Heh...very cool. Back when I was, on, I dunno, end of elementary school or early junior high school, my dad and I built a really cool model railroad, it was "N-Scale". The whole plaster mountain, tunnel, village, some houses lit up, trees, controllable switches and a high end speed control with a super slow creep function.
Near the end (25:00) he pulls into a big switch yard and ends in a terminal which would be larger than most hobbyists whole layout. The place must be huge.