Any history on how this was designated as a bicycle route? I don't see any indication for how this is appropriate.

Road blocked by large boulders, intentionally
No car passage

via StreetComplete 54.0

Unable to answer "How are the footpath and bicycle path laid out here?" – Crossing With Pedestrian Signals – way/1283023754 via StreetComplete 58.2:

there isn't a bike path this way

House named "Villa del Lago"

via StreetComplete 59.3

Does this railway actually cross the road and have any presence (rails, ties, etc.), or should it be removed because it is completely gone?

way/1336359086

Unable to answer "What kind of building is this?" – house number 5109-5111: Building – way/162472680 via StreetComplete 60.2:

This is a rehab building

Unable to answer "How many car lanes does this road have?" – Gold Line Busway (Busway) – way/1202091815 via StreetComplete 60.3:

Bus way not for cars.

Does this building need to be a relation here? There is no building=*

Is "Historic Stair" the actual name?

way/155193038

Seems descriptive

Parking meters here along this side of building