![]() The Mont-Blanc tunnel sees around 1.700 heavy goods vehicles pass through the year, while light vehicle traffic averages 3.600 cars/day, with peaks of more than 6.000 in August and troughs in autumn. Tight and poorly ventilated, the Arve valley, which leads to the Mont-Blanc tunnel, regularly experiences episodes of air pollution, linked among other things to road traffic and its nitrogen dioxide emissions. In France, elected officials are worried about a risk of increased pollution in the Maurienne valley, where traffic could be transferred via the Fréjus tunnel, another important Franco-Italian axis. The operators, who are simultaneously carrying out renovation work on part of the slab, have so far always managed to stick to night closures, apart from a three-week period in the fall of 2022.Īt the time, leaks in the Italian press on potential shutdown scenarios had caused serious concern in Italian business circles, with some fearing that they would "bring the country's economy to its knees". The long closing periods will be a "first" for the tunnel since it reopened in 2002 after the fire that ravaged it on March 24, 1999, costing the lives of 39 people. ![]() It is about its "sustainability in the long term", he explained to AFP. ![]() Built 60 years ago, used daily by thousands of vehicles, this two-way structure, 11,6 km long, is at a stage where one-off repairs are no longer enough: "we have chosen to make more important, more substantial work to give a second life to this tunnel", explains Grégory Schwarshaupt, deputy director of the French concession company Autoroutes et Tunnel du Mont-Blanc (ATMB). ![]()
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