On a recent long road trip I enabled the option to avoid unpaved roads and tolls. Despite this on a couple of occasions the rider 550 directed me down dirt roads unnecessarily. Also I had a specific route that kept directing me through toll roads with the warning that it was "unable to avoid tolls" (or words to that effect). That was clearly wrong as I manually planned a route to avoid tolls. Is there maybe a bug in the software. Note that I had the same problem with a GO6000 so this "bug" might not be model specific.