Unable to answer "How many car lanes does this road have?" – Novorossiysk Road [B3432] (Secondary Road) – https://osm.org/way/25680816 via StreetComplete 62.0:

Merge in turn, has two lanes initially plus bus layby, ends in one, last paint before the end of island

Attached photo(s):
https://streetcomplete.app/p/319709.jpg