Thanks for your reply. I try to be more specific. I assume planned_road is the route I should travel, therefore it‘s highlighted with a Color to separat from the other Roads. So far so good, no complain about that.
But what is planned_road_visited? I assume it‘s the planned road that I have already travelled. Is that true? If so the color of the road behind the car should change to what I set planned_road_visited to. But whatever Color I Set, there is no effect. The visited road has the same Color as the road ahead.