Tagging tunnel=building_passage on highway [1] seems wrong given the situation depicted in [2] and also in violation of the definition in [3] as [4] is tagged as man_made=bridge. I suspect it only exists for rendering purposes, which might contradict OSM guidelines/principles of good practice [5].

[1] https://www.openstreetmap.org/way/785292271
[2] https://en.wikipedia.org/wiki/File:Seattle_skyway_6th_and_pine.jpg
[3] https://wiki.openstreetmap.org/wiki/Key:bridge
[4] https://www.openstreetmap.org/way/362635170
[5] https://wiki.openstreetmap.org/wiki/Tagging_for_the_renderer

If you think I am mistaken or do have an idea how this case of a skybridge/skyway can be tagged even better / differently, please let me know, as I am currently involved in a similar discussion (in German, s. note https://www.openstreetmap.org/note/2569602 )
