Unable to answer "What surface does this road have?" – Melanchthonstraße (Residential Road) – https://osm.org/way/1416341731 via StreetComplete 63.1:

Ganze straße halb asfaltiert. fahrspur hat asfalt, is aber mehr schlecht als recht .

Attached photo(s):
https://streetcomplete.app/p/342472.jpg
https://streetcomplete.app/p/342473.jpg
https://streetcomplete.app/p/342474.jpg