I used to have loads of train dreams, but they eventually finished. Often I was waiting for a train, or stopping a train that was running, or trying to get off a moving train. Also lots of lift dreams, where they would malfunction or catch fire. I've been stuck in plenty of lifts in real life, but it's never frightened me, I think it's just a mental symbol for feeling stuck in an awkward situation in life. Similar with the trains. (None of that was my recurring nightmare, though, but that's a bit odd even for here.) Still, enough about my insanity.
I've never had a train dream. We don't use them much on the west coast of the States. I've had pen's teeth dream countless times, and the other night I dreamed I was searching for treasure in a lost tomb. I fell through a trap floor and got bit by a snake.