In May - July 2026, a series of traffic restrictions will be implemented for drivers going through the Mont Blanc Tunnel. On some nights, the tunnel will be completely closed to traffic, while on others, alternating one-way traffic will be implemented.
From May to July, the tunnel will be completely closed for 13 nights. Information about these closures is provided in the table below.
| Date | Weekday | Closure hours |
| May 18th |
Monday |
From 10 PM to 6 AM |
| May 19th |
Tuesday |
From 10 PM to 6 AM |
|
May 20th |
Wednesday |
From 10 PM to 6 AM |
|
May 21st |
Thursday |
From 10 PM to 6 AM |
|
June 8th |
Monday |
From 7 PM to 6 AM |
|
June 9th |
Tuesday |
From 10 PM to 6 AM |
|
June 10th |
Wednesday |
From 10 PM to 6 AM |
|
June 11th |
Thursday |
From 10 PM to 6 AM |
|
June 25th |
Thursday |
From 10 PM to 6 AM |
|
June 29th |
Monday |
From 10 PM to 6 AM |
|
June 30th |
Tuesday |
From 10 PM to 6 AM |
|
July 1st |
Wednesday |
From 10 PM to 6 AM |
|
July 2nd |
Thursday |
From 10 PM to 6 AM |
On June 24th, alternating one-way traffic will apply in the Tunnel. These restrictions will be in place from 10.30 PM until 6 AM.