Road/Terrain?

Hey guys! Noob here
This may seem like kind of a basic question, but how do you get the roads to stick to the terrain? I'm working on a route, and i try to put roads going uphil, and it just puts them straight through the mountain. Any help?
PS: Mods/admins, I do apologize if this is in the wrong section/thread.
This may seem like kind of a basic question, but how do you get the roads to stick to the terrain? I'm working on a route, and i try to put roads going uphil, and it just puts them straight through the mountain. Any help?
PS: Mods/admins, I do apologize if this is in the wrong section/thread.