The Mont Blanc tunnel is open 24 hours a day all year long.
To allow maintenance works and safety exercises, a contraflow is set.
Alternating one-way traffic during the following nights, from 10:30 p.m. to 06:00 a.m.:
- February 9 to 11
The Tunnel will be closed to traffic during the following nights, from 1000 p.m. to 06:00 a.m.:
- January 25 to 26
- February 8 to 9
- February 22 to 23
- February 29 to March 1st
Possible inconvenience from 9 pm to 10 pm and from 6 am to 7 am due to the transit of any vehicles under escort.