The road of repeating segments with a seamless texture. You can modify the shape and direction of the segment as desired with Path Deform Bend FFD (Box) modifiers Railclone plugin etc.
The width of the sidewalk is 5.7 meters (2.5m area without heaps) length – 8 meters.
High resolution textures:
Diffuse-8192 * 4096px;
Displacement (32-bit EXR) normal specular ambient occlusion-4096 * 2048px.

Vray 3.0 Blinn reflections VrayBlend Vray transluncency (disable trace refraction to speed up rendering) VrayFlakes VrayDisplacementsMod and VrayNormalMap (switch them for near / far frames).
Corona 1.6 CoronaDisplacementMod CoronaNormal.
2816 polygons per segment.

FBX files do not contain DisplacementMod.