Mont Blanc Motorways and Tunnel Mont Blanc Motorways and Tunnel

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Works : traffic informations

Roadworks and traffic information

- Châtelard and Chavants tunnels - in both directions - from September 8 to October 23:
. September 8 - October 17 : set up of 2 shelters at the entrance of both tunnels and renewal of security equipments.
Circulation on one lane in the Geneva > Chamonix direction in the tunnels.
. October 20 - October 23 : maintenance works and safety exercise, both tunnels will remain opened. Circulation on one lane on October 20 in the Chatelard tunnel and on October 21, 22 and 23 in the Chavants tunnel.

- Châtelard and Chavants tunnels – in the Geneva > Chamonix direction - from September 22 to November :
Type of work: maintenance work including security equipments.
Traffic conditions :
Traffic on one lane near / in both tunnels onto 5 km.
Speed limit : 70 km/h at road works and 50 km/h in both tunnels.
Overtaking strictly forbidden. 3.5 m) are strictly forbidden throughout the road works zone, unless escorted by ATMB. ATMB escort can be set on Mondays, Tuesdays, Wednesdays, Thursdays and Fridays from 5 am to 7 am and from 7 pm to 9 pm. ATMB services to contact 3 days before the convoy to plan escort conditions.

- ’Les Houches’ service area - from September 1 to December 19 :
. Restoration works in order to improve customer reception and service.
. During the works period : the main building will get closed but a shop and toilets will be temporarily set up. Oil distribution will remain available except from September 16 to 19 in the morning.