LGV Sud-Est
| Company type | High-speed rail line |
|---|---|
| Industry | Rail transport |
| Founded | 1976 |
| Founder | SNCF |
| Successor | LGV Rhône-Alpes, LGV Méditerranée, LGV Interconnexion Est |
| Headquarters | Paris , France |
Area served | Paris, Lyon, and surrounding regions in France |
Key people | President François Mitterrand (at inauguration) |
| Products | High-speed passenger rail service (TGV) |
| Owner | SNCF |
| Parent | SNCF |
LGV Sud-Est
The LGV Sud-Est (French: Ligne à Grande Vitesse Sud-Est; English: South East high-speed rail line) represents the inaugural high-speed railway route in France, linking the Paris area with the Lyon region. It continues to be the most heavily trafficked high-speed rail corridor across Europe and holds the record as France's busiest.
Initiated in 1976 after more than ten years dedicated to technological advancements, the project involved pivotal strategic decisions. Notably, the choice to implement overhead electrification instead of gas turbine propulsion was shaped by both innovation considerations and geopolitical influences. The initial segment, stretching from Saint-Florentin to Sathonay-Camp, was officially launched by President François Mitterrand on 22 September 1981. Within its first ten months of operation, the LGV Sud-Est transported ten million passengers, leading to a marked decline in air travel between Paris and Lyon.
The impressive financial outcomes generated by LGV Sud-Est encouraged further development of additional high-speed lines such as the LGV Rhône-Alpes, LGV Méditerranée, and LGV Interconnexion Est. These expansions improved access to southern urban centers including Marseille, Montpellier, and Nice, as well as international links to Switzerland, Italy, the United Kingdom, and Belgium. Together, the LGV Rhône-Alpes, Sud-Est, and Méditerranée corridors have earned the nickname City To Coast (C2C) Highway ("Ville à la Mer").
History
After establishing SNCF’s research division in 1966, one of its primary initiatives was project "C03: Railways possibilities on new infrastructure (tracks)". In 1971, this project—later renamed "TGV Sud-Est"—received official endorsement from the French government. The 1973 oil crisis caused a surge in oil prices, prompting a strategic shift toward electric traction rather than gas turbine engines. This led to innovations such as high-speed pantographs and overhead electrification systems specifically designed for LGV Sud-Est.
Construction work on the LGV Sud-Est infrastructure commenced in 1976. In 1977, SNCF secured its first manufacturing contract with the Alstom–Francorail–MTE consortium for 87 TGV Sud-Est trainsets.
The LGV Sud-Est officially began service on 27 September 1981. It rapidly attracted ten million passengers within its initial ten months, substantially cutting domestic air travel between Paris and Lyon as commuters opted for the TGV.
By 2020, LGV Sud-Est maintained its status as France’s busiest railway line and Europe’s most utilized high-speed rail route. It accounted for approximately one-third of all rail traffic in France, operating up to 300 TGV trains daily and serving 52 million passengers in 2019.
Timeline
- 10 July 1967: The SNCF research department initiates project C03 focused on high-speed rail infrastructure development
- 26 March 1971: Inter-ministerial committee grants approval for the project
- 23 March 1976: Prime Minister Jacques Chirac signs the declaration of public utility
- 7 December 1976: Construction work commences at Écuisses, Saône-et-Loire
- 14 June 1979: Initial rails are installed near Montchanin, Saône-et-Loire
- 20 November 1980: Rail installation finalized in Cluny, Saône-et-Loire
- 26 February 1981: Trainset no.16 achieves a world rail speed record of 380 km/h between Courcelles-Frémoy and Dyé
- 22 September 1981: President François Mitterrand officially opens the first segment (Saint-Florentin to Montchanin)
- 27 September 1981: Commencement of commercial operations
- 25 September 1983: Northern segment (Combs-la-Ville to Saint-Florentin) begins service
- 31 August 1992: Minor injuries caused by flying ballast during derailment at Macon-Loché station
- 13 December 1992: Service starts on northern portion of LGV Rhône-Alpes
- 26 May 1994: Launch of service on LGV Interconnexion Est, connecting with LGV Nord
- March 1996: Initiation of refurbishment works including ballast and switch replacements, scheduled through to 2006
- 2 June 1996: Service begins at junction with Villeneuve-Saint-Georges via the Coubert triangle
Route
Traversing six French departments from north to south, the line passes through:
The TGV network seamlessly integrates with conventional railway lines, negating the necessity for additional infrastructure to reach principal stations in Paris and Lyon.
