Index: trunk/styles/standard/elemstyles.mapcss
===================================================================
--- trunk/styles/standard/elemstyles.mapcss	(revision 7255)
+++ trunk/styles/standard/elemstyles.mapcss	(revision 7257)
@@ -88,5 +88,5 @@
     opacity: 0.5;
 }
-way[tunnel?]::core_tunnel {
+way[tunnel][!tunnel?!]::core_tunnel {
     object-z-index: -1;
     width: +5;