Refurbishment of 4 tunnel systems

The A9 is part of a 230 km long north-south transit axis between the crossroad Voralpenkreuz and Spielfeld on the border to Slovenia. It is thus an important north-south transversal, not only in Austria but also in the European transport network. The tunnels Kremsursprung, Ottsdorf, Hinterburg and Tretter are situated between the motorway junction Klaus and Inzersdorf. DÜRR Austria was awarded with the contract in October 2017 and the traffic release of the A9 took place in February 2019 after a one and a half years project period.