The project involved the construction of a security tunnel that transforms the Fréjus tunnel into a double-barrel tunnel with one-way circulation in each barrel. On the Italian side, a series of buildings supporting the various activities of control and management of the two infrastructures are planned to service this new tunnel and the existing one:
-Building A: first intervention management and support building;
-Building B and C: parking, warehouses and offices;
-Building D and E: ventilation and ventilation tower;
-Building F: garage for heavy vehicles
The company collaborated with the DMRU studio in Milan on the structural executive project of these buildings.