...on hump yards
en.wikipedia.org/wiki/Classific…
...and on Conrail
american-rails.com/conrail.html
Plus a map of PA railroads...
gis.penndot.gov/BPR_PDF_FILES/…
...and a map of the NS system (with a PDF link at bottom for those who prefer)
nscorp.com/content/nscorp…
flickr.com/photos/5632/13…
multimodalways.org/docs/railroads…
multimodalways.org/docs/railroads…
...but that isn't the end of the facility.