A train runs on fixed tracks, so tradition reads it as the course others have set, or a path you share with many. Missing it is the classic version, read as fear of a chance slipping past. Being on the wrong train points to a sense that life is heading somewhere that was not your choice, while a train that will not stop is taken as momentum that is hard to break. Waiting on a platform is read as a period of transition. A smooth, comfortable journey is a gentler variant, taken as trust in the direction you are going.
When this appeared in your dream, what were you feeling?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.