Index: trunk/data/validator/numeric.mapcss
===================================================================
--- trunk/data/validator/numeric.mapcss	(revision 7998)
+++ trunk/data/validator/numeric.mapcss	(revision 8700)
@@ -81,6 +81,7 @@
   assertNoMatch: "way maxwidth=7 ft";
 }
-
-way[maxspeed][maxspeed !~ /^(signals|none|unposted|unknown|variable|walk|[1-9][0-9]*( [a-z]+)?|[A-Z][A-Z]:(urban|rural|living_street|motorway))$/] {
+way[maxspeed][maxspeed !~ /^(signals|none|unposted|variable|walk|[1-9][0-9]*( [a-z]+)?|[A-Z][A-Z]:(urban|rural|living_street|motorway))$/],
+way[maxspeed:forward][maxspeed:forward !~ /^(signals|none|unposted|variable|walk|[1-9][0-9]*( [a-z]+)?|[A-Z][A-Z]:(urban|rural|living_street|motorway))$/],
+way[maxspeed:backward][maxspeed:backward !~ /^(signals|none|unposted|variable|walk|[1-9][0-9]*( [a-z]+)?|[A-Z][A-Z]:(urban|rural|living_street|motorway))$/] {
   throwWarning: tr("unusual {0} format", "maxspeed");
   assertMatch: "way maxspeed=something";