Behodar:
Now I'm not sure whether the car and I both missed an 80 sign after the twisty bit, or whether the speed limit is actually different in the other direction.
Speed limits in NZ apply to both directions of a particular piece of road. You cannot have (e.g.) a 30kph limit in one direction and an 80kph in the other. I gather that there has been/are efforts to change this, but it's been on the legislative back burner for at least a couple of years.

