"w highway=track,tracktype=grade3 track_unpaved\n"
"w highway=track,tracktype=grade4 track_ground\n"
"w highway=track,tracktype=grade5 track_grass\n"
+ "w highway=track,surface=paved,tracktype=grade1 track_paved\n"
+ "w highway=track,surface=gravel,tracktype=grade2 track_gravelled\n"
+ "w highway=track,surface=unpaved,tracktype=grade3 track_unpaved\n"
+ "w highway=track,surface=ground,tracktype=grade4 track_ground\n"
+ "w highway=track,surface=grass,tracktype=grade5 track_grass\n"
"w highway=unsurfaced track_gravelled\n"
"w highway=steps steps\n"
"w historic=archaeological_site poly_archaeological_site\n"