Bologna-Florence Section

Turin-Salerno HS/HC Line

This section features a total length of 78.5 km, 73.3 km of which runs in tunnels: in fact, it can be likened to a sort of base tunnel crossing the Apennine mountain chain, designed and built in a highly complex geological and geotechnical environment in hard-to-reach areas. 
The 9 double-track tunnels (4 of which exceed 10 km in length: Vaglia 18.6 km, Firenzuola 15.2 km, Pianoro 10.8 km and Raticosa 10.4 km), with variable overburden depth of up to 600 m, interconnection chambers and shunting yards, were built using cutting-edge tunnelling techniques, ensuring speedy tunnel face advancement even while using conventional methods. 
The general safety system adopted is further enhanced by openings every 4 km and a service/emergency tunnel at Vaglia. 
In its supervisory capacity, Italferr has carried out design and construction oversight activities.