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On 1 April 2025, the Viviana TBM was baptised on the French side at Saint-Martin-la-Porte. This is the first machine to break through the Mont-Cenis base tunnel. The baptism took place in the presence of French Transport Minister Philippe Tabarot, and the Chairman of TELT, the bi-national public promoter of the project, Daniel Bursaux.
The aim of the TELT project is to make a significant contribution to reducing road traffic in the Alps and increasing the attractiveness of low-carbon rail freight. It is a real project for the future, serving to interconnect networks, ensure the safety of trade, and decarbonise mobility.
Annelise Baudouin, Rail department manager, SYSTRA France
The Viviana TBM will be helping to break through Operational Site 6-7, the longest section of the TELT, with around 25km of base tunnel to be bored between the Saint-Martin-la-Porte and La Praz descents*. Six other TBMs will be needed to complete this project, which will last until at least 2030.
One of the world’s largest underground projects
TELT is set to become the world’s longest railway tunnel, at 57.5km in length. Between now and 2027, seven TBMs will be in action, and simultaneous digging will take place on 15 fronts, in extreme geological conditions up to 2,200 metres beneath the Alpine rock. This is a gigantic challenge in which the SYSTRA Group is playing a major part:
- In France, as part of the S2IP project management consortium, with Setec (lead), Italferr and Pini Group/ARX, for work packages CO 6-7;
- In Italy, as part of the consortium led by Italferr, and at the interconnection of the tunnel and the Susa Plain, for work packages CO 3-4, CO 1 and CO 2 respectively.
In total, this represents a major contribution to more than 60% of the final length of the TELT. In addition to these work packages, there are many others, including the preparation of the new international stations.
When it comes into service, the TELT will be the backbone of the trans-European transport networks: it will cross the Franco-Italian border with unprecedented efficiency, bring the European rail networks from Spain to Eastern Europe closer together, and be the keystone of the Mediterranean corridor of the European TEN-T network.
The future Lyon-Turin line wins the IRJ Top Projects Awards 2025
On 3 April 2025, the first IRJ Top Projects Awards, organised by the specialist magazine International Railway Journal (IRJ), recognised the new Lyon-Turin line in the ‘New Construction/High Speed’ category. This positions the future Lyon-Turin line, which will cross the TELT, as an emblematic world reference.