I think RoR need similar scripts Farming Simulator for loads,bulk materials,etc,and similar scripts like Trainz,railworks,etc.,for passengers in buses,trains,etc. in RoR.
The download of tatra is here: https://archives.rigsofrods.net/old-forum/forums/116-Trucks/102723/page-0001.html
And in repo archive is 8x8vvn version :)