Unable to answer "Is this a one-way street? In which direction?" – Viale Paolo Toscanelli (Residential Road) – https://osm.org/way/126548914 via StreetComplete 58.2:

This west half of the path is not for cars, both ends ( middle and west side has blockers

Attached photo(s):
https://westnordost.de/p/226062.jpg