Danger Lights (one of my all time favorite railroad movies) and The Silver Streak made the list I see.
Here are the three that I think should have made the list but didn't
The Signal Tower (1924):
The Phantom Express (1932):
Westbound Limited (1937):
http://www.train-video.com/rvp71d.html
I've only ever been able to get this one from Walt Berko at Railroad Video Productions (yes, he is still around, he just outsourced the distribution to Anchor Videos).
Regards,