A2 Secondo tubo San Gottardo
16.9 km
in lenght
14.173km
excavation with tunnel boring machines
7.4 million
tonnes of excavated material
13.5 m
per working day – advance rate in front of the fault zone
10 years
construction period
2.14 billion
project costs
20.3 m
per working day – advance rate after the fault zone
620'000 m2
installation area