#roads { [zoom > 12] { line-color: #555; line-width: 0.3; } [type='motorway'],[type='motorway_link'] { line-width: 2; } [type='trunk'], [type='trunk_link'] { line-width: 5; } [type='primary'], [type='primary_link'] { line-width: 5; } [type='secondary'], [type='secondary_link'] { line-width: 2; line-color: #222; } }