Open invitation to tender, deadline 21/11/2025, for the safety reinforcement of the intermediate ventilation slab of the MontSagne (1355 m) and Vue des Alpes (3250 m) tunnels between Chaux-de-Fonds and Neuchâtel (Lot 2 Civil Works) on the N20.For bid documents, please click here. The duration of the contract is from 15/02/2026 to 31/12/2027. Contact Ofrou, Estavayer-le-Lac, tel +41 58 461 87 11, email marchespublics.estavayer@astra.admin.ch. Visit https://ted.europa.eu/en/notice/-/detail/647551-2025. Ref.n. N20.72 MP-200061. 40/25.
