video preview: https://youtu.be/2BU-xybWqaU 
The road is made using a seamless 16K material with displacement.
Single lane gravel road. Islands of grass on the roadside.

The material is applied to any plane (road) with a width of about 4 meters and the corresponding UV with a tile size of 4×18 meters.
In the scene an example of the use of the material. Displacement height ~8cm. On the sides the displacement tends to zero.
High quality and resolution textures:
Diffuse Normal Glossiness – 4096x16384px Displacement (32-bit EXR) Ambient Occlusion (not connected): 2048x8192px
faces: 1600

*Vray 6 Corona 7 and up
*when importing from FBX make sure input gamma=1.0 (linear/non-color) for Normal_map