text: in this area are a lot of crazy things
   barrier=... or 
  barrier=hedge over stream
  or things looking like an arrow with created_by=JOSM tag on it
  or barrier=wood_fence
  and way with onlt tracktype=grade5
  http://www.openstreetmap.org/way/8020488
  http://www.openstreetmap.org/way/4000024
  http://www.openstreetmap.org/node/101883422
  http://www.openstreetmap.org/way/8020922
  http://www.openstreetmap.org/way/22677010