How the heck does Visitor pathing work?!

[Enkufka]

I've been wracking my brain trying to use the tools I have to set up pathing for my visitors so that they go through the visitor only entrance and go into the visitation area, but it is literally the last place they want to go. I've had them go through the utilities room with staff only doors that they need to wait at until I got rid of an exterior jail door and replaced it with a visitor door. But now it seems that the visitors are doing literally everything in their power to avoid using visitor doors. IDK what the ai is choosing as its methods but I feel like this is the opposite of what it should be. They should prefer visitor doors, not snub them. Anyone have any tips?

Not looking for how to layout a visitor center, I'm specifically looking for tips on how to manipulate visitor pathing.

[The Queen Salis]

experiment with making places "access only" to make all AI avoid pathing through them if they can avoid it

[28rommel]

What I do, is construct my visitation room, right along the road. The visitor door faces the road. Visitors come down the road and enter, and then exit the same door when they're done. This way, they never step inside my prison at all, and can not give prisoners any contraband.