Driving back from Killarney monday evening I saw:
- one echidna. It walked slowly across the road and I braked and waited until it had finished passing.
- some rabbits
- lots of frogs
- a small roo or wallaby
- and some kind of owl-like bird sitting in the middle of the road. I managed not to hit it.
Backcountry roads here (and about everything 50+k out of Brisbane is backcountry) commonly consist of one single lane of asphalt/bitumen, and a bit of dirt, grass, rocks and/or potholes on both sides. When there is some oncoming traffic, both have to pull aside into the dirt (and hope that there's nothing hidden in the grass that your car can't take at 80+km/h). There's bonus points for doing this during the night.
"Highways" on the other hand, consist of two lanes of bitumen. Often there's a middle line, but not necessarily - and there are some "highways" that have single lane areas as well.
(I love this place. Really. But I'll have to get me a 4WD soon.)