0

Operational construction sites

0 km

Of excavated tunnel

+ 0

Professionals at work

0 Billion

Worth of contracts awarded

* figures updated in September 2026 

A shared adventure 

Driven by an unprecedented French-Italian partnership, the Lyon-Turin project brings together institutions, businesses and thousands of dedicated professionals. Together, they are working to create a sustainable rail infrastructure that serves the regions and supports European mobility. 

The main focus of the project

Overall progress of the works: September 2026  

49.5 km of tunnels excavated  out of 164 km  

30.2%

The Lyon-Turin rail line will take one million heavy-duty trucks off the Alpine roads between France and Italy each year, thereby reducing greenhouse gas emissions by approximately 1 million metric tons of CO2 equivalent.

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News

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We will not stop

Italian, French, and EU institutions are standing alongside those working to ensure that the Lyon-Turin construction project moves forward safely.

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News

Prevention of PFAS on the construction sites: TELT launches a call for tenders for an innovative environmental monitoring system

The public promoter has outlined a strategy to limit the risks associated with these chemical compounds.

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News

Viviana tackles particularly complex section of the tunnel

After completing assembly, the TBM is advancing at a reduced pace to cross a geological fault

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Sites

Lyon-Turin #singleconstructionsite: progress June 2026

Update on the work on the Mont Cenis base tunnel between Italy and France and on above-ground works.

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Highlight

The first TBM for base tunnel excavation in Italy was unveiled

The giant 235-meter-long machine was delivered to the Herrenknecht factory in Germany, from where it will be transferred to the construction site in Chiomonte, Susa Valley.

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Highlight

TELT replies to the 2025 EU Court of Auditors Report

Based on the project approved by the States in 2015, the current cost is €11.1 billion.

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Featured videos

The single construction site of the Mont Cenis base tunnel

Latest videos

TELT | Excavation of the fourth ventilation shaft completed

TELT | The new interchange at the Chiomonte construction site

TELT | Inauguration of the excavated material treatment facility

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InfoChantier

Pour suivre l’avancée des chantiers du tunnel de base du Mont-Cenis près de chez vous, le magazine InfoChantier Maurienne rassemble les informations essentielles sur les travaux menés d’Avrieux à Saint-Julien-Montdenis, en passant par Villarodin-Bourget, Modane, Saint-Martin-la-Porte et La Praz.

InfoChantier Maurienne