>>974631>>973695Chemnitz is in some way even a 2nd generation network, with it being entirely rebuilt in standard gauge on new right of ways from 1961-1988.
As for an actual first generation network, Freiburg for example lacks a dense inner city network and so far routes everything over two lines crossing themselves in one point, only now a second line is being built.
The red area is closed for parades or protest marches a couple of times a year. For those occasions, crossovers (some even in both directions) exist before the city center, and a loop from the eastern line. Most of the fleet is bidirectional, despite most terminuses having loops.
>See if you can spot the significance.Presorting tracks before the junction or the curve that only runs north->west?