Map of German transport associationsAbbreviations are explained in this list of German transport associations too.
Maximilian Dürrbecker, recreated and updated in SVG by Noah Jalowski
Karte der Landkreise: TUBS, CC BY-SA 3.0Verkehrsverbünde: Maximilian Dörrbecker (Chumwa), NJ Giggie, CC BY-SA 4.0