Open invitation to tender, deadline 11.08.2015, for general management during safety improvement of Strenger tunnel (5,851 m, 5,775 m) and its three bypass on S16. Duration of contract from 01.09.2015 to 30.03.2017. Contact Asfinag, attn Eng. Ulrich Engbert, Vienna, tel +43 5010814485, fax +43 5010814482, e-mail ulrich.engbert@asfinag.at. Visit http://ted.europa.eu/udl?request=Seek-Deliver&language=en&docid=225558-2015. Project n. 2015/@AVA ID-Nr:40592. 27/15.