This one was a bit tough, but a lot of fun, the third panel in particular. I inked the train and the silhouette, being sure that the two had whitespace between them. I filled in the silhouette with my brush, then I colored the train (again leaving whitespace). On top of that, I threw a layer of dark and faded the edges with the eraser tool. Finally, I threw a gradient on top of it all, starting at solid white and fading in opacity, not color, which gave the oversaturation of the headlamps. Lots of fun.