https://www.youtube.com/watch?v=OKfEqGY6W3g
NOVA: Why Trains Crash PREVIEW • Published on Feb 16, 2017 / 20 seconds
Follow investigators as they probe the wreckage of infamous train accidents and watch safety experts test the latest crash prevention designs.
I watched the program and felt that this documentary was well done and it covered trains world wide.
Gary: Rail-fan