It doesn't sound much like it, but I think this could well be connected to your other death dream. Trains, and pretty much any kind of transport, can often represent your journey through life - because we use them in waking life to get from one place to another, our dreams use that same symbol to signify our subconscious journey from one place to another.
Because the train crashes, and you're dying, I would say that this is a sign of upcoming changes that you may be worried about, and your dream (you) is telling you that you can get through it without anyone's help.
Obviously I know about your job now because of your other thread, but knowing that I think there are obvious connections with that and what I said in your death dream thread. If I didn't know about the job the above would still be the same, only I wouldn't know what change it applied to.
