border decay flake keep off non public off limits own paint post privat private secluded sign trespassing wood wooden blue defence defend defense deter deterrence keep metal off point roof safe secure security sharp sky spike spikes vandal vandalism access-limited behave behavior behaviour communicate communication denied keep-off limited-access members membership not-allowed not-permitted permission-denied prohibited prohibition prosecution restricted restriction restrictions safety warning activity countryside Cross-country cycle cycling cyclist destination direction energy England exercise February fence field goal Great Britain journey keep-fit landscape leisure mountainbike off-road path ride snow snowy South Downs sport Sussex track travel winter access-denied advice alert appropriate-behavior appropriate-behaviour chain chained chained-off entry-denied entry-prohibited keep-out no-access no-entry unauthorised unauthorized black directions red trespass white