Unable to answer "How many car lanes does this road have?" – Via Francesco Somaini (Residential Road) – https://osm.org/way/25147587 via StreetComplete 58.2:

Single marked lane, but opposite direction.

Attached photo(s):
https://westnordost.de/p/224246.jpg
https://westnordost.de/p/224248.jpg
https://westnordost.de/p/224249.jpg