Detail this asset from Unity Store: Original Link
This is a paid asset, but now you can download Wet Road Materials Free.
Wet Road Materials v2.5
Wet Road Materials v2.3
– New Road6 and RoadTiled6 textures (2048×2048)
Road Shader and Skybox included.
Want to create realistic roads in your game? This asset will help you.
8 different reflecting materials with the ability to adjust the puddles.
3 Layers of Wet Textures. You can adjust material parameters.
Materials with Roughness map (reflection) and Normal map.
*Night Panorama not included.
Soon new shader and textures update.