Sydney’s Super Tunnel

Countdown To Launch. After almost 10 years of planning, building and involving more than 60,000 people from around the world, Australia's largest transport infrastructure project nears completion.

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

What Lies Beneath