When road type "unpaved" is incorrect on maps the routing can also be incorrect. Since unpaved roads are not indicated on maps, the user does not know what part of a route uses unpaved roads and is unable to make intelligent choices. Further, it's hard to figure out the reason for routing errors caused by wrong road type, and very unlikely these errors get reported. I suggest the map display include indication of unpaved roads (either by colour or dashes) to help prevent these issues.
Please make it easier for us to help correct map errors.