Hello, nickvet419!
I'm a Data Curator from the Lyft Mapping team. Thank you very much for your edits and adding new detail on the map! Please, could you clarify, what source did you use for editing?
We found out that some tags in ORD that were added recently are deleted. So I would like to discuss the best way of mapping indoor features in the airport.
According to OSM wiki (https://wiki.openstreetmap.org/wiki/Indoor_Mapping#Tagging_proposals), there are 2 different ways to map indoor facilities:
- highway=corridor - indoor ways, under some previous indoor tagging schemes, and as of 2019 a de facto standard. This tag was used in ORD airport, and it was used correctly. But when we are trying to create the pedestrian route inside the terminals, OSM doesn’t show the route correctly.
- Another de facto standard for mapping (https://wiki.openstreetmap.org/wiki/Guidelines_for_pedestrian_navigation) interior routes is tags combination highway=footway+indoor=yes. In the United States many buildings are mapped with tags highway=footway+indoor=yes, for example: 
example 1 (https://www.openstreetmap.org/edit#map=17/40.75217/-73.97640), 
example 2 (https://www.openstreetmap.org/edit#map=19/34.05617/-118.23598), example 3 (https://www.openstreetmap.org/edit#map=19/39.75322/-105.00006). Also, most airports in the USA are mapped this way: 
example 1 (https://www.openstreetmap.org/way/208889095), 
example 2 (https://www.openstreetmap.org/way/158042008), 
example 3 (https://www.openstreetmap.org/way/545819287), 
example 4 (​​https://www.openstreetmap.org/relation/9313825), 
example 5 (https://www.openstreetmap.org/way/209681674) 
At the end of this page (https://wiki.openstreetmap.org/wiki/Simple_Indoor_Tagging) you can find different examples of mapping indoor features. 
You can also find some useful info here: https://wiki.openstreetmap.org/wiki/Guidelines_for_pedestrian_navigation
In the Simple Indoor Tagging model, pedestrian ways can be added to indoor areas and used by a routing engine.
Our suggestion is to change the tag highway=corridor to highway=footway+indoor=yes for the ways located inside the airport building. We won’t change the geometry of the ways you added, but we need to change tag value for main footways in the terminals for correct routing. OSM routing doesn't include in route ways with tag highway=corridor, so the highway=footway+indoor=yes will allow to show the correct route for pedestrians.
Thank you for your edits.
