You see a train in your dream, the dream about train represents your life journey, conformity, methodical, orderly and sequential.
If the dream that you miss a train implies that you will missed some opportunities in your life. if you see a freight train it refers to the burdens, problems that you are hauling around, also a train is symbolic of manual labor. if you see or play with toy model train in your dream means you want more control over your life.
The dream that you see someone hit by train implies you on wrong path in your life, in some case this dream meaning you have tendency to do not worry about your work.