Unable to answer "How wide is the road here?" – 12th Avenue (Living Street) – https://osm.org/way/369609106 via StreetComplete 58.1:

No clear curb present. The sides are typically used by pedestrians and there are poles to block vehicles from veering. But this is a mixed mode area.

Attached photo(s):
https://westnordost.de/p/223189.jpg