On the suburban line the regular passenger traffic of the steam railway ended to 11 July 1932, why from 1936 the second track was removed. However, the freight traffic remained. In addition, at least the summer bathing trains to Praterspitz still operated until 27 August 1939, which no longer served the stops Oberdöbling and Unterdöbling. In addition, they were also important for the 1927 opened Hohe Warte bath and the 1928 congress bath opened. In contrast to the electrified sections of the Stadtbahn, the suburban line, which was located away from the important bombing targets, survived the Second World War largely unscathed. In the years 1950 and 1951, for example, it was already possible to travel from the suburban line to spa trains to Kritzendorf and St. Andrä-Wördern.