Hey there, I was trying to rotate the wheels of a bus that is welded to a primary part, I first tried to use Motor6Ds, but that wasn’t really the best bet. Now I have tried to use hinge constraints, they are amazing for this, but the problem is that I teleport the bus in a tunnel after it has finished the first path. I even made a post about it but no one answer. Thanks for reading this! 
I recommend staying away from utilizing roblox physics to do the math of turning the wheel. If I were you, I would create my own engine to simulate that.
How would I create my own engine, then?