To fix duplicate buildings:
1.Go to whatever drive location you installed the game <drive letter>\SteamLibrary\steamapps\workshop\content\1511460\3046334917
2.constructionCategories.json <-- select and delete

As far as i can tell at game runtime duplicate buildings gone, and still shows cars being produced, so i'm assuming this is a fix

I just found out by gradually disabling all modifications and then testing your mod as the only active one, that your mod duplicates buildings in building menu. Specifically mines, the others I don't know, I haven't studied further... o.o

wow this is what was missing

Yes trains do seem to transport the cars and busses as normal

Can cars be transported by train?

I never understood how this is not part of the very first original game.... there's no logic people not going to work.... thanks for the mod :-)

Holy. You destroyed my traffic flow. :_: