Dear community,
the marker indicates a road that is located on private property. The problem is that some algorithms in OSM.org (GraphHopper) use this path to navigate to the address "Steuben-allee 29", which is inaccessible from the east! In addition, OSM.org displays a warning that this is an "area with limited entry" when navigating this way. 
This road should not be part of the database used by osm.org's navigation algorithms or third-party programs built on top of osm.org.
marker indicates a road that is located on private property. The problem is that some algorithms in OSM.org (GraphHopper) use this path to navigate to the address "Steuben-allee 29", which is inaccessible from the east! In addition, OSM.org displays a warning that this is an "area with limited entry" when navigating this way. 

This path should not be part of the database used by osm.org's navigation algorithms or third-party programs built on top of osm.org. 
The consequence of this problem when navigating from the A27 is an incorrect route calculation in the destination section of several kilometres!!
For correcting this, thanks in advance!