Coming from Sydney, and I have not heard of these!
I find open spaces like this rather boring -there is little to see and nothing to do.
I would far rather drive through the country where there are trees, shade and some beauty.
I'm with you! Also I come from Sydney and I haven't heard of it either.
Yes, have driven through the Hay Plains a number of times - I alway say the same thing, omg, i wish I could slice this country in 2, and take out a l000km - it's toooo big. NZ size is just right to me.
On one occasion, it was green, with fog swirling around - quite magic.
I admire the people who live out there. Us city types seem to think a bus/train that is 5 mins. late is a crisis in our lives.