freight rail yard by the 1940s. Sunnyside Yard was completed in 1910 for use with Penn Station in New York City. The yard is across the East River from Penn Station in Manhattan, situated in Sunnyside, Long Island. Sunnyside yard was capable of storing over 1,000 passenger cars, occupying a roughly rectangular area long by wide; in all. Major passenger stations The Pennsy built several grand passenger stations, alone or with other railroads. These architectural marvels, whose city name was usually preceded by "Penn Station", were the hubs for the PRR's passenger service. Many are still in use today, served by Amtrak and regional passenger carriers. Heritage Units As a part of Norfolk Southern's 30th anniversary, they painted 20 new locomotives into predecessor schemes. NS #8102, a GE ES44AC, was painted into the Pennsylvania RR scheme. As a part of New Jersey Transit's 40th anniversary in 2019, three locomotives were painted into predecessor schemes. Bombardier ALP-46A #4636 was wrapped into the Pennsylvania RR scheme. See also Conrail — successor to Penn Central from 1976 Horseshoe Curve (Altoona, Pennsylvania) List of Pennsylvania Railroad lines east of Pittsburgh List of Pennsylvania Railroad lines west of Pittsburgh List of Pennsylvania Railroad passenger trains List of Pennsylvania Railroad predecessor railroads Monopoly — One of the railroads in the Atlantic City-themed version of the game is the PRR. New York Central Railroad — longtime adversary, eventual merger partner New York, New Haven and Hartford Railroad — longtime partner in run-through trains, also became part of Penn Central Norfolk Southern Railway — successor to Conrail in former PRR territory Penn Central Transportation Company — successor to the PRR and NYC in 1968 Pennsylvania Company — holding company incorporated in 1870 to own/operate lines west of Pittsburgh Pennsylvania Lines LLC — Conrail subsidiary that owned ex-PRR trackage and PRR reporting mark Pennsylvania Station — the name for several major stations Pennsylvania Railroad Freight Building Pennsylvania Railroad Office Building PRR locomotive classification Unification to standard gauge on May 31, 1886 References Notes Citations Sources Further reading External links Pennsylvania Railroad Technical and Historical Society Railroad Museum of Pennsylvania Strasburg, Pennsylvania — museum with many PRR artifacts PRR Chronology — in depth — year-by-year listing of events related to or impacting the Pennsylvania Railroad RR Picture Archives — Photos of PRR equipment Archival collections of the Pennsylvania Railroad at Hagley Museum and Library Hagley Digital Archives: Pennsylvania Railroad negatives