The lowering of the station main customs office took place with simultaneous increase of four busy roads with altogether approx. 20,000 daily wagons, in particular the Ungargasse, the Landstraßer main road, the Marxergasse and the rear Zollamtsstraße. They crossed under the connecting track before by means of long, hose-like underpasses with only very small passage heights of 3,6, 4,0 and 4,45 meters. For this purpose, a provisional station supported by 3,000 pilots had to be built first. Only then could the demolition of the old station begin, which in turn was connected to a movement of 380,000 cubic meters of earth and stone material, and the new construction of the final station. The transfer of the four above-mentioned streets required the construction of iron bridges in the width of 54.8, 70.2, 92.6 and 63.6 meters, also had existing water pipes and gas pipes with a total length of 2520 meters, various cables with a total length of 3520 meters, 260 meters pipe post pipes and the local main sewer are laid. The outflow of the Wiener Neustädter Canal was accomplished by the installation of a siphon.