Your comment caught my eye, because I usually hear population density being used to explain why Australia's internet isn't as good as elsewhere.
I'm certainly no expert on the topic, but I haven't heard any news about any major problems with Australia's roads. I'm curious to know how they compare with roads in the US.
USA density: 33.7/km2 87.4/sq mi population: ~ 314 mil
AUS density: 2.8/km2 7.3/sq mi population: ~ 22 mil