Free Add on: Asphalt Texture Generator - BlenderNation
Blender 3D: Noob to Pro/Every Material Known to Man/Asphalt - Wikibooks, open books for an open world
Blend Swap | Procedural Asphalt Shader
Procedural Asphalt Node. Been requests for this, so posting a simple version of nodes. Add some cracks and tire treads to increase realism : r/ blender