A parallel rescue tunnel is used in case of emergencies. The tunnel site is monitored continuously by 220 cameras. The Fréjus tunnel consists of two traffic lanes. Tunnel ventilation is provided by means of six air circulation (ventilation) plants, four of them underground. The French end of the tunnel has one vertical shaft, whereas the Italian end consists of two shafts for ventilation. The bore was driven by blasting through the Alpines using explosives. ![]() Tunnel construction was initiated in 1973 and completed in 1979. SFTRF manages the French section of the tunnel, while the Italian section is managed by SITAF. It cost approximately two billion francs at that time. The Fréjus road tunnel connecting France and Italy through the Northern Alps is the sixth longest road tunnel in the world. The journey inside the tunnel is made safe and pleasant by two FM channels, that provide entertainment and information. Automated enforcement cameras continuously monitor the speed, tailgaters and lane-changers throughout the length of the tunnel. Traffic inside the tunnel is managed with the help of traffic control equipment supplied by Moxa. It was a challenging and painful engineering task, with almost hundred ground collapses and major mishaps trapping the tunnel boring machines inside. It connects the Taipei and Yilan counties of Taiwan, reducing the journey time between the two places from two hours to less than 40 minutes.Ĭhinese construction company RSEA constructed the tunnel during 15 years, facing numerous challenges posed by the complex geology of the Hsuehshan mountain range. The tunnel opened to traffic in June 2006 and is also the second longest road tunnel in the Asia-Pacific region. In addition to replacing the existing equipment, it will add 37 additional escape routes and reduce the distance of the escape route from the current 1,700m to 500m, making the tunnel much safer.Īt 12.94km long, the Hsuehshan tunnel in Taiwan stands at fifth among the world’s longest road tunnels. The €136m ($183m) upgrade will be carried out from 2014 to 2017. ![]() It has eight escape routes and is monitored continuously through more than 40 video cameras.Ī major renovation and safety upgrade is on the cards to replace outdated equipment and further improve the safety standards. The tunnel is currently used by more than 8,000 vehicles a day and is the safest means of transportation along the route during winter. It took four years to construct and was officially opened to traffic in 1978. It connects the Tyrol province located in the east with Austria’s westernmost province, Vorarlberg. It is part of the Arlberg highway (S16 Arlbergschnellstraße in German) and crosses the Arlberg mountain ranges. The 13.97km long Arlberg road tunnel in Austria ranks as the world’s fourth longest tunnel. The world’s longest suspension bridges Arlberg Road Tunnel, Austria It will, however, not come into use before 2027. The Switzerland Government has decided to develop a second road tunnel through the Gotthard mountain range in order to reduce the traffic congestion through the existing tunnel. ![]() Incidences of fatal accidents, involving especially trucks, have been of increasing concern. Being a single tube, it has been witnessing heavy traffic jams at the north and south ends of the tunnel. The tunnel currently carries more than 17,000 vehicles per day through the Gotthard mountains. It currently ranks as the world’s third longest road tunnel. It is part of the A2 motorway and contains a single bore with one lane in each direction. The road tunnel took ten years to complete, from 1970 to 1980. Gotthard tunnel is a Swiss marvel stretching across 16.94km. Artificial plants and pictures of clouds projected over the roof of the tube interiors make journeys through the tunnel pleasant, while also reducing eye strain. They were bored using conventional methods of drilling and blasting through the gneiss and granite rocks.Įach of the 6m-high tubes has coloured and patterned lighting to keep drivers alert. The two tubes of the tunnel allow four lanes of vehicle traffic at a maximum speed of 80km/h. The tunnel is built on a north-south highway connecting Baotou to Beihai, and it cost $410m.
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