An OpenStreetMap-based routing engine would've given you the same directions. At least the graphhopper one https://www.openstreetmap.org/directions?engine=graph

An OpenStreetMap-based routing engine would've given you the same directions. At least the graphhopper one https://www.openstreetmap.org/directions?engine=graphhopper_car&route=38.5738%2C-109.5462%3B38.8221%2C-108.5963 https://www.openstreetmap.org/directions?engine=graphhopper_... Let's have a look OpenStreetMap has both roads as highway=tertiary, surface=dirt https://www.openstreetmap.org/way/364758018 https://www.openstreetmap.org/way/364758018 https://www.openstreetmap.org/way/364758017 https://www.openstreetmap.org/way/364758017 Surface=dirt has this fitting example photo in the documentation https://wiki.openstreetmap.org/wiki/File:Transportation_in_Tanzania_Traffic_problems.JPG https://wiki.openstreetmap.org/wiki/File:Transportation_in_T... (linked on https://wiki.openstreetmap.org/wiki/Key:surface https://wiki.openstreetmap.org/wiki/Key:surface) I'd argue it should be highway=track https://wiki.openstreetmap.org/wiki/Tag:highway%3Dtrack https://wiki.openstreetmap.org/wiki/Tag:highway%3Dtrack with possible smoothness=bad https://wiki.openstreetmap.org/wiki/Key:smoothness https://wiki.openstreetmap.org/wiki/Key:smoothness but it's always tricky depending on country.