#road, #bridge, #tunnel {
  
  // casing/outlines & single lines
  ::case {
    [class='main'] {
      #bridge { line-color: purple; line-width: 5; }
      }
  }
  
  // fill/inlines
  /*::fill {
  [class='motorway'] {
    line-color: @owner;
    line-width: 2;
    line-cap: round; line-join: round;            
    }
  [class='main'] {
      line-color: @admin;
      line-width: 1.75;
      line-cap: round; line-join: round;      
    }
  [class='street'] {
    line-color: @guest;
    }
  [class='service'],[class='street_limited'] {
    line-color: @rtsidepanel;
    line-width: .5;
    }
  [class='path'] {
    line-color: @starred;
    line-width: .5;
    line-dasharray: 1,3;
    }
  [class='major_rail'] {
    line-color: @warn;
    }
    }
*/
    }