Mont Blanc Tunnel


The Mont Blanc Tunnel is a highway tunnel connecting Courmayeur, in the Aosta Valley, to Chamonix, in the French department of Haute-Savoie. It consists of a single two-way tunnel and is one of the major transalpine transport routes.


  • Design, supply and installation of LV/MV distribution system
  • Fiber optic network – radio transmission
  • CCTVs
  • Ventilation and control system
  • Variable message signs
  • Traffic lights
  • Linear detectors
  • Fire protection systems
  • Speed and distance detectors
  • Other tunnel control systems (power supply, air control, emergency call, lighting control, temperature detection, A.I.D., traffic signals) The entire tunnel control consists of about 35,000 controlled points

Area of intervention: MOUNT BIANCA TRAFFIC
Client: SITMB – Italian Society for the Mont Blanc Tunnel S.p.A.
Joint venture: Cegelec
Contract: Upgrading work inside the tunnel: Emergency stations located inside cabins including all equipment required by law; implementation of signage indicating SOS stations and escape routes; measures to increase safety
Tunnel: One-way tunnel with two-way traffic
Total length: 11.6 km
Daily traffic: About 5000 vehicles
Value: €35,100,000.00
Duration: 3 years
Period: 2000 – 2003

References in tunnels and roads