mostlytossas
A number of years ago, it was the practice to put balls on the few lines crossing the Stuart Highway. The practice was dropped due to cost cutting.
Its not uncommon for outback roads to be turned into temporary runways for medivacs. You will be aware there are sections actually designated as emergency RFDS strips, some including piano keys at each end.
I have to stand corrected on my earlier statement that they hit the only line within a few hundred kilometres.
There's also a triple line crossing the highway a few kilometres to the north. Talking to a sparky who's worked on them, they're the only two lines across the highway in a 700km stretch. Not too expensive to have strung a few balls.