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.:
- december 5 to 6
- december 12 to 13
The Tunnel will be closed to traffic during the night of cecember 15 to 16, from 11:45 p.m. to 04:15 a.m.
Alternating one-way traffic during the following nights, from 10:30 p.m. to 06:00 a.m.:
- December 13 to december 14 inclusive
Possible inconvenience from 9 pm to 10 pm and from 6 am to 7 am due to the transit of any vehicles under escort.