Our rather awful bus pricing is based on the number of ‘sections’ that you travel. According to the Sydney Buses website a section is about 1.6km. The way to calculate how much a trip will cost you, and which ticket you should use, is to download a PDF file and count the sections your trip will cover – or ask the bus driver.
Now, surely, this is something that the various transport apps should be dealing with? I would see that as a real bonus if, when looking up a trip, it also told me how many sections the trip covered.