[laumars]

Maybe it's not a thing any more? Or maybe it's not as clever as scanning multiple frequencies? I've not listened to analogue radio in the car for long distances in a while but I do remember there used to be a big problem with national radio spanning multiple different frequencies and your signal would drift out as you changed regions. This problem seemed to solve itself when RDS and "smart" radios started becoming a thing. However my experience is with video broadcasting rather than radio so I might have gotten some of the details wrong.