Open invitation to tender, deadline 07.12.2015, for the refurbishment of the Axen tunnel, which is on the lakeside, between Brunnen and Flüelen. The contract includes the following four subprojects: TS – Refurbishment of 8 tunnels totaling 5377 m; FB - Development and Construction of a railway track; IB - Civil engineering for the maintenance of bridges, retaining walls and water pipes; Option - Works for the N4 Road dell'Axen. Duration of the contract is from 03.07.2016 to 08.05.2020. For further information and details visit http://www.simap.ch/shabforms/servlet/Search?NOTICE_NR=879133. To contact - Infrastruktur, Project North-South axis Gotthard, Lucerne. Send offers to Infrastruktur, att.ne Kurt Fehr, Lucerne, email kurt.fehr@sbb.ch. Log in http://ted.europa.eu/udl?request=Seek-Deliver&language=it&docid=314084-2015, OJ S 172. Rif.n. 1134566. 37/15.