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Roadworks sites

As part of the Siaix tunnel compliance works, a project involves creating a gallery for emergency exits and the passage of cyclists, in both directions.

This gallery will be parallel with the main tunnel and they will be linked by seven cross passages.

The digging works will start on April the 18 and will last for about 18 months. During the works, to enable explosive shots, some closures of the tunnel are necessary (half an hour maximum).


An information system (in French) is available to inhabitants, so they can organize their movements in the area. A simple on line registration to the alert system enables to get information about the tunnel closures. Several alerts are available:

  • SMS alert
  • email alert
  • SMS and email alert


Two alerts are sent : 24 hours and 3 hours before the closure, in order to know and to confirm the time slot.


Register here :