Sydney’s Super Tunnel 2-2

Digging Deep. A challenge lies in weight when the time comes to dig two tunnels beneath Sydney Harbour, with an insight into the team's planning process.

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

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.