I checked the local Ausway map on street-directory.com.au and the phone booth that's on there is actually there, so based on a massive set of two data points an

I checked the local Ausway map on street-directory.com.au and the phone booth that's on there is actually there, so based on a massive set of two data points and some intuitising in applying typical rates of intentional mistakes applicable to other data, like streets, it's probably only a few phone booths that are intentional mistakes.