I have a suggestion for the development of the program.
In Hungary, you can expect county (county) highway stickers. It is not mandatory to purchase a highway sticker for the entire country. It would be a useful function if it were possible to mark in the program which toll roads of the given country the user is allowed to use. For example, if I have a sticker for the counties of Pest, Heves, Borsod-Abaúj Zemplén and Hajdú-Bihar, I could use these sections of the M3 and M35 when going to Nyíregyháza, but before entering the county of Szabolcs-Szatmár-Bereg, the navigation would switch to non-toll roads. With this, the user would be able to enjoy his purchased stickers, but the GPS would not take him on roads for which he does not have permission.