A dream about a moving train signifies the current journey you are on. If you feel scared or have motion sickness while in the train, it indicates that you are sorry about something, and that you have some obstacles you need to overcome soon.
To see yourself on top of a stationary train car, it means that you will make a journey with an unpleasant companion, with whom you will end up over spending and waste excessively thus hurting you financially.
If you see railroads without a train in your dream, it means that you will gain direction and happiness in an endeavor you have recently decided upon.
On the other hand, to be on a train moving smoothly along without a track, it indicates that you will be worried over an affair which could eventually benefit you later for a better life.
Seeing a freight train in your dream, it is an omen of changes which will lead to your elevation.