A "planned_road_visited " should be the color of the road already driven past. The road behind the vehicle. This is what OP wants to change. And "schemes" are not only stored in scheme directory (it can be in other location; so tracking it down can be tedious) A "planned route" may or may not be same (or similar color) as the roads, it depends on the schemed being used. But then the question wasn't about "planned route", it's about "visited route."
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