text: According to the map of the city Cologne, the Umweltzone extends to the north,
  Current Umweltzone in OSM:
  https://www.openstreetmap.org/relation/7926895#map=11/50.9461/6.9241
  
  Current zone according to the city:
  https://www.stadt-koeln.de/mediaasset/content/pdf57/erweiterung_gr%C3%BCne_umweltzone.pdf