Index: trunk/data/validator/combinations.mapcss
===================================================================
--- trunk/data/validator/combinations.mapcss	(revision 15413)
+++ trunk/data/validator/combinations.mapcss	(revision 15414)
@@ -630,2 +630,8 @@
   fixAdd: "emergency=emergency_ward_entrance";
 }
+
+/* #18203 */
+way[construction][construction!=yes][highway][highway!=construction] {
+  throwWarning: tr("{0} together with {1}", "{2.tag}", "{0.tag}");
+  group: tr("suspicious tag combination");
+}