"SOT Officers receive specialized training from several sources including the Federal Bureau of Investigation (F.B.I.) and joint training with other area Special Operations Teams. Officer training scenarios are conducted on-board buses, on boats, on trains within tunnels, on
elevated railways, and in stations. SOT conducts training on a regular basis to maintain a high level of proficiency. "
Sorry, but umm, where specifically are the Elevated railways on the MBTA? sides Charles/MGH (which really dont count)