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Observation car
An observation car is a passenger railcar placed at the rear of a train so occupants can watch the track recede, first entering standard service in 1888.
Odakyu Electric Railway
Odakyu Electric Railway (小田急電鉄) is a Japanese private railway company operating commuter and limited-express services from Shinjuku in Tokyo to Kanagawa Prefecture and the tourist destinations of Hakone and Enoshima.
Old Oak Common railway station
Old Oak Common railway station is a station under construction in west London that will serve as the London interchange for High Speed 2, opening between 2029 and 2033.
Ome Railway Park
Ome Railway Park (青梅鉄道公園), Ome, Tokyo; open-air JR East railway museum opened 1962 for the 90th anniversary of Japanese railways; 13 vehicles including a British-built 1872 No. 3 locomotive, D51, and enterable 0 series Shinkansen cab; reopened March 2026.
Open wagon
An open wagon, also called an open goods wagon, is a railway freight wagon with no roof, used to carry bulk materials and other weather-tolerant freight.
Orange Line (Lahore Metro)
The Orange Line Metro Train is a 27.1 km rapid transit line in Lahore, Pakistan, opened in October 2020 as Pakistan's first rail-based mass transit line.
Orient Express
The Orient Express was a long-distance luxury passenger train service inaugurated in 1883 by the Compagnie Internationale des Wagons-Lits, linking Paris with Constantinople (Istanbul) and running under various routes until 2009.
Orient Express (Accor)
Orient Express is a luxury travel brand owned by French hospitality group Accor, which acquired it from SNCF and extends the historic train's name to hotels, trains, and yachts.
Orient Express (rolling stock)
The rolling stock of the Orient Express is the sleeping and dining cars owned and staffed by the Compagnie Internationale des Wagons-Lits, beginning with bogie cars introduced in 1883.
Overhead line
An overhead line, also called overhead contact system or overhead line equipment, is a system of energized wires that supplies electric power to moving trains through a pantograph, from trams to high-speed lines.
Overseas Railroad
The Overseas Railroad, also known as Flagler's Folly, carried trains from Homestead across the Florida Keys to Key West, opening in 1912 and ending after the 1935 hurricane.
Oyster card
The Oyster card is a contactless smart ticket used on Transport for London services such as the Tube, buses, and trams, introduced in 2003 and holding pay as you go credit or season tickets.
Pacific Electric
Pacific Electric, also known as the Pacific Electric Railway, was a Southern California interurban railroad whose Red Cars linked Los Angeles with suburbs from 1901 to 1961.
Pacific Surfliner
The Pacific Surfliner is a state-supported intercity passenger train service operated by Amtrak along the Southern California coast from San Luis Obispo to San Diego.
Paid area
A paid area is the part of a transit station, including trains under some rules, that only fare-paying passengers may enter, separated by ticket barriers or gates.
Pakistan Railways (پاکستان ریلویز)
Pakistan Railways (پاکستان ریلویز) is the state-owned national railway of Pakistan, operating passenger and freight services under the federal Ministry of Railways; its first line opened in 1861.
Palm Springs Aerial Tramway
The Palm Springs Aerial Tramway, in Chino Canyon near Palm Springs, California, opened in 1963 and carries riders up 5,873 feet to Mount San Jacinto in about ten minutes.
Panama Canal Railway
The Panama Canal Railway is a railway line across the Isthmus of Panama linking Colón with Panama City, opened in 1855 as the first railroad to run from ocean to ocean.
Pantograph (transport)
A pantograph is a roof-mounted apparatus on an electric railway vehicle that collects traction current from the overhead contact wire, whether the train is moving or standing still.
Panvel-Karjat Railway Corridor
The Panvel-Karjat Railway Corridor is a 29.5 km double-line suburban railway linking Panvel in Navi Mumbai to Karjat, built to cut CSMT-Karjat journeys by 25 to 30 minutes.
Paris Métro
The Paris Métro, also known as the Métropolitain, is the rapid transit system serving Paris, with its first line opened in 1900 and 14 lines today.
Paris Metro Line 14
Paris Metro Line 14, known as Météor, is a fully automated driverless line of the Paris Métro that opened in 1998 and links Saint-Denis Pleyel to Orly Airport.
Paris Métro rolling stock
Paris Métro rolling stock is the train fleets operated by RATP on the Paris Métro, in steel-wheeled MF and rubber-tyred MP families, with the first MF 19 entering service in 2025.
Park Street station (MBTA)
Park Street station is a Boston subway station on the MBTA Green Line and Red Line, opened in 1897 as one of America's first two subway stations.
Parramatta Light Rail
The Parramatta Light Rail, also called the Westmead and Carlingford Line, is a light rail line in Sydney, Australia, running 12 kilometers from Westmead to Carlingford via the Parramatta CBD, opened in December 2024.
Pascack Valley Line
The Pascack Valley Line is an NJ Transit commuter rail line from Spring Valley, New York, to Hoboken Terminal via Hackensack, operated under contract with Metro-North Railroad.
Patentee (locomotive)
The Patentee was a 2-2-2 steam locomotive type designed by Robert Stephenson and Company and patented in 1833 as an enlargement of the Planet design.
PATH (rail system)
PATH (Port Authority Trans-Hudson) is a rapid transit rail system operated by the Port Authority of New York and New Jersey, linking Manhattan with Newark, Jersey City, and Hoboken.
Peacekeeper Rail Garrison
The Peacekeeper Rail Garrison was a US Air Force plan of the late 1980s to base 50 Peacekeeper intercontinental ballistic missiles on 25 trains, terminated in 1991 before deployment.
Pendolino
Pendolino is a family of tilting high-speed electric trains developed by Fiat Ferroviaria and now built by Alstom, running in over 400 trainsets across 14 countries.