Unable to answer "How many car lanes does this road have?" – Passeig Marítim de Rafael Casanova (Residential Road) – https://osm.org/way/333973648 via StreetComplete 58.2:

Left is seawards. From left: foorltpath, 2 xycle lanes, 1 car traffic.

Attached photo(s):
https://westnordost.de/p/226907.jpg