A scene no other railroad can match, At Summerhill on the former PRR mainline between Pittsburgh and Altonna on the West Slope of the Alleghanies. 2 eastbounds race other running upgrade under the PRR signal bridge. The head end of an intermodal on track two is just around the bend. A couple seconds later an eastbound ethanol train races by on track one. Not captured here are the helper sets on each train running side by side under the signal bridge in what is one of the most dramatic displays I've witnessed trackside.