Index: trunk/data/validator/combinations.mapcss
===================================================================
--- trunk/data/validator/combinations.mapcss	(revision 11052)
+++ trunk/data/validator/combinations.mapcss	(revision 11074)
@@ -217,9 +217,15 @@
 }
 
-/* #11127 */
-way[waterway][bridge=yes] {
+/* #11127, #13727 */
+way[waterway][bridge=yes][waterway!=weir] {
   throwWarning: tr("{0} together with {1}", "{0.key}", "{1.tag}");
   suggestAlternative: "bridge=aqueduct";
   fixAdd: "bridge=aqueduct";
+}
+way[waterway=weir][bridge=yes][highway] {
+  throwWarning: tr("{0} together with {1}", "{0.tag}", "{1.tag}");
+  suggestAlternative: "waterway=weir + ford=yes";
+  suggestAlternative: "waterway=dam";
+  suggestAlternative: tr("two objects, one with {0} and one with {1} + {2} + {3}", "{0.tag}", "{2.key}", "{1.tag}", "layer");
 }