Well, the answer of Vinayak Garg is good but since you work with perspective this won't be perfect. This is basically paralax mapping and works great for 2D games. But here you want to have the road dissapear in the horizon probably. If your road is straight then just extent on this technique and add many pieces until it is looking good. Whenever you leave a piece behind move it to the front.

If you want a curvy rode you have to look in procedural algorithms to generate a path for you can use pieces to correct this path. Perlin noise for example can be used for "infinite" randomization. They use it for minecraft in 3D, you just probably just need a 1D variant that just controls the the curve of the road. ANyway, this is a lot harder to implement.

How do I make an endless road in Unity?
Suppose you are given a $95 \%$ CI $(1,6)$ based on the normal distribution. Is there any easy way to find $\mu$ and $\sigma$? What if it came from a gamma distribution? Can we do this in R?
