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Penn Central Transportation Company
The Penn Central Transportation Company was an American railroad formed in 1968 by merging the Pennsylvania and New York Central railroads; it went bankrupt in 1970.
Pennsylvania Railroad
The Pennsylvania Railroad, known as the PRR, was an American railroad chartered in 1846 that grew into the country's largest and merged into Penn Central in 1968.
Pennsylvania Railroad class S1
The Pennsylvania Railroad class S1, nicknamed the Big Engine, was a single experimental 6-4-4-6 duplex steam locomotive built in 1939, the longest and heaviest rigid-frame passenger locomotive ever built.
Pennsylvania Railroad locomotive classification
The Pennsylvania Railroad (PRR) classified its locomotives with letter-and-number codes instead of builders' names: steam and electric codes encoded wheel arrangement, as in K4s and GG1, while the 1947 diesel scheme encoded the builder.
Pennsylvania Station (1910–1963)
Pennsylvania Station, known as Old Penn Station, was a Beaux-Arts Manhattan terminal by McKim, Mead & White, opened in 1910 and demolished from 1963 for Madison Square Garden.
People mover
A people mover, or automated people mover, is a driverless transit system of small vehicles on a fixed guideway, used mainly at airports and amusement parks.
Percy William Pilcher
Percy William Pilcher, usually recorded as Percy Sinclair Pilcher, was a British engineer who flew hang gliders in the 1890s and set a world gliding distance record of 250 m.
Pere Marquette 1225
Pere Marquette 1225 is a preserved 1941 Berkshire steam locomotive in Owosso, Michigan, known as the prototype for the train in the 2004 film The Polar Express.
Pershing locomotive
The Pershing locomotive, or Pershing class, was a 2-8-0 steam locomotive built by Baldwin from 1917 to 1919 for American forces in France during World War I.
Pesa
Pesa is a Polish manufacturer of rail vehicles headquartered in Bydgoszcz, the largest in Poland, tracing its origins to railway repair workshops opened there in 1851.
Philadelphia Main Line
The Philadelphia Main Line is a string of affluent suburban communities northwest of Philadelphia that grew up around Pennsylvania Railroad stations from Overbrook to Paoli, starting in the 1870s.
Philippine National Railways
The Philippine National Railways (PNR) is the state-owned railway operator of the Philippines, created in 1964, which suspended Metro Manila commuter service in 2024 for North-South Commuter Railway construction.
Piccadilly line
The Piccadilly line is a deep-level line of the London Underground, running from Cockfosters to Heathrow Airport and Uxbridge. It opened in 1906 and serves 53 stations.
Pinehurst station
Pinehurst station is an elevated Link light rail station in North Seattle at NE 130th Street, opened in 2026 as Sound Transit's first infill station.
Pink Line (Delhi Metro)
The Pink Line is Line 7 of the Delhi Metro, running from Majlis Park to Shiv Vihar and forming India's first fully operational ring metro line.
Pioneer Zephyr
The Pioneer Zephyr, also known as the Burlington Zephyr, was the first diesel-powered, stainless-steel streamlined train in the United States, built for the Burlington Railroad in 1934.
Pittsburgh Light Rail
The Pittsburgh Light Rail, branded the T, is a 26-mile light rail system serving Pittsburgh and its southern suburbs, run by Pittsburgh Regional Transit on the Red, Blue, and Silver lines.
PKP class EU07
The PKP class EU07 is a Polish four-axle universal electric locomotive built under English Electric license at Pafawag and H. Cegielski from 1965 to 1992.
PKP Intercity
PKP Intercity is the national long-distance passenger rail operator of Poland, part of the state-owned PKP Group, running commercial Express InterCity and EuroNight trains and carrying 89 million passengers in 2025.
Planet (locomotive)
Planet was an 1830 2-2-0 steam locomotive built by Robert Stephenson & Co. for the Liverpool and Manchester Railway, the first with horizontal inside cylinders, the standard locomotive layout.
Platform screen doors
Platform screen doors (PSDs) are powered barriers along a platform edge that open and close with train doors, installed chiefly to prevent falls and entries onto the track.
Polar Bear Express
The Polar Bear Express is an Ontario Northland passenger train running 299 kilometers between Cochrane and Moosonee, Ontario, carrying passengers and supplies to the James Bay coast since 1964.
Polish State Railways
Polish State Railways (Polskie Koleje Państwowe, PKP) is the Polish state railway enterprise, established in 1926 by decree, operating as the parent company of the PKP Group.
Portland Streetcar
The Portland Streetcar is a streetcar system serving central Portland, Oregon, owned by the city and opened in 2001 as the first modern-era streetcar system in the United States.
Positive train control
Positive train control (PTC) is a communications-based rail safety system, mandated by the Rail Safety Improvement Act of 2008, that automatically slows or stops trains not operated safely.
Potters Bar rail accidents
The Potters Bar rail accidents, known as the Potters Bar crash, were railway accidents at Potters Bar station in Hertfordshire, England, including a deadly 1946 collision and 2002 derailment.
Precision Scheduled Railroading
Precision Scheduled Railroading (PSR) is a freight railroad operating model developed by Hunter Harrison, first applied at Illinois Central, that manages freight at the carload level.
Preservation and restoration of railway vehicles
Preservation and restoration of railway vehicles is the practice of keeping historic trains and carriages, balancing operational use against static display under the Riga Charter.
Preservation of private railroad cars
Preservation of private railroad cars is the practice of saving, restoring, and operating privately owned passenger railcars called "private varnish", many restored vintage Pullman cars attached to Amtrak trains.
Preserved British Rail diesel locomotives
Preserved British Rail diesel locomotives are more than 250 former BR main-line diesels kept on heritage railways, in museums, and on the national network by preservation groups.