code: @Pure
  	public static int getPreferredLaneCount() {
  		final Preferences prefs = Preferences.userNodeForPackage(RoadNetworkConstants.class);
  		if (prefs != null) {
  			return prefs.getInt("LANE_COUNT", DEFAULT_LANE_COUNT); //$NON-NLS-1$
  		}
  		return DEFAULT_LANE_COUNT;
  	}
docs: Replies the preferred number of lanes for a road segment.
  
  @return the preferred number of lanes for a road segment.
  @see #DEFAULT_LANE_COUNT