Unable to answer "How does this path cross the barrier here?" – osm.org/node/2513851940 via StreetComplete 61.2:

Modulare Barriere, nur bei Hochwasser eingebaut, sonst frei zugänglicher Durchgang

Unable to answer "What’s the surface here?" – on bridge: Path – osm.org/way/140414802 via StreetComplete 61.2:

Gitter aus Metall

Attached photo(s):
https://streetcomplete.app/p/293663.jpg

Unable to answer "Who is allowed to park here? Parking may be free or paid." – Parking Lot – osm.org/way/324310129 via StreetComplete 61.2:

Fläche ist kleiner, dient als Wendeplatte

Attached photo(s):
https://streetcomplete.app/p/293611.jpg