6
"bicycle"=>"no","foot"=>"yes","motor_vehicle"=>"no","piste:difficulty"=>"advanced","piste:grooming"=>"classic+skating","piste:name"=>"6","piste:oneway"=>"yes","piste:ref"=>"6","piste:type"=>"nordic","segregated"=>"no","surface"=>"gravel","width"=>"3"