I was looking through the oft first resource for high school students, Wikipedia*, and came across a series of pages devoted to etiquette in particular countries. Browsing the Australian and New Zealand pages, it led me to realise that generally Aussies are pretty polite folk. Did you know than on the whole, Aussies thank the bus driver when exiting a bus, but most other nationalities do not? And flashing your headlights to warn oncoming drivers of speed cameras or road hazards is a uniquely Aussie thing too. Wikipedia certainly is becoming the real life ‘Encyclopaedia Galactica.’
The library also has several resources on etiquette in general, and etiquette when travelling.
Off the Shelf 
But young Aussies generally don’t give up their seats on trains for old girls like me.