Furthermore, on the Euralpin Lyon–Turin rail link project, VINCI Construction is responsible for recycling excavated material from the French side of the Mont-Cenis base tunnel (south-east France). More than 50% of the 23 million tonnes extracted will be reused in project-related works, for example to produce aggregates for the concrete needed to build the tunnel infrastructure and for railway sub-ballast, as well as for the platform in the new train station at Saint-Jean-de-Maurienne. The first excavated materials processing plant on this project was inaugurated at Illaz in October 2025.
Rail works. In this buoyant sector, specialist subsidiary ETF carried out track, catenary, signalling, platform and civil engineering work and provided safety-related services on national, urban and private networks in 2025. With its track renewal trains, it also carries out renovation and maintenance operations on France’s entire national rail network. On RER Line B, crews working alongside other VINCI Construction teams will build a second track for high-speed trains between Massy and Valenton (south of Paris). ETF is also renovating the Lunéville–Sarrebourg line and modernising the Laon–Hirson line, both in northern France.
Local projects, which account for more than 50% of revenue, included the extension of a tram depot in Le Mans (north-west France), the modernization of overhead lines between Nice and Ventimiglia (Italy), the modernisation of the Technicentre Sud Est Européen train maintenance centre in Paris, the second extension of the tram depot at Meyzieu (south-east France), and track replacement between Plounérin and Brest (Brittany).
In new urban mobility infrastructure, ETF is working alongside other divisions in the business line and VINCI Energies to fit out Line 15 West of the Grand Paris Express with track components, and is taking part in several tramway projects in Orléans (central France), Marseille (southern France), Lyon, Nantes (western France) and the Greater Paris area. After more than a year of construction work, the western extension of tram Line F in Strasbourg (eastern France) opened to passengers at the end of 2025. The subsidiary is also active on the Poitiers–Limoges rail line in south-west France, where section 1 between Saint-Benoît and Lathus-Saint-Rémy is being renewed as part of the 2017-2030 railway investment plan. The project aims to restore the line’s operational performance (speed, punctuality and quality of service) and covers 10 km of track and ballast replacement, 11 km of ballast alone, 35 km of ditch cleaning, 48 km of watertight seal removal and 6 km of subgrade cleaning. The environmentally sensitive areas that may be impacted have been carefully demarcated.
Hydraulic networks. Operations carried out by Sogea Environnement included a large number of local projects (maintenance and renovation of drinking water distribution and sewerage networks) as well as construction and modernisation of major hydraulic facilities. Crews are working on new wastewater treatment plants near the French-Swiss border and in south-east (Ain), south-west (Pyrénées-Atlantiques) and north-west France (Morbihan). Sogea Environnement was also involved in modernising wastewater and drinking water supply networks in the Greater Paris area, in particular on the Plateau de Saclay expansion project (south of Paris), part of the Paris-Saclay strategic development programme. As an extension of its water business, VINCI Construction is building or upgrading district heating networks in Mulhouse and Strasbourg (Alsace) and Le Havre (Normandy), as well as fibre optic networks. Working alongside VINCI Energies, Sogea Environnement is deploying fibre optics along the canals operated by Voies Navigables de France, as part of an initiative to modernise and secure the inland waterway network.
Earthworks, maritime and river works. Earthworks operations, mainly undertaken by the Terélian subsid-iary, are often carried out in synergy with other divisions and across a wide variety of jobs, such as river flow control structures and transport infrastructure (roads and railways). The company delivered earthworks for future construction projects in eastern France (a logistics hub in Belfort) and northern France (a base for a power station in Dunkirk and the Penly nuclear power station in Normandy).
Alongside its earthmoving operations, VINCI Construction undertook numerous ecological engineering projects under the Equo Vivo® brand. One of them, the eco-morphological restoration of the Reyssouze river downstream from Pont-de-Vaux (south-east France), involves rewilding 1.2 km of river and replanting more than 1,200 trees and shrubs and 7,500 semi-aquatic plants, to foster biodiversity by improving water quality and reconnecting the river with its natural environment.
Maritime and river works, carried out mainly by Océlian, included projects combining several teams with specialist expertise in rock stabilisation blasting and underwater works, notably at Port du Palais in Belle-Île-en-Mer (Brittany). Océlian also undertook works on EDF-owned dams, in addition to dredging, rock excavation and sheet-pile driving operations.
Deconstruction and road equipment. The Cardem subsidiary was involved in numerous projects involving the dismantling of engineering structures and urban buildings, and conversion of industrial sites. In particular, it completed work on the Kennedy building in Loos (northern France), which was demolished by implosion in the summer of 2025, and on the Fonderies du Poitou factory at Ingrandes-sur-Vienne (south-west France). On this project of vast proportions, which is illustrative of France’s industrial brownfield redevelopments, close to 60,000 sq. metres of buildings are to be deconstructed. A total of approximately 4,000 tonnes of materials (mostly steel) had been recycled.
