Procedural stuff works best if your project has rules.
Oh look, its a project where people drive trains on rails on planet earth. I heard making a railway route is rules only. How convinient.
1. More content per year than replicating RL.
2. More 😧
Two ways how to enter the phantasia land: There will be depots you can go in and come out in non-rl-map. The new map is either like the current one huge or split up in loading screens.
But yeah I really believe that railways are perfect match with procedurality.
Procedurality is a lot harder if your map needs to fill up something like the RD2 game.
But here everything is on rails and few meters next to it. So much more doable.