I re-surveyed the area in person two weeks ago, and entered another note with my findings:  https://www.openstreetmap.org/note/4066662  Today I checked that note against the OSM database and it appears that the database is accurate (there are 4 lanes marked on York Ave in each block between 60th and 63rd).  So this discussion should be closed.  (I don't know how to do that.)