Unable to answer "How many car lanes does this road have?" – Carrer de l'Historiador Cristòfol Despuig (Residential Road) – https://osm.org/way/362662923 via StreetComplete 57.1:

Dos carriles, uno para cada sentido

Unable to answer "How wide is the road here?" – Carrer de Martorell (Living Street) – https://osm.org/way/927944376 via StreetComplete 57.1:

No hay bordillos, es acera de adoquines de fachada a fachada.

Unable to answer "Which direction leads upwards for these steps?" – Carrer de París (Steps) – https://osm.org/way/82565940 via StreetComplete 57.1:

Es bidireccional

Attached photo(s):
https://westnordost.de/p/202464.jpg