Oh also here is a map of the train lines (after last week's game, so before Scenic Route was made). The pink string is the tracks (the green is Dave's conveyor belts)
Annoyingly, the game doesn't show any of this on the map in-game, so while I'm laying stuff out I don't really have any way of double-checking where existing lines are except by physically running over to them and looking at them with my eyeballs
