Second Gotthard Road Tunnel
Switzerland, Göschenen / Airolo
2022 – today
More safety

The 16.9 km long Gotthard road tunnel needs to be closed to traffic during renovation work necessitated by its age. To ensure the important north-south connection can nevertheless be maintained, a second, parallel tube is being built and then the existing tunnel will be renovated. 

Preparations for construction of the second tube include the construction of two access tunnels. For this, Herrenknecht received orders for two tunnel boring machines – a Single Shield TBM (Ø 7,390 mm) for the southern tunnel and a Gripper TBM (Ø 7,000 mm) for the northern tunnel. The official factory acceptance of the Single Shield TBM took place in January 2022, the acceptance of the second machine in May 2022. The miners started the mechanized excavation of the southern access tunnel in June 2022 and in August 2022 of the northern tunnel. 

Once all work on both tunnels has been completed, one tunnel each with one lane (plus emergency lane) will be available for southbound and northbound traffic. A significant increase in safety compared to previous operation with twoway traffic in one tube.

Data Sheet

Country, Location

Switzerland, Göschenen / Airolo


2022 – today




Gneiss with mica garnet, mica schist, hornblende, hornblende-schist, amphibolite, granite, gneiss, mica slate

Tunnelling length

8,804 m

Machine Data

1 x Gripper TBM
Diameter: 7,000mm
Lining method: Rock support
Cutterhead drive power: 2,800kW

1 x Singel Shield TBM
Diameter: 7,390mm
Lining method: Segmental lining
Cutterhead drive power: 2,800kW

Your contact person Contact us

Steffen Dubé President and General Manager Herrenknecht Tunnelling Systems USA Inc.
Gerhard Goisser Commercial Manager Herrenknecht Tunnelling Systems USA, Inc.