Safety

Safety precautions in the Mont Blanc Tunnel

After the 1999 closure, the tunnel underwent important restoration and modernization works, adopting solutions that constitute a reference model on a world level.

Modernization of the Mont Blanc Tunnel has consisted in equipping the infrastructure with high quality systems. The Tunnel has Centralized Technical Management (CTM), a computer system that checks and keeps the tunnel under constant surveillance along its entire length and processes data coming from over 35,000 control points. It is able to detect any anomaly and suggest to the operator the scenario that will allow him to use the appropriate road signs, adjust the ventilation, inform users (FM radio, variable message boards), give the alarm to emergency teams and give the alarm to and communicate with outside intervention teams.

A comprehensive safety system:

37 safe shelters
1 pure air channel linked to the safe shelters for the evacuation of users
116 SOS booths
120 cameras
12 FM radio frequencies that can be received inside the tunnel, broadcasting safety messages in three languages
40 half-barriers each associated with a variable message panel and a red traffic lig ht
20 overhead variable message boards
20 traffic lights per direction
1 thermometrie cable equipped with 3,860 sensors
1 conduit conveying water under pressure
78 firefighting booths
116 smoke extraction outlets
76 overhead air accelerators
10 radar speed control units
10 radar safety distance control units
36 emergency parking areas
1 central immediate intervention post and 2 externaiones
2 barriers at the entrances
4 water tanks with a capacity of 120 m3 each
4 640 lights