Re: Worldwide routable Garmin maps: URL REMOVED

What program or device are you using? I think Mapsource should be able to calculate your routes but latest BaseCamp has a bad routing, not suitable for OSM at all.

I'm experimenting with routing network in Poland. I have set class 4 for following roads:
motorway and motorway_link
trunk, trunk_link
primary and primary_link with valid int_ref
primary and primary_link for selected national roads
roundabouts with above road types

With these settings I can get working routing across whole country. I think that other countries could have other requirements, depending on their roads network, since too many roads with class 4 is a wrong solution too.