Unable to answer "Is this a one-way street? In which direction?" – Rue du Bourg Neuf (Residential Road) – https://osm.org/way/66676587 via StreetComplete 58.2:

La route est interdite à la circulation des véhicules. Un poteau est fixé au milieu de la route.

Attached photo(s):
https://westnordost.de/p/234471.jpg