Klaus tunnel chain

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South portal of the Klauser tunnel
South portal of the Falkenstein tunnel

The Klaus tunnel chain is a section of the Austrian Pyhrn Autobahn (A9) in Upper Austria . This section consists of a series of tunnels and bridges in the Klaus an der Pyhrnbahn area and was only completed in September 2003 as one of the last sections of the Pyhrn Autobahn. For reasons of economy, the approximately 8 km long section, generally known as the Klaus Tunnel Chain, was only expanded with one lane in each direction until 2018. From north to south the following structures are part of the section:

  • Steyr valley crossing (278 m)
  • Klauser Tunnel (2,144 m)
  • Pertlgraben valley crossing (188 m)
  • Traunfriedtunnel (441 m)
  • Wallergraben valley crossing
  • Spering tunnel (2,852 m)
  • Rettenbach valley crossing (81 m)
  • Falkenstein tunnel (783 m)

The full expansion of the entire Klaus tunnel chain began at the end of 2013 with the construction of bridges. The second tunnel tubes for the Spering and Falkenstein tunnels had been under construction since December 4, 2014, those for the Traunfried and Klauser tunnels since May 8, 2015. In September 2017, the traffic was relocated to the newly built tunnel tubes and the existing route has been renovated since then. The construction work has now been completed. On December 19, the entire release took place.

Depending on the definition, the following structures are also part of the Klaus tunnel chain section (from north to south) at the northern end:

  • Underground line Ottsdorf / Thurnham (1,940 m)
  • Krems origin tunnel (920 m)
  • Hinterburgtunnel tunnel (225 m)
  • Bridge over the Pyhrnbahn
  • Kienberg tunnel (1,430 m)
  • Hungerbichl valley crossing bridge (140 m)
  • Hungerbichl Tunnel (510 m)

This section of approx. 9 km in length has already been expanded to four lanes.

Individual evidence

  1. ↑ ASFINAG: Today the tunnel chain Klaus (A 9 Pyhrn Autobahn) is open to traffic
  2. ↑ A 9 Pyhrn Autobahn full expansion of the Klaus tunnel chain. Retrieved on August 5, 2018 (German).
  3. ^ ASFINAG: Invitation to the general traffic opening of the A 9 tunnel chain Klaus on December 7th. Accessed December 3, 2018 (German).
  4. ↑ Two-tube tunnel extension on A9 completed. In: ORF Upper Austria. ORF Upper Austria, December 7, 2018, accessed on December 7, 2018 .
  5. ↑ The Klaus tunnel chain is released. In: ORF Upper Austria. ORF Upper Austria, December 18, 2018, accessed on December 19, 2018 .