The lines in the South-West quarter of the map are mostly built by
worldedit and need to be redone.
https://i.imgur.com/b5Vv548.jpg
Purple dots are existing stations. New tracks are red, yellow tracks
will be retraced, blue tracks will be optimised, green tracks will be
kept and brown tracks will be removed. The white numbers are suggested
order of jobs while the lines will be consistent at all times.