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The Mont Blanc Tunnel will not experience a prolonged closure in 2026.

Tunnel du Mont Blanc in Chamonix

The motorway company ATMB recently reiterated that there will be no extended autumn closures in 2026.

However, in 2027 and 2028, the closure model used in the previous two years will return, with two cycles of three and a half months.

For subsequent years, the continuation of the project and the chosen option will be a decision for the Italian and French governments.

These are the words of Christophe Castaner, Chairman of ATMB.

UTMB Chamonix: The complete program for the 2026 edition