This is in no way highway=unclassified. These are all agricultural roads, so highway=track. See https://bb-viewer.geobasis-bb.de/?layerIDs=291-bg,9001,9000,159&visibility=true,true,true,true&transparency=0,0,0,0&center=453000.42280404567,5769824.8131555375&zoomlevel=9

streckenkundler