Dont know if this would even be possible, but i would suggest for when:

  "Max conductors": 1,
  "Spawn triggers respect conductor limit": false,​

the respective tunnel Workcart that spawns would always go around the tunnel map edges.

thanks as always!

The tunnel triggers aren't really designed for just a single train. You could try placing just one map trigger (per map) to add the conductor to a specific spawn point. Depending on which one you automate, that will determine it's route.

nice, ill try it out

andremelo90

nice, ill try it out

it worked, ive disabled default tunnel conductors by setting Max conductors to zero, added one map trigger/spawner/conductor (awt.add) inside a default workcart garage as you suggested. Didnt even have to create a route for it, just by setting it to select default tracks it goes only on tunnel map edges clockwise.