Today's fun with OpenStreetMap and route planners: A route planner for Denmark that refuses to drive on roads named after men.
About 40,000 Danish roads (= 35 % af all Danish roads) have been tagged with name:etymology:wikidata to tag into Wikidata's structured content.
Other ideas for funny restrictions? Roads named after politicians of specific political parties? Roads named after royals? (¡Viva la revolución!) Roads named after Swedes?