@Tossi, thank you for your detailed explanation, this clears things up a little and highlights that poor timing can and will cause obstructions.
Ok with that, we’ll need some better signals then for it to work with more than 2 trains – something I already intend to investigate as soon as I get my hands on the game.
Reducing the loop to only 1 signal in each loop will mean that the signals will never clear as the rear of one train will simply lock exit from the loop and trains will sit in stalemate.
Watch this space 🙂