Transportation
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- Oak–VGH stationOak–VGH is a planned underground station for the Millennium Line of Metro Vancouver's SkyT
- OakumTarred fiber
- OarImplement used for water-borne propulsion
- Ocean linerType of passenger ship
- Odonymy in FranceStudy of road names in France
- Off-road vehicleAutomotive vehicle capable of driving across difficult terrain beyond sealed roads
- Off-roadingActivity of driving on unsurfaced roads or tracks
- Offshore wind portPort facility used to support construction and operation of an offshore wind project
- Ohio Department of TransportationTransportation agency of the U.S. state of Ohio
- Oil tankerShip that carries petroleum
- Oklahoma Department of TransportationState government agency in Oklahoma
- Oklahoma Turnpike AuthorityThe Oklahoma Turnpike Authority (formerly Oklahoma Transportation Authority) is an agency
- Oktogon metro stationOktogon is a station of the yellow M1 (Millennium Underground) line of the Budapest Metro.
- Old DockThe Old Dock, originally known as Thomas Steers' dock, was the world's first commercial we
- Olympia-Stadion (Berlin U-Bahn)Olympia-Stadion is a Berlin U-Bahn station on line U2, in the Westend district. It serves
- Omsk OblastFirst-level administrative division of Russia
- On-time performanceIn public transportation, schedule adherence or on-time performance refers to the level of
- One-way carsharingOne-way carsharing is a type of carsharing that enables users to begin and end their trip
- Oostplein metro stationOostplein is an underground station in the city of Rotterdam, located on the Rotterdam Met
- Opera metro station (Budapest)Opera is a station of the yellow M1 (Millennium Underground) line of the Budapest Metro. I
- Oranienburger Tor (Berlin U-Bahn)Oranienburger Tor is a Berlin U-Bahn station located on the U6. It is located 4.90 metres
- Oratório (São Paulo Metro)Oratório is a station on Line 15–Silver of the São Paulo Metro, opened on August 30, 2014.
- Order fulfillmentResponse to a customer order in terms of design, manufacture and delivery
- Order processingWork-flow to fulfil an order
- Oregon Department of TransportationDepartment of the state government of Oregon, United States
- OriandaOrianda (originally named Ragna IV, also previously known as Sabina) is an 85-foot (26 m)
- Orient ExpressLuxury passenger train service in Europe
- OrnithopterAircraft which use flapping movement of the wings to generate lift
- Örs vezér tere metro stationÖrs vezér tere is the eastern terminus of the M2 (East-West) line of the Budapest Metro. I
- OS MX3000MX3000 is an electric train used on Oslo Metro in Oslo, Norway. The multiple units are pro
- OS T1000T1000 and T1300 were two rapid transit train classes used on Oslo Metro in Oslo, Norway. T
- Osaka MetroRapid transit system in Keihanshin, Japan
- Osaka Municipal Transportation BureauOsaka Municipal Transportation Bureau (大阪市交通局, Ōsaka-shi Kōtsū-kyoku) was the public depar
- Oscar Freire (São Paulo Metro)Oscar Freire is a station on Line 4-Yellow of the São Paulo Metro operated by ViaQuatro. I
- Oskar-Helene-Heim (Berlin U-Bahn)Oskar-Helene-Heim is an U-Bahn station in Berlin, located in the southwestern Dahlem distr
- Oslo MetroRapid transit system of Oslo, Norway
- Osloer Straße (Berlin U-Bahn)Osloer Straße is a Berlin U-Bahn station in the Gesundbrunnen (former Wedding) district, l
- Otisstraße (Berlin U-Bahn)Otisstraße is a Berlin U-Bahn station located on the U6 line.
- Ottaviano – San Pietro – Musei VaticaniOttaviano–San Pietro–Musei Vaticani is a station on Line A of the Rome Metro.
- Outboard motorSelf-contained propulsion system for boats
- OutriggerProjecting structure on a boat
- Outrigger skiOutrigger skis are skis that are used by para-skiers to assist with balance, turn, control
- Overhead lineCable that provides power to electric railways, trams, and trolleybuses
- Overland Route (Union Pacific Railroad)The Overland Route was a train route operated jointly by the Union Pacific Railroad and th
- OverpassBridge, road, railway, or similar structure that crosses over another road or railway
- OvertakingOvertaking or passing is the act of one vehicle going past another slower moving vehicle,