Austria

Second Bore for Bosruck Tunnel

The Asfinag as operator of the motorway in Austria has commissioned the construction of a second tunnel bore with 5 breakdown bays and
11 cross-passages (6 of them negotiable with vehicles) for the at present 2-lane bidirectional Bosruck Tunnel as well as redevelopment of the existing tunnel bore. Thanks to the complete renewal of the Bosruck Tunnel with directional traffic flowing in 2 bores a bottleneck causing tailbacks on the A9 Pyhrn Autobahn will be removed. After beginning work in 2009 the completion of the 2nd bore is expected in 2013 and the tunnel will be fully operational in 2015...

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Issue 06/2013 Austria

Bosruck Tunnel: Redeveloping the existing Bore

A second bore was produced by drill+blast using the New Austrian Tunnelling Method (NATM) for the 5.5 km long, 2-lane Bosruck Tunnel on the A?9 motorway. It possesses 2 lanes. After being broken...

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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...

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Issue 08/2015 Austria

Twin-bore Upgrading of the Bosruck Tunnel completed

The 5425 m long Bosruck Tunnel between the states of Upper Austria and Styria has been in operation since 1983, and traffic has been running through a new second bore since summer 2013. After thorough...

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Issue 02/2013 Austria

Pfänder Tunnel: 2nd Bore opened for Traffic

The 6,585 m long, two-lane Pfänder Tunnel on the A14 in Vorarlberg/Austria with an average daily frequency exceeding 30,000 vehicles is being provided with a second bore, which is also 2-lane, to...

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Issue 03/2018 Switzerland

Gubrist Tunnel, Third Bore

The 3.3 km long Gubrist Tunnel is part of Zurich’s North Bypass between the communities of Weiningen and Regensdorf. The road tunnel began operating in 1985 and possesses two separate directional...

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