Thats just PS trying to make the game fun by making the road incredibly hard to see. Oh, and if you have the default settings you may have noticed that mountains and stalactites in the distance just pop in and out of existance. Im sure if you asked the team about this they would tell you that this is acceptable...
Tweak the details section of your settings so that instead of having adaptice distance set to 200, you have it set to manual, 1000. I dont recall the exact verbage ... but is the adaptive distace set so low that causes distant objects to be chopped out.
Try asking someome to show you the way. As a rule of thumb, communicating with other players ICly will work better than trying to figure out stuff on your own ... its also encouraged.