Website with bicycle only paths in Europe? Does anyone know of a website that has a map of bicycle paths in Europe that are bike/walkers only, i.e. no cars?
OpenStreetMap (a collaborative project to create a free editable map of the world) has a very up to date and accurate cycle route layer available. I have used it before in Europe to plan large trips.  There are also lots of online add-on services that allow you to use the cycling OpenStreetMap to plan cycling routes and run them either on smart phones or on GPS cycling computers. Garmin has even used the service to create the specialized maps on their Edge GPS cycling computers. 

Some example services include:


BikeRouteToaster
Garmin Connect
... more to come (or add them in the comments)


As a side note, other proprietary services such as Google maps also have good (and constantly improving) cycling maps.  I however personally find OpenStreetMap is a little more up-to-date and accurate, likely due to the fact anyone can submit a fixes and new pathways.