It’s not the majority, but Berlin has ~150km of bicycle paths on sidewalks: https://web.archive.org/web/20080922140453/http://www.stadtentwicklung.berlin.de/ver

It’s not the majority, but Berlin has ~150km of bicycle paths on sidewalks: https://web.archive.org/web/20080922140453/http://www.stadtentwicklung.berlin.de/verkehr/radverkehrsanlagen/en/radwege.shtml https://web.archive.org/web/20080922140453/http://www.stadte... When I was there, I kept walking in the bike lane by accident and ended up upsetting some cyclists.