I find eurovelo incredibly frustrating. It is a great idea but finding details of where the routes go and whether they have been fully established, signposted etc is very difficult. The website isn't really much help.

From what I understand it started with vague ideas of possible routes and then establishing those routes was left to national organisations. Hence the results are patchy. There doesn't seem to be a good resource detailing which routes are usable.

It would be really good if the routes that do exist could be added to the opencyclemap project http://www.opencyclemap.org/ but that hasn't been done yet. Then the routes could simply be copied onto normal maps.