Not really. Unfortunately what you mentioned describes about 90% of the martial arts movies I remember watching as a kid

. Of course the train factor sets it apart. That, and the possibility that one of the guys was a cop, will probably be the key to finding out what the movie was.
I do remember when channel 56 would show these movies on Saturday afternoons (sometimes before or after a CDF-type movie). I also remember channel 27 playing these late at night in the early 90s.