Picking up this old thread again...
Ragnar, if they left out a whole line, do you also have stations that have notably been left out? In Stockholm, one station in the middle of a line was built but never opened. (The planners cancelled the residential area it was intended to serve.) On the "map" of the lines the otherwise equally spaced stations leave a gap where it should have been.
Yes, there is a station that has been left out. When the former steam Stadtbahn line "Vorortelinie" (suburb line) was reopened as an electric Schnellbahn line in 1987 the station Unterdöbling that existed from 1898 to 1961 (though more or less out of service since 1932 when the regular service was cancelled) wasn't rebuilt. You can see where the trench walls go back leaving space for the platforms but there aren't any. (The S45 is mostly routed in an open trench).
Btw, the Vienna tram network is standard gauge (1435mm) and operates on nominal 600V DC, said to be changed to 750V where new construction takes place. The tram cars don't mind the higher voltage, according to the specifications the subway car type T is designed to work on 550 to 900V. The Badnerbahn (mix of tram and railway line to Baden near Vienna) uses the 600V tram catenary inside Vienna, then switches to the 750V U6 network at Schedifkaplatz and after one stop goes up to 900V for the long-distance route to Baden.
