next time please make it more clear what needs to be done.  "Track Road" appears to be a generic name which are highly discouraged and without clear notes it's difficult to understand intent.  Road types do not imply any sort of access - it only tells what kind of vehicles it was expected to carry, and as you said a 4WD car versus a pedestrian - it should be a track road.
The road has been marked as "permissive" access and that was never changed - and by the sound of your note this is wrong and should be private - but is this really?