The extension of the gallery route along the Danube Canal also affected the connecting arch, which was originally only 850 meters long. Due to the lowering of his starting point, he could no longer take Brigittabrücke to the station Nußdorfer Straße, i.e. in place of today's Nordbergbrücke, because otherwise the slope of the ramp to the bridge over the Franz-Josefs-Bahn would have been too strong. Instead, the planners artificially prolonged it to a north-sweeping turn to achieve a more favorable pitch ratio. Thus, however, the already built branch at the station Nußdorfer road was useless, this construction advance in the area of the arcs with the numbers 179-184 remained until today. As a substitute the roundabout Nußdorfer Straße was built about 300 meters further in the direction of Heiligenstadt.