TGV

The TGV is France's premier intercity high-speed rail service. Its name stands for "très haute vitesse," which means "very high speed."

This network is vital for modern European travel. It allows people to move between distant cities with incredible efficiency. In 2025, the TGV network in France carried 168 million passengers. This high volume of travelers shows how much people rely on the system. The service connects major French cities like Marseille, Lille, and Bordeaux. It also reaches into neighboring countries like Italy, Spain, Belgium, and Germany.

To achieve such high speeds, the TGV uses a specialized mechanical design. Every TGV train features two power cars, one at each end. Between these power cars are semi-permanently coupled, unpowered coaches. These coaches use an articulated design, which means they share parts with one another. Specifically, they use Jacobs bogies. A bogie is the wheeled frame underneath the train that supports its weight. In this system, a single bogie is shared between the ends of two adjacent coaches.

This setup is very beneficial for safety. If a train were to derail, the articulated carriages are more likely to stay upright and in line with the track. This prevents the cars from splitting apart or jackknifing.

Safety at high speeds requires advanced electronic systems. Because TGV trains travel so fast, drivers cannot always see traditional track-side signals. To solve this, engineers developed transmission voie-machine (TVM) cab-signalling technology. This system communicates directly with the driver's cab. If a train engages its emergency brakes, the TVM system can request all following trains to reduce speed within seconds. If the driver does not react to a signal within a set time, the system overrides the controls. It automatically reduces the train's speed to ensure safety. This reliable mechanism allows TGVs to depart from the same line as often as every three minutes.

The history of the TGV began with a shift in technological goals. In 1967, French officials began exploring high-speed ideas after Japan's Shinkansen project began. Initially, the project focused on gas turbines for power. These were chosen because they were small and had a good power-to-weight ratio. The first prototype, TGV 001, used this gas-turbine technology.

However, the 1973 oil crisis made gas turbines too expensive to use. Engineers pivoted to electric traction using overhead lines. This power is often generated by new nuclear power stations. The first electric prototype, nicknamed Zébulon, was completed in 1974. It tested new features like motor mounting and advanced braking.

Following these tests, the first commercial service launched on September 27, 1981. This inaugural service ran between Paris and Lyon on the LGV Sud-Est line.

The French government wanted the TGV to be a "national champion" project. They also wanted it to be accessible to everyone, not just wealthy business travelers. They ran major publicity campaigns to emphasize that ticket prices were similar to conventional trains. This helped the TGV become a popular way for all citizens to travel. By the mid-1990s, the service was so successful that the SNCF president called it the train that saved French railways.

The TGV has set several remarkable world records. On April 3, 2007, a modified TGV POS train reached 574.8 km/h during a test run.

This remains the world record for the fastest wheeled train. In 2007, the TGV also held the record for the fastest scheduled rail journey. This was measured by the average start-to-stop speed between the Gare de Champagne-Ardenne and Gare de Lorraine. While this specific record was later surpassed by a line in China, the TGV remains a leader in speed. Another notable feat occurred in 2006 when a Eurostar TGV set a record for the longest non-stop international high-speed journey. It carried a film crew from London to Cannes at an average speed of 225 km/h.

Today, the TGV is deeply integrated into the European economy and lifestyle. It connects to major hubs like Charles de Gaulle and Lyon–Saint-Exupéry airports.

It even serves tourist destinations like Disneyland Paris and Avignon. The network has grown into a "commuter belt" for cities like Tours and Le Mans, which are near Paris. Beyond France, the TGV system extends through various derivative networks. The Eurostar connects the UK to continental Europe via the Channel Tunnel. Other services like Thalys link France to Belgium, Germany, and the Netherlands. Future growth continues with projects like the Mont d'Ambin Base Tunnel, which is set to become the longest rail tunnel in the world.