Putting a derailed train back on the rails.
Fixing buckled train track - GIF
Rail grinder - video
Rail repair with thermite welding - GIFs
Gas-powered impact wrench for railroad work - videos, photos
Railroad multi-maintenance heavy equipment - GIF, video, photos
Locomotive sandbox spraying sand on rails for traction - GIF
wartime railway and train sabotage techniques
Richard Feynman explains: What keeps a train on the track?