I wouldn't go quite as far as saying you're stuffed. You'd certainly be in 'a spot of bother', but that would be no different to arriving in a suburban street and not knowing which way the numbers are going. Once you see the first address, you know how far along the road you are, (from the start), and once you see the second address you'll know which way the road is going. (and hence be able to work out where you need to go, and how far away it is).
The difference between city and country though is distance - you may have to travel 5KMs before you find out you're going the wrong way...
Yes Indeed, And of course, whether you are going the right way out of town.
For example, 15 Kangarilla Rd, McLaren Flat exists on both the McLaren Vale & Kanga sides of the Flat.
Of course, the caller who knows they are travelling between Kanga & Willunga via McLaren Vale just knows it's the Kangarilla Rd, between McLaren Vale & Kanga & they are outside #15. By my calculations, that probably exists at 4 locations - 1.5km East of McL Vale, 1.5km East and west of McL Flat, and 1.5km west of Kanga.
A giant step forward, that !!
This is most likely to occur on these main roads, because they carry the majority of out-of-towners. The little local roads are mostly only trafficked by locals who know exactly where they are & where they relate to. Out-of-towners are unlikely to even know the name of these back roads to report emergencies...
Rural property addressing is very different from city street addressing, except in a few odd instances of long main roads where the numbering stops & starts again. Give me a GR any day !
cheers