Resting and Servicing on highways

Hello everybody,

why are there so little highway=rest_area and highway=services in OGF? The people have to travel vast distances (Especially truck drivers) and yet they don't have a good place to relax for a bit or go to the toilet...

See also:

• http://wiki.openstreetmap.org/wiki/Tag:highway%3Dservices
• http://wiki.openstreetmap.org/wiki/Tag:highway%3Drest_area