I tried to create some scenarios but it seems to be almost impossible because many track sections are defined as one way. Can this be fixed? (I tried editing tracks.bin but I accidentally changed the direction for most signals so that wasn't the best way!
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Also I noticed that unfortunately many curves in station areas are too tight. As far as I'm aware the smallest curve radius that is used on mainline tracks is 190 m, which allows for 40 km/h. In the route I've seen down to 70 m radius, which could cause trains to derail.