code: @Pure
  	public static boolean getPreferredRoadInternDrawing() {
  		final Preferences prefs = Preferences.userNodeForPackage(RoadNetworkLayerConstants.class);
  		if (prefs != null) {
  			return prefs.getBoolean("ROAD_INTERN_DRAWING", DEFAULT_ROAD_INTERN_DRAWING); //$NON-NLS-1$
  		}
  		return DEFAULT_ROAD_INTERN_DRAWING;
  	}
docs: Replies if the internal data structure used to store the road network
  may be drawn on the displayers.
  
  @return <code>true</code> if the internal data structures may be
  drawn on the displayers, otherwise <code>false</code>.