Traffic? Australia?
You musty be having a laugh!
I moved over here from London last year. Trust me when I say the Aussies have no idea what "traffic" really means. Besides which, the only transport problems they really have are people commuting about inside cities, as going from one city to another is a serious undertaking so most of the roads elsewhere are deserted most of the time.
Frankly a focus on suburban public transport improvement would likely help more.