Unnecessary diversion to side streets

🚧 THIS IS A TICKET MIGRATED FROM UPVOTY. The original ticket and comments will be available for a limited time over at:
https://abrp.upvoty.com/b/report-a-bug/unnecessary-diversion-to-side-streets/
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If you navigate from Nürtingen to Tübingen in Germany, the app always wants to divert you from the main road to some windy back roads which are a longer distance and take longer than the main road.