Austria
The twin-bore Tauern Tunnel commissioned
The 6.4 km long Tauern Tunnel (1971/1975) on the A10 motorway was provided with a second bore (2006/2010) following the accident in 1999 while the existing bore was redeveloped at the same time. In this connection the scheduled construction period was reduced by 5 months with the allotted investment costs being cut by 31 m. to 197 m. euros [1, 2]. On June 30, 2011 the twin-bore Tauern Tunnel went into service. As a result the roughly 192 km A10 motorway from Salzburg to Villach now possesses 4 lanes along its entire length with the tunnels all being twin-bore. Apart from the Brenner and Pyrn...
