Open invitation to tender, deadline 15/03/2021, for the replacement of the 4 screen walls in the Control Center (PCC) and in the Operational Center on both sides of the Mont Blanc Tunnel. Duration of the contract 245 days. For tender documents please click here, where tenders must be sent and here. Contact GEIE Tunnel du Mont Blanc, Chamonix, tel +33 450553947, email Uacquisti@tunnelmb.com. Ref.n. P802. 07/21.