Unable to answer "How many car lanes does this road have?" – Kurt-Schumacher-Straße (Secondary Road) – https://osm.org/way/321467359 via StreetComplete 63.0:

Nördlichen eine Spur  in jede Richtung, Mittelinzel. Südlich Abbiegespur nach Westen

Attached photo(s):
https://streetcomplete.app/p/333783.jpg
https://streetcomplete.app/p/333784.jpg