TRAFFIC INFORMATION

The Mont Blanc tunnel is open 24 hours a day all year long.

To allow maintenance works and safety exercises, a contraflow is set.

The Tunnel will be closed to traffic during the following nights, from 10:00 p.m. to 06:00 a.m.:

  • May 9 to 10 
  • May 23 to 24 
  • May 30 to 31 

Alternating one-way traffic during the following nights, from 10:30 p.m. to 06:00 a.m.:

  • May 10 to 12
  • May 17 to 19

 

Possible inconvenience from 9 pm to 10 pm and from 6 am to 7 am due to the transit of any vehicles under escort.