Hello yelisey90, thanks for reaching out.

The layer=* tag is typically used when features intersect at different vertical levels, for example: bridges, tunnels, or stacked roads. It helps clarify their spatial relationship when they cross over or under each other (https://wiki.openstreetmap.org/wiki/Key:layer).

In this case, I applied the covered=yes tag since the service road passes through a building rather than above or below it, following the guidelines outlined in the Key:covered wiki (https://wiki.openstreetmap.org/wiki/Key:covered ). I removed the layer=1 tag as the same page notes that “Ways passing through buildings should normally have the same (or none) layer as the building.”. I Hope this helps clarify the intention behind this edit more.

Thanks again and happy mapping!