The eastern tunnel portal is located in Gloggnitz, Lower Austria. ÖBB-Infrastruktur carried out preliminary work in the area from 2012 until the end of 2014. The tracks at Gloggnitz Railway Station have been converted for the transport of excavated material and the station has been given an accessible design. The construction site and the town have been provided with flood defences against the Schwarza river. In Göstritz, a bypass now keeps the site traffic away from the built-up area of Maria Schutz.