Hello and welcome to OpenStreetMap!

I've reverted these changes. Road classifications in OSM are mostly vague and debatable, but motorway is an exception. Generally a motorway is a divided, high-speed, fully grade-separated road with no sidewalks over a long distance, usually ending in an interchange with another motorway. Other road classifications are generally assigned by mappers' impressions of their importance. Naito Parkway might pass for a trunk, but in my experience it doesn't get as much traffic as Ross Island Bridge so I think primary is most appropriate.

Also bicycle=discouraged is intended for roads with signage that officially discourages bicycles. As inadvisable is it may be to ride a bike here, there's no signage as far as I'm aware.

I recommend reading the wiki page for any tag you're unsure is appropriate. If you have any questions, you can ask on the official forum or unofficial discord channel.

https://wiki.openstreetmap.org/wiki/Tag:highway%3Dmotorway

https://wiki.openstreetmap.org/wiki/Tag:bicycle%3Ddiscouraged

https://community.openstreetmap.org

https://discord.com/invite/openstreetmap