You need to adjust the software a more carefully.

Spoiler: some screenshots
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Don't pay attention to the look of the software, it's the same version, I just added the skin I'm testing at the moment

- you adjust the vehicle parameters yourself (max speed on highway, local roads...)
- turn off the use of the online service
- The quality of the map and their accuracy the story is for itself. Try another provider (TomTom).

By the way, don't pay too much attention to the trip duration predicting, it's just there to point out the time frames and route differences.

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