>>937076That is entirely dependent upon the station's size and design of the station and network.
I envision:
- cylindrical space station with the center hollow (free of supports) for recreation, specialized manufacturing, or storage.
- circular hollow struts for rigidity.
- the track would be a ribbon with a full twist. One half twists near the ends of the cylinder where the normal force is weakest.
- you would need a system where the cabin rotates with the twist so you are right side up the whole time. This could be achieved by the cabin rotate within the railcar.
- you would have cars running both directions simultaneously, both suspended and not suspended.
- this means you would have travel in both direction on opposite sides of the station.
- it also means that you would have transport to anywhere else in the station within a quarter circumfrence walking distance.
(plus the distance to the nearest stop/station, but because geometry/statistics, it should work out to ~1/4 circumference at most on average.)
>tl;dr having rail/elevators run through the center of a space station is retarded>tl;dr tl;dr you could have the circuit be made of any number of tracks while maintaining a single 'loop', but two is ideal and three is close enough. You might want three (1.5 twists) tracks due to issues with geometry/engineering and preventing buckling. 
