-footpath: highway=footway,foot=yes
-bridleway: highway=bridleway,foot=yes
-byway: highway=unsurfaced,foot=yes
-permissive path: highway=footway,foot=permissive
+public footpath: highway=footway,foot=yes,tracktype=
+permissive path: highway=footway,foot=permissive,tracktype=
+bridleway: highway=bridleway,foot=yes,tracktype=
+paved track: highway=track,foot=,tracktype=grade1
+gravel track: highway=track,foot=,tracktype=grade2
+rough track: highway=track,foot=,tracktype=grade3
+dirt track: highway=track,foot=,tracktype=grade4
+grass track: highway=track,foot=,tracktype=grade5