The Vienna S-Bahn consists of a multitude of branch lines extending beyond the city boundary, most of which converge at a central route segment called the Stammstrecke ("trunk line").
While many of the individual lines run at half-hourly or hourly intervals, they are able to offer combined frequencies of only a few minutes or less along the Stammstrecke.
Only line S45 operates entirely within Vienna's boundaries.

Unlike many S-Bahn networks in Germany, the Vienna S-Bahn is not a separate rail network.
It is integrated with, and part of, the national railway system.
As such, S-Bahn trains share tracks with regional trains (which travel further than the S-Bahn, some regional lines crossing into neighbouring countries) and other rail traffic, including freight trains.

The numbering of the lines has changed since the partial opening of the Wien Hauptbahnhof on 9 December 2012.

No lines except for S45 always have the same route and final station; most have trains that go further and ones that do not run to the terminal.
The Vienna S-Bahn consists of a multitude of branch lines extending beyond the city boundary, most of which converge at a central route segment called the Stammstrecke ("trunk line"). While many of the individual lines run at half-hourly or hourly intervals, they are able to offer combined frequencies of only a few minutes or less along the Stammstrecke. Only line S45 operates entirely within Vienna's boundaries.
Unlike many S-Bahn networks in Germany, the Vienna S-Bahn is not a separate rail network. It is integrated with, and part of, the national railway system. As such, S-Bahn trains share tracks with regional trains (which travel further than the S-Bahn, some regional lines crossing into neighbouring countries) and other rail traffic, including freight trains.
The numbering of the lines has changed since the partial opening of the Wien Hauptbahnhof on 9 December 2012.
No lines except for S45 always have the same route and final station; most have trains that go further and ones that do not run to the terminal.
Vienna S-Bahn