Don't expect updates too often, but I have secretly been making a Newark Airport Airtrain route in TS16. I just finished the skeleton, detailing will not be finished in one big update. The detailing probably won't be accurate, either, as I don't live near EWR or its AirTrain system.
Here's a little video showing the monorail arriving and departing P4 on the route:
https://www.youtube.com/watch?v=gwH1cKDZoVoThis is a full route running from the RailLink station to P1, or technically P2 because P1 is closed