Originally Posted by
downtube42
County maps used to show road surface - dirt, gravel, pavement. Maintained by the people who maintained the road surface. I don't find that information consistently and accurately available on any mapping software.
Iowa's DOT website has maps of every road in the state broken down into interstates, us/state highways, county roads, maintained gravel roads, unimproved level b roads, etc.
downloadable and easy to read. I am sure other states have something similar.