The majority of works will be conducted during the night to reduce the impact on traffic flow. More information about the exact dates of cleaning and maintenance operations can be found on this website or in the document below.
PDF: List of affected tunnels (FR)
Authorities will be in charge of a series of different tasks in each tunnel and complete checks of the following elements: ventilation systems, lighting, video cameras, fire alarms, SOS slots, sound installations, and the emergency phone.
