Part of an event called Sternfahrt where cyclists protest for policy changes by taking over the city on 20 routes covering 2000 km of public roads.
some infos in german: https://berlin.adfc.de/pressemitteilung/adfc-sternfahrt-medienkit
translation to english: https://berlin-adfc-de.translate.goog/pressemitteilung/adfc-sternfahrt-medienkit?_x_tr_sl=de&_x_tr_tl=en&_x_tr_hl=en-US&_x_tr_pto=wapp
Does “fahren” apply here? The German word for bicycle is based on the same word, if I am not mistaken, so probably yes.
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Any kind of vehicle except for heavier than air aeronautical ones. Then it is “fliegen”. With lighter than air aeronautics it surprisingly still is “fahren”.