Scope of work
Grouft Tunnel, Luxembourg;
twin-tube, two-lane motorway tunnel
Grand-Duché de Luxembourg - Ministère des Travaux Publics
[Grand Duchy of Luxembourg - Ministry of Public Works]
represented by Administration des Ponts et Chaussées,
Luxembourg [Bridge and Road Department]
Wayss & Freytag Ingenieurbau AG
as technical leader of a joint venture
February 2005 to August 2009
€ 171 million
The Henndorf bypass lead to a noticeable relief of traffic congestion. Centrepiece of the bypass is the double lane 2,150 meters long road tunnel, which is now used by approx. 20,000 vehicles per day.
The Silberberg railway tunnel in the Thuringian Forest is part of the new Ebensfeld – Erfurt railway line. The new line connects the old and the new federal states.
The extension of the Klaus tunnel string with the 2nd tubes on the A9 Pyhrn motorway in Austria means the end of oncoming traffic and thus provides better safety for 18,000 drivers per day.