Please use the roles 'forward' and 'backward' if you create routes that don't follow the same ways in both directions. And check that all the ways are nicely connected and in the right order. JOSM is a great tool to create routes. Read osm.wiki/Relation:route if you're not sure how to do it right.

I wrote a small script that converts a single osm relation of ways into a kml. That lets you view routes in google earth or google maps. It doesn't work with super-relations but it should work well with roles. Check it out: http://www.jrq.ch/osmrelations/