Inside the high-tech nerve centre bracing for Sydney’s new metro line

In a nondescript building on the outskirts of Sydney’s north-west, controllers are repeatedly practising drills involving driverless trains that whisk under the heart of the city more than 40 kilometres away. Unpredictable passenger behaviour is at the forefront of their minds as they prepare for the $21.6 billion second stage of Sydney’s metro network opening early next month. The metro line will carry tens of thousands of passengers every hour when it opens, many of whom will be travelling on …