On 15 October 1909, the StEG was nationalised and with it became a part of the Imperial Royal Austrian State Railways or kkStB.
In the territories which form the current Austria, the StEG network covered a total of about 255 km.
Its start point was the state railway station in Vienna, later the Ostbahnhof, which is today part of the Südbahnhof.
The line from Vienna in the northern direction was opened in 1870 and crossed the Danube and then divided at Stadlau to reach Marchegg and Bratislava in the east; the other branch ran via Mistelbach and Laa an der Thaya to Brno in the north.
In addition, a short domestic line in Vienna from the Erdbergerlände to the horse racing track at Freudenau was built in 1886.