The Brenner Base Tunnel is a railway tunnel that connects Fortezza (Italy) to Innsbruck (Austria) for 55 Km. The lot currently in construction and subject to the contract is situated at north of the Base Tunnel in the City of Innsbruck. The project includes: the Tulfes emergency tunnel, East-West interconnection between the current railway tunnel and the future tunnel, realised using the traditional method, extension of the East and West areas of the main Ahrental, extension in the exploratory access shaft.

The contract was signed in May 2014 and is between the Brenner Basis Tunnel – BBT SE – and the joint venture composed of Salini Impregilo (49%) and Strabag (51%). The works began in July 2014 and must be completed by April 2019.

The total amount for the works is € 377 million.

The percentage of work completion as of June 30, 2015, was 9.5%.