when I load a way point tour with perhaps a way point on a highway and highways are disabled in routing setting, the routing will be resulted in very obscure directions. I think there could be two solutions for that.
Get a message that a way point is on an on an street that is not allowed or route to the not allowed way although it is disabled without that obscure directions.
A street is a public thoroughfare in a built environment. It is a public parcel of land adjoining buildings in an urban context, on which people may freely assemble, interact, and move about. You can also, check freepsncodes for more information.