I may have went too far with this one. I was going for break of dawn/foggy morning sorta look. First I did a screen layer to lighten Then a Sautration adjustment layer and mask to color the train portion only. Then I decided to crop. Next I applied a Color Dodge at about 60%. Then I added a Gradient Layer on the bottom to look something like fog. Next came a gradient layer at the top to give the sky a little more color. And final I added lens flare for the lights of the train and at the horizon to mimic the sun coming up. Ohh, and some where in the mix, I cloned some stuff out.