Just an note to anyone using Route-able Open Street Maps.
I am on the Big Island of Hawaii right now and I downloaded the route-able OSM - Hawaii ........to use in conjunction with my 100K Topo.
While OSM looks OK, it obviously must be missing some routing information as it does not seem to recognize small sections of main highways and creates routes in bizarre ways to avoid these small segments of main highways. If you just follow the highway it can cause sufficient confusion that you get a route cannot be determined message and have to start over again after you have passed through that section of highway.
I guess you get what you paid for?
Just a observation for anyone planning on using an OSM..........check out some planned routing on BaseCamp before you get out on the road and have to rely on any OSM.