text: I think this would require a multi-change to fix this.
  The reason why it was changed to a tunnel as far as I can tell is that orange freeway is layer 1.  It's above the train tracks orange subdivision so it's layer 0.  South Douglass road is below the train tracks so it needs to be a layer below 0, so it's -1 and hence it's a tunnel.  Seems the "correct" solution to not be a tunnel is that everything needs to be shifted up a level...