Index: trunk/resources/data/validator/combinations.mapcss
===================================================================
--- trunk/resources/data/validator/combinations.mapcss	(revision 18103)
+++ trunk/resources/data/validator/combinations.mapcss	(revision 18112)
@@ -721,5 +721,5 @@
 
 /* see #17623 */
-way:areaStyle[highway][highway =~ /motorway|trunk|primary|secondary|tertiary|unclassified|residential|service$|living_street|pedestrian|track|path|footway|cycleway|bus_guideway|bridleway/][area!=yes] {
+way:areaStyle[highway][highway =~ /motorway|trunk|primary|secondary|tertiary|unclassified|residential|service$|living_street|pedestrian|track|path|footway|cycleway|busway|bus_guideway|bridleway/][area!=yes] {
   throwOther: tr("A linear object {0} without {1} has a tag indicating that it is an area.", "{1.tag}", "{3.tag}");
   group: tr("suspicious tag combination");