The overall picture is just a little out of focus. Conceptually its a good shot though. I would've like to seen a little more room on the left side of the train. The crop is just a little too tight.
Nice subject... tried one similar to this, but didn't like the way mine turned out. Personally, this seems a bit over-sharpened, and the colors a bit over-saturated... to the point of becoming the focus of the shot, rather than the intended subject.