osm.wiki/Relation:route

I noticed that relations appear to be a much better method for tagging routes such as numbered highways, etc.; but these routes do not render in mapnik and T@H yet. Cycleways partially render on the Cycleway map, but do not include symbols.

Could we start rendering route relations with the symbols, so numbered routes are more easily tagged than tagging each member way individually, and so refs appear with the proper symbols instead of the generic squares when available?