Working with game Tools

Hello, I have a question. If it’s not difficult for you, explain how I can get material from the drag racing track, on the map “West Coast, USA”, and use it in the “Terrain Tools” tool.
It is also not clear to me which tool is used to mark the road, because the “Mesh Road Editor/Decal Road Editor” tools do not have these decals at all. Thank you in advance.