Sorry I didn't explain my note very well as I was typing on the go, and I'm not sure how to undelete https://osm.org/way/67252417 but the remaining mapped path ( https://www.openstreetmap.org/way/67252408 ) is the ramp. However there are also stairs, which were where 67252417 was mapped, by they also go South and then North just tighter than the ramp. You can see them on iD on the Bing Maps Aerial imagery appearing to the west of the ramp level with the top of the building as a landing and you can just about make out the rest of the staircase and middle landing if you look carefully.