The Klaus chain of tunnels: Klaus Tunnel Breakthrough in March

With the exception of the Klaus chain of tunnels and the Gleinalm Tunnel, Austria‘s Pyhrn Autobahn A9 toward the Slovakian border is fully completed. Work on the Klaus tunnels, specifically on the second bores of the Spering and Falkenstein tunnels, has been ongoing since the end of 2014, and started on the Klaus and Traunfried tunnels in May 2015. The most recent breakthrough in this series of tunnels took place on 3 March in the Klaus Tunnel; the new bore is to open to traffic as early as 2017, following civil-engineering finishing work and electrical fitting-out.

The Klaus chain of tunnels,...

Related articles:

Issue 03/2015 Austria

Second Klaus Tunnel Bore: Start of Excavation in April 2015

Currently the Klaus chain of tunnels between the Klaus and St. Pankraz/Hinterstoder junctions, the Bosruck and the Gleinalm tunnels, which represent undeveloped gaps on the A9 Pyhrn Motorway, are...


Karawanken Tunnel Breakthrough

Completion of the 2nd Bore Planned for Autumn 2025 This means that the inner lining of the new tunnel can begin in May 2024, followed by the installation of electrical equipment and safety systems....

Issue 02/2024 Austria/Slovenia | Österreich/Slowenien

Karawanken Tunnel Breakthrough

On 18 March 2024, the official tunnel breakthrough of the 2nd tube of the Karawanken Tunnel between Austria and Slovenia took place. This marks the completion of the tunnelling work on the 7.9 km long...

Issue 08/2011 Austria

Bosruck Tunnel: Breakthrough for 2nd Bore

The breakthrough of the second bore for the 5.5 km long Bosruck Tunnel designed for 2 lanes took place on August 11, 2011 after only 17 months of construction. It occurred 2.5 months earlier than...

Issue 05/2015 Austria

Gleinalm Tunnel: Second Bore broken through

After more than a year of tunnelling, the second bore of the 8320 m long Gleinalm Tunnel, the third longest road tunnel in Austria, was broken through in the middle of 2015. After the planned...