|access = private|
|The way is not to be used by the general public.|
|Used on these elements|
|Status: In use|
|Tools for this tag|
|This article is a stub. You can help OpenStreetMap by expanding it.|
The access=private tag is generally used in combination with the road network tags to indicate that the road is not to be used by the general public.
Usually used for Private driveways (in the city) and country lane ways, where the road just leads to a private home. Routing programs would be able to detect this tag, and knows to avoid these roads when routing.
The alternate tags to ensure that ways are actually public would be access=yes for roads and motor_vehicle=yes for motorways. But those tags are only useful if needed to override the national traffic laws which OSM obeys generally.