Unable to answer "How many car lanes does this road have?" – Rue du Faubourg Montmartre (Tertiary Road) – https://osm.org/way/58424906 via StreetComplete 58.2:

Une voie bus et une voie normale.

Attached photo(s):
https://westnordost.de/p/234086.jpg
https://westnordost.de/p/234087.jpg