And what a job it is. Minister for Transport and Infrastructure Andrew Constance says it's the biggest revamp Sydney's busiest train station has seen in decades, claiming that it will "transform the daily commute for Sydneysiders forever". While the station's currently used by around 270,000 commuters daily, that number's expected to hit 450,00 over the next 20 years.
The huge operation will see new Sydney Metro platforms constructed beneath the current platforms 13 and 14, as well as the installation of a new 19-metre underground thoroughfare they're calling Central Walk. This will run from Chalmers Street, but unlike the existing one, it will more efficiently connect existing rail platforms to light rail and bus services, and the new Metro platforms. For the first time, commuters will also be able to move between platforms 12 and 23 via escalators.