Unable to answer "What surface does this road have?" – Route de Marcillac à Carcenac-Peyralès [D 57] (Secondary Road) – https://osm.org/way/234756264 via StreetComplete 58.2:

Deux parties différentes en largeur. Asphalte et béton.

Attached photo(s):
https://westnordost.de/p/233762.jpg