Misotweaks is a mod for Polytrack. In it, you can do cool things that you cannot do on normal PolyTrack, such as honking your horn or choosing the height of a map.
If you want to play it, you can play it here: https://missonance.github.io/misotweaks/
The person who made this hacks and uses TAS (not publicly available), but it is still a good mod. I hope this helped!
Other mods include: (CWCTrack) https://cwctrack.cwcinc.dev/ and (Aston Martin 0.4.0) https://stuffed18.github.io/aston-martin-polytrack/