What does the French abbreviation 'TGV' stand for?

The French abbreviation “TGV” stands for Train à Grande Vitesse, meaning “high-speed train.”

TGV is both a descriptive abbreviation and the name of France’s flagship high-speed rail service, operated by SNCF. The first public TGV service began between Paris and Lyon in 1981, launching a network built around dedicated lignes à grande vitesse (LGV).

The name has an interesting technical history. Early development focused on gas-turbine trains, and the experimental TGV 001 used the abbreviation for “Turbotrain à Grande Vitesse.” After the 1973 oil crisis, France shifted to electric trains powered from overhead wires, and the familiar expansion became Train à Grande Vitesse.

TGV trains are often confused with LGV lines: TGV refers to the train or service, while LGV refers to the high-speed infrastructure. Modern TGVs can operate at up to 320 km/h on newer lines, while a specially modified test train reached 574.8 km/h in 2007—far above normal passenger speeds.