I’m glad you like it. 
The thing came out of questions here in the forum.
Yes, one could make a real race out of it, with terrain, ramps and bridges and multiple vehicles. Better models than I just copied them. And in addition, branches of the road, see Create a curved plane surface which dynamically changes its size - #20 by hofk
But that’s not my thing. I myself have never played computer games either. I don’t use modeling software either. I’m interested in mathematical relationships and algorithms. You can see that when you look at my Github page.
But maybe someone will take it as a suggestion and make something out of it. It can then be attached here.