Arlberg road tunnel

Underground Mining Traffic tunnel construction


Project data

ASFINAG Bau Management GmbH
Order sum
128.0 Mio EUR (in ARGE)
Period of implementation
April 2017 - October 2017

Sekretariat Untertagebau
+43 5556 7181-817

At 13,972 metres in length, the Arlberg road tunnel is the longest road tunnel in Austria and runs under the mountains at a depth of up to 1000 m. The Arlberg highway (S 16) runs through the single-tube tunnel between Vorarlberg and Tyrol which is operated by ASFINAG.

The road tunnel was opened to traffic in 1978; in order to improve its safety, eight tunnels connecting it to the parallel Arlberg railway tunnel were built in a first upgrading stage which was completed in 2008.

ARGE PKE-Jäger-BeMo-Hinteregger was awarded the contract for this refurbishment work, which was entirely concerned with improving the tunnel’s safety. Responsibility for the technical management fell to JÄGER BAU. 58% of the refurbishment was accounted for by construction work.


In addition to the renewal of the electrical and mechanical equipment and the re-equipment in the escape routes, the construction work included the following measures:

- 8 new breakdown bays,

- 37 escape routes (entranceways or stairwells from the driving tunnel tube to the supply air channel or the escape routes),

- construction of new fire extinguisher alcoves,

- installation of a new carriageway drainage system,

- roughening of the carriageway

- renovation of aquiferous block joints and cracks,

- concrete repair in the area of the galleries,

- renovation work in the operation buildings,

- construction of water protection systems at the portals.


Construction began in autumn 2014, and the refurbishment was completed in the autumn of 2017.

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