The indicator should be on the outside, so you can change gear (in a manual transmission car) and indicate at the same time. It's just common sense. I am used

The indicator should be on the outside, so you can change gear (in a manual transmission car) and indicate at the same time. It's just common sense. I am used to the indicators on the left though when driving my BMW, so I experience the classic "wipers instead of indicators" dance many times when I drive my wife's car. As most cars nowadays are automatics, I guess this reasoning is falling out of relevance more and more. I also want to note that not all Australian built cars had wipers on the left and indicators on the right – many GM Holden models like the Kingswood and early Commodore models from the 1980s had them both on the one stalk – that stalk being on the right of course.