What Lies Beneath: The team faces a tough challenge - boring beneath Sydney's 230-year-old CBD. At Pitt Street Station, eight buildings are demolished, including a 14-storey tower. [S]
New. Railroaded: The project's most daunting challenge - tunnelling under Sydney Harbour - begins. At Martin Place, engineers juggle skyscraper construction above and station excavation below. [S]
New. Finishing Lines: With deadlines looming, crews race to install tracks, cabling, ventilation, safety systems and 900,000 plants. The first driverless train arrives in Sydney for testing. [S]
New. Great Expectations: An extension is now underway to get people into the centre of Australia's biggest city, including a new tunnel crossing deep under Sydney Harbour. [S]
New. Down and Dirty: We go back under Sydney Harbour to check out history in the making as the construction of the twin metro rail tunnels continues deep under the surface. [S]
New. Testing Times: After 30km of tunnelling, workers prepare to build stations, lay tracks and test driverless trains. At Central Station, the underground pedestrian subway comes to life. [S]
Action Stations: Action Stations: We meet the international team taking up the $50 billion trailblazing challenge of building the world's most advanced driverless metro in Sydney. [S]