region from transit traffic", which raised barriers against road tunnel construction, was initially blocked by the Swiss Parliament. A February 1994 Alpine Initiative passed (with 52% of the vote), and Parliament upheld the referendum twice through the 1990s. The pro-tunnel Avanti Initiative brought a referendum to voters in February 2004, which was rejected (by 62.8%). The Swiss government has decided to upgrade the second tunnel into a full road tunnel in order to allow for the necessary reconstruction of the first road tunnel. Once the works on the first tunnel are finished, the Swiss government plans to operate one single lane in each tunnel (northbound traffic in the newly constructed tunnel, southbound traffic in the renovated one) in order to maintain the current tunnel overall capacity, in compliance with the Swiss constitutional norm that forbids a further growth of the traffic capacity across the Alps. The reconstruction would have lasted for several years in any variant – one variant would push the traffic over the mountain pass, another proposed to load the vehicles onto trains with a new terminal, a third would close the tunnel for several months every year over time range of a decade. All of these have their drawbacks and the usage of the second tunnel was chosen as the best option to allow for the reconstruction. Further usage of both tunnels was subject to a popular referendum that was held in February 2016, where it was approved. The actual upgrade mining of the second road tunnel would last from 2020 to 2027 at a cost of 2.7 billion francs for the whole project including the following reconstruction of the first tunnel. See also List of highest paved roads in Europe#Highest motorways References External links The official information page of the Gotthard Tunnel (in German and Italian, few pages also in English) More statistics and facts (as well as info on a second expressway tunnel) Road tunnels in Switzerland Tunnels in the canton of Uri Tunnels in Ticino Tunnels completed in 1980 Ticino–Uri border Tunnels in the Alps 1980 establishments in Switzerland 2001 fires in Europe 2001 disasters in Europe October 2001 events in Europe