Sydney’s Super Tunnel 2-4

Testing Times. After the completion of 30km of tunnelling, workers prepare to build railway stations, lay tracks and test driverless trains.

Fast Tracked. Architect Ross de la Motte finds out if his vision for the station designs have worked out as expected.

Down And Dirty. As Australia's largest transport project gets underway, we go back under Sydney Harbour to check out history in the making as the construction of the twin metro rail tunnels continues.