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.:

  • August 30 to 31 
  • September 5 to 6
  • September 12 to 13 
  • September 19 to 20 
  • September 26 to 27 

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

  • August 30 to September 1 
  • September 20 to 22 
  • September 27 to 29

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