It is the third-longest road tunnel in the world after Norway's Lærdal Tunnel (24.5 km), and China's Zhongnanshan Tunnel (18 km).
After a large number of serious accidents, in Austria (Tauern Road Tunnel, 29 May 1999, as well as in other countries, (Mont Blanc Tunnel, 24 March 1999, Gotthard Tunnel, 24 October 2001), the Austrian government expressed its concerns about the safety in tunnels, not only in road tunnels, but also in railway tunnels, considering the large amounts of dangerous goods being transported through them.
Giezendanner supported the expansion of the Baregg tunnel (a bit of a bottleneck in the Swiss motorway network) in 2003, and the adding of a second tube of the Gotthard road tunnel.
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The federal government's policy of shifting the heavy transit traffic to rail, has been the cause of criticism of Giezendanner, because of his work on the Baregg tunnel and on the Gotthard road tunnel.
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However, the majority of traffic requiring passage between Airolo and Göschenen travels via either the Gotthard Rail Tunnel or the Gotthard Road Tunnel.