This article aims to provide an overview of railway signalling trends in Australia. It is important to understand that Australia is not just a country but a whole continent with a great variety of railway systems much less coherent than those in Europe. Accordingly, there is a wide range of different signalling and train control systems in Australia. One could even see it as an almost unparalleled showcase of modern signalling and train control variety, and you may well agree with that view after reading this article.