Hey thanks for making this mod. Lack of this option in vanilla has always bugged me.
This was working great for me but then all of a sudden it started giving the green signal when the next station isn't available. Here's a link to my save
https://drive.google.com/open?id=1z7f-j2zMwvSwnNH35AK-hiHGnKd9iclZ

The trains that go to the 'IronDrop' station will display the behaviour on automatic

I would really appreciate your help in resolving.

I think 0.1.6 solves the problem. Mind testing?

I'm fairly this was due to my code incorrectly checking 'IronUp' availability without detecting when all stations of that name were disabled, and signalling the train, which of course correctly skipped 'IronUp' and went straight to 'IronDrop'.

Your update seems to have fixed the issue. Much appreciated! thanks