I'm looking for an app where I can define roads it should not use, in order to avoid some legal to cycle but quite dangerous spots.

The apps I found are either (a) fully manual pathfinding or (b) fully auto pathfinding where I can add additional stops, but not substract dangerous locations.

Do you know any like that? What navigation apps do you use?

Thanks 🚴‍♀️🚴‍♀️🚴‍♀️🚴‍♀️