Road works and traffic restrictions
The Mont Blanc tunnel is open 24 hours a day all year long.
To allow maintenance work, traffic will be set with a contraflow from 10.30 pm to 6.00 am, during the following nights :
. May 13th through 15th . May 21st through 23rd . May 27th through 30th
as follows : Possible inconvenience from 9 p.m. to 10 p.m. and from 6 a.m. to 7 a.m. due to the transit of any vehicles under escort.