TGV
Overview
 
The TGV is France
France
The French Republic , The French Republic , The French Republic , (commonly known as France , is a unitary semi-presidential republic in Western Europe with several overseas territories and islands located on other continents and in the Indian, Pacific, and Atlantic oceans. Metropolitan France...

's high-speed rail
High-speed rail
High-speed rail is a type of passenger rail transport that operates significantly faster than the normal speed of rail traffic. Specific definitions by the European Union include for upgraded track and or faster for new track, whilst in the United States, the U.S...

 service, currently operated by SNCF Voyages, the long-distance rail branch of SNCF
SNCF
The SNCF , is France's national state-owned railway company. SNCF operates the country's national rail services, including the TGV, France's high-speed rail network...

, the French national rail operator
Rail transport operations
A railway has two major components: the rolling stock and the infrastructure .-Operation:...

.

It was developed during the 1970s by GEC-Alsthom (now Alstom
Alstom
Alstom is a large multinational conglomerate which holds interests in the power generation and transport markets. According to the company website, in the years 2010-2011 Alstom had annual sales of over €20.9 billion, and employed more than 85,000 people in 70 countries. Alstom's headquarters are...

) and SNCF. Although originally designed to be powered by gas turbine
Gas turbine
A gas turbine, also called a combustion turbine, is a type of internal combustion engine. It has an upstream rotating compressor coupled to a downstream turbine, and a combustion chamber in-between....

s, the TGV prototypes evolved into electric trains with the petrol crisis of 1973. Following the inaugural TGV service between Paris
Paris
Paris is the capital and largest city in France, situated on the river Seine, in northern France, at the heart of the Île-de-France region...

 and Lyon
Lyon
Lyon , is a city in east-central France in the Rhône-Alpes region, situated between Paris and Marseille. Lyon is located at from Paris, from Marseille, from Geneva, from Turin, and from Barcelona. The residents of the city are called Lyonnais....

 in 1981, the TGV network, centred on Paris, has expanded to connect cities across France and in adjacent countries.

A TGV test train set the record
Land speed record for railed vehicles
Determination of the fastest rail vehicle in the world varies depending on the definition of "rail".Official absolute world record for conventional train is held by the French TGV...

 for the fastest wheeled train, reaching 574.8 km/h (357.2 mph) on 3 April 2007.

At mid 2011, the TGV is the fastest conventional train in the world, reaching 320 km/h (198.8 mph) on the "LGV Est
LGV Est
The LGV Est européenne is an extension to the French high-speed rail network, connecting currently Vaires-sur-Marne and Baudrecourt , and later Vaires-sur-Marne and Vendenheim . , it is the newest high-speed line in France and still under construction, with of a planned in service...

".

A TGV service held the record for the fastest scheduled rail journey with a start to stop average speed of 279.4 km/h (173.6 mph), which was temporarily surpassed by the Chinese CRH
China Railway High-speed
China Railway High-speed ; ) is the high-speed rail system operated by China Railways.Hexie Hao is the designation for high-speed trains running on this rail system. At the middle of the run, all trains were marked "CRH" on the centre of the head vehicle and the side of the walls of each vehicle...

 service Harmony express on the Wuhan–Guangzhou High-Speed Railway
Wuhan–Guangzhou High-Speed Railway
The Wuguang High-Speed Railway , short for Beijing–Guangzhou High-Speed Railway, Wuhan–Guangzhou Section, is a high-speed rail line, operated by China Railway High-speed , connecting Wuhan and Guangzhou , in the People's Republic of China...

 from December 2009 until July 2011.

The success of the first line led to an expansion of the network, with new lines built in the south, west, north and east of the country.
 
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