The Black And White Street Era In Morrisville. On Sunday, May 6, 2018, Norfolk Southern GP38-2 5640 (née-PC 7939, EMD, GP38, 4/1971) leads Conrail Shared Assets job YPMOR-1 north up South Delmorr Avenue through the street in Morrisville, Pennsylvania on the way to the yard with a sting of empties from A.E. Staley under the Northeast Corridor Line (NEC). At this time, paired Norfolk Southern units were the standard power. Within a few years, PTC would be required to operate on the NEC, and with NS selecting a different system from CSX for their Conrail assigned units, these units would be gone from jobs that involved crossing or operating on Amtrak trackage within a few years.