The double crossover does not have to be there. Is there any reason why there can't be an open window in that wall above the crossover? The wall doesn't exist yet, so this would be a location for viewing.
In western Pennsylvania you wou;d have slow-moving iron ore unit trains running between Lake Erie and the steel mills in Pittsburgh.Also coal/cole for the furnaces. The Pittsburgh and Lake Erie operations would be a starting point. You also have the NYC and PRR to study.
There isn't a reason why there cant be a window there, other than my wife possibly not wanting one there. I will have to propose that to her and get her feedback. Good Idea!
We currently live in western Pa. where my wife is from, however I spent most summers in eastern Pa. with coal all around. There was a train that went behind my Uncles house and we would "walk the tracks" with my Aunt and pick up pieces of coal that fell off the trains. We would have a bucket and bring them back to the house for the coal bin. We did this all summer and it was amazing at the pile we had by labor day. I haven't a clue what railroad ran through there at the time 1962 ish time frame. Being from New York City we took passenger trains from Grand central station to upstate NY to visit my other Aunt & Uncle. Great rides and fun times. Grand Central station was bigger than life for a 10 year old and seeing the rolling hills of upstate NY and the foothills of the Adirondack mountains was awesome.
Thanks for the ideas and getting my memory active.