We got holes in QLD like that , but we call them opencut mines.................
You may need one of these to ride that road http://www.youtube.com/watch?v=tzCXYftR3oo
After the floods this year there were actually holes that BIG on Goat Track No1 (HWY 1)
And wozza I'd duck if I was you........I think something is flying in your direction