The movie Flashback with Dennis Hopper and Keifer Sutherland, and of course Throw Momma From the Train!  Poor old Momma, that was a mean looking little old lady.
 
What happened to Extreme Trains?  It wasn't the best, but it was pretty good and had alot of info on modern operations.
 
Modern Marvels had a rail episode with the huge BNSF yard featured.
 
There is a show I just found called Trains and Locmotives which is on a weird little channel called RFD.  It mostly seems like a public access channel for farmers. The Trains and Locomotives show had some great transition era footage though, and the sound on much of it was impressive.  That channel also has a vintage farm tractor show too.  Aside from their beautiful restorations, those old guys should not be on TV.