Unable to answer "What type of recycling facility is this?" – Recycling – osm.org/node/4498289321 via StreetComplete 58.2:

These aren't recycling containers, they're clothes donation points for Hjálpræðis Herinn (Salvation Army).

Unable to answer "Does this crossing have markings on the ground?" – Crossing – osm.org/node/6583896209 via StreetComplete 58.2:

The parking isle doesn't go across Himnastiginn here, it stops on either side.