Why Do you need to buy this 3D model ?
I modeled these streets and roads to be use in any exterior scene, game, render composition. It comes with many ways of use in other projects with good topoligy and not destructive modelling to be easy to modifie the mesh and in the doc files such Blender and Unity it comes with material.
Bonus: It comes with white and yellow options, more the alpha versions to be use in other places and textures streets.
And the objects have proper pivot points locations to make it easy and precise to put in any place.
Resume everything, you are going to buy It's a model that can be use and reused and It will fits in anything that you make it without trouble and saving thousands of time.
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I hope you enjoy and for any problems, wishs or questions just contact me in the comments.