Wouldn't this just add to the confusion of giving directions by numbers? Tourists will start getting all levels of lost if you send them off exit 8, without realising that a new exit now exists between 7 and 8, so exit 8 is now exit 9, and the new exit 8 leads somewhere else entirely. At least by saying "take the Airport exit" you'll send them to the airport, regardless of whether its exit number 8, 9, 12 or 67. This Vic Roads idea is the same as our M3 here where the exit number refers to the kilometres away from the CBD. This is why there was the joke about adding an exit between two of them. So in the case of the above, exit 8 will always be exit 8. Refers to the amount of KM's away from the CBD Are you 100% sure about this? I'm sure it's actually just a count down rather then how many KM's left. Wouldn't this just add to the confusion of giving directions by numbers? Tourists will start getting all levels of lost if you send them off exit 8, without realising that a new exit now exists between 7 and 8, so exit 8 is now exit 9, and the new exit 8 leads somewhere else entirely. At least by saying "take the Airport exit" you'll send them to the airport, regardless of whether its exit number 8, 9, 12 or 67. lol, well it's not like building a new exit is a daily occurrence so being confused is highly unlikely.