developed by the Semmering Base Tunnel and the Koralm Railway branch-off to Klagenfurt, Carinthia. The section from Graz to the Slovenian border, which had been downgraded to a single track railway in the 1950s, is currently again enlarged to double track. Within the Vienna metropolitan region, the sections between new Vienna Central Station, Wien Meidling, Mödling, Leobersdorf and Wiener Neustadt Hauptbahnhof are also part of the suburban Vienna S-Bahn railway network. Notes References External links Wien-Südbahnhof: Photogallery and documentation about the Vienna Southern Railway Station (Wien-Südbahnhof) by Martin Frey and Philipp Graf Railway lines in Austria Lower Austria Styria Baden District, Austria Bruck-Mürzzuschlag District Murtal District Mödling District Neunkirchen District, Austria Wiener Neustadt-Land District