Open invitation to tender, deadline 10/05/2021, for the design of the Fasenstaub’s safety tunnel (1496 m), part of the N04/06 motorway. The safety tunnel will be 40 m from the main tube and connected to it by bypasses each 150 m. The duration of the contract is from 01/01/2022 to 31/12/2026. Further tender information can be found here (German) and/or here (French) also here. Contact Ofrou, Winterthour, tel +41 58 480 47 11, fax +41 58 480 47 90, email beschaffung.winterthur@astra.admin.ch. Ref.n. 090229. 14/21.
