Tagged with `access=private`.

https://wiki.openstreetmap.org/wiki/Tag:access%3Dprivate

OSM allows mapping private visible/verifiable roads such as driveways, we just have to tag them as private. These can be useful for emergency access, deliveries, knowing where properties access roads, etc.

https://wiki.openstreetmap.org/wiki/Limitations_on_mapping_private_information