Open invitation to tender, deadline 24/11/2023, for the construction of the Sisikon tunnel (Lot 200) on the new N4 Axenstrasse. The new N4 Axenstrasse - including the 2,891 m long Morschach tunnel and the 4,442 m long Sisikon tunnel - will be connected to the existing N4 national road in Ingenbohl and Gumpisch.For further information please click here (German) and/or here (French). Duration of the contract is from 31/03/2025 to 31/05/2034. Contact Projektleitung Bauherrngemeinschaft N4 Neue Axenstrasse, c/o Tiefbauamt Canton Schwyz, Schwyz, email submissionen.tba@sz.ch. Visit https://ted.europa.eu/en/notice/-/detail/422552-2023. 28/23.