The distance between Paris (Gare de Lyon) and Lyon (Part-Dieu) is . The LGV alignment extends over , circumventing urban centers such as Dijon, thereby reducing travel distance by compared to the older line. Steeper gradients (up to 3.5% versus the previous maximum of 0.8%) permit a more straightforward route without requiring tunnels.
Crucial junctions connect the LGV with the standard rail network at:
- Pasilly-Aisy (towards Dijon and Switzerland)
- Mâcon-Pont-de-Veyle (towards Bourg-en-Bresse and Savoie)
- Saint-Florentin
- Le Creusot station
- Mâcon-Loché station
The latter three points facilitate maintenance trains and passenger rerouting when necessary.
Throughout its course, the line runs parallel to the A5 autoroute for and alongside the N79 road for . A corridor measuring wide is reserved specifically for telecommunications infrastructure.
Line specifics
Spanning , this corridor is narrower than that of Charles de Gaulle Airport (), featuring platforms wide and track centers spaced by . Engineered for velocities up to , curves maintain a minimum radius of .
The total track length amounts to , utilizing UIC 60 rails welded into sections. Concrete sleepers are secured by metal braces, with a density of approximately 1660 sleepers per kilometer.
Power supply is managed by eight EDF substations delivering 25 kV AC, supported by an inverted phase feeder cable equivalent to 50 kV, allowing individual trainsets to draw as much as 14 MW.
Signalling employs high-frequency track circuits that communicate directly with driver consoles through Transmission Voie-Machine (TVM), replacing conventional signal systems. This signalling technology is currently being upgraded to the European Rail Traffic Management System (ERTMS).
The highest elevation point along the route is near Liernais, situated above sea level, close to significant river valleys that separate the Seine, Loire, and Rhône basins.
Stations
The LGV Sud-Est includes service to the following stations:
Le Creusot and Mâcon-Loché are simple stations situated outside city centers, each comprising four tracks: two central tracks dedicated to non-stop trains and two outer tracks with platforms for trains that pause.
Costs
| Item | Nominal Cost (in 1984 francs) |
Adjusted Cost (in Template:Inflation/year euros) |
|---|---|---|
| Superstructure and infrastructure construction | 7.85 billion | Expression error: Unrecognized punctuation character "[". billion |
| Construction including land acquisition | 8.5 billion | Expression error: Unrecognized punctuation character "[". billion |
| Rolling stock procurement | 5.3 billion | Expression error: Unrecognized punctuation character "[". billion |
| Total expenditure | 13.8 billion | Expression error: Unrecognized punctuation character "[". billion |
Funding for LGV Sud-Est was mainly secured through debt held by SNCF. The project's prioritization relied heavily on profitability evaluations, which also factored in social advantages. Due to strong traffic volumes and revenues, the line surpassed its anticipated minimum financial return rate of 12%, achieving estimated annual socioeconomic returns ranging from 15% to 30%. This financial performance allowed complete repayment by 1993, after just 12 years without requiring subsidies—a contrast to subsequent LGV projects. The line’s economic success encouraged further governmental investment in high-speed rail infrastructure.
During the mid to late 1990s, track renewal efforts amounted to roughly €300 million. Maintenance activities are typically scheduled overnight to reduce service interruptions. From 2020 through 2023, a modernization program costing €300 million was implemented to improve capacity and reliability as part of a comprehensive upgrade across the LGV network.