Unable to answer "How many car lanes does this road have?" – Passeig Marítim de Rafael Casanova (Residential Road) – https://osm.org/way/42507939 via StreetComplete 58.2:

This is the road profile. Leftmost lane cars, one way, coming to us one way traffic. The two way bicycle path. Then sidewalk on sea side.

Attached photo(s):
https://westnordost.de/p/226906.jpg