#roadbed  a bed supporting a road
  supertype:  #bed.understructure  a foundation of earth or rock supporting a road or railroad track; "the track bed had washed away"
  part of:  #route
  part:  #traffic_island__trafficisland__safety_island__safety_isle__safety_zone  an island area in a roadway from which traffic is excluded; provides safe area for pedestrians

No statement uses or specializes #roadbed; click here to add one.