The authorities in Italy's northwestern Val d'Aosta region and France's Upper Savoy region linked by the Mont Blanc road tunnel have discussed its proposed closure "for a maximum of nine weeks to allow work to be carried out that cannot be postponed",

https://www.ansa.it/english/news/general_news/2023/09/26/mont-blanc-tunnel-to-close-for-nine-weeks-testolin_9a8c8e90-316d-449f-8305-29d4d5070e07.html