https://assetstore.unity.com/packages/2d/textures-materials/roads/easyroads3d-pro-add-on-hd-roads-118774?aid=1101liE5D
EasyRoads3D Pro Add On - HD Roads | 2D Roads | Unity Asset Store
add onprohdroadsunity
https://assetstore.unity.com/packages/tools/terrain/easyroads3d-pro-v3-469?aid=1101lGxc&pubref=REB
EasyRoads3D Pro v3 | Terrain | Unity Asset Store
proterrainunityassetstore