When driving through Europe, Waze avoids highways even when the option "avoid toll roads" is turned off (it should use toll roads). Each country has a different vignette. Travelling a 5h car ride from Crostia to Austria can take you through Slovenia or Hungary. To use highways you need to add the Vignette for Austria, Hungary, and Slovenia. That takes time and is confusing and inconvenient.

Solution: when "Avoid toll roads" is disabled, take any road a typical car would drive, including all vignettes you buy in that country. Assume the driver will buy them. Give infos about tolls and vignettes in the route description.