| The Pennsy had the good sense after WW 1 to design for high traffic, high density railroading, not wanting to get caught off guard should there ever be another time of great demand, and wanting to avoid another situation where the USRA took over operation of the railroads, as in the war. Thus they built a lot of multi track with flyovers, rather than at grade crossings. This proved to be marvelous foresight, as the PRR handled monumental levels of all kinds of trains during WW 2. It also had the added benefit of making them a much more efficient railroad than they would have been otherwise. A pair of SD40-2s is on one of the flyovers coming off Rockville Bridge and into Enola, passing over tracks that will lead to the Middle Division. |