OpenStreetMap data obtained from:
https://download.geofabrik.de

processing / preparation

osmosis --rb file=germany-2021-07-09.osm.pbf --tf accept-ways highway=motorway,motorway_link,trunk,trunk_link,primary,primary_link,motorway_junction --used-node --wb germany-2021-07-09_coarse.osm.pbf

osmosis --rb file=germany-2021-07-09_coarse.osm.pbf --rb nordrhein-westfalen-2021-07-09.osm.pbf --merge --wb germany-coarse_nordrhein-westfalen-2021-07-09_merged.osm.pbf