Today I fixed a lot of ways around the Grabkapelle. Source was my memory (I used to live around there). Most of the path's around there have been tagged as cycleway which was wrong. They are shared pedestrain and bicycle path'. I tagged them as suggested at osm.wiki/DE:Germany_roads_tagging#Fu.C3.9F-_und_Radweg.
I learned about this problem when I tried to do a predestrian routing in that area.
Also I added some paths around the Konrad Adenauer Ring.