Detail this asset from Unity Store: Original Link
This is a paid asset, but now you can download SciFi Neon City Free.
SciFi Neon City v1.1
Neon City brings to you the ability for creating a complex cyberpunk style city using basic prefabs (grid snap ready) or premade modular walls depending on your customization request. Also with a high quality texture library using multimaterials you are able to customize the lookup of your city according to your needs. Includes lots of street details (lighting, street furniture, pipes, fences, fire stairs, etc.) to give your environment a believeable ambience. Finally using customizable building prefabs you can design the skyline of your city with cool skyscrapers.
Check out [ASSET INFO] link above for extended info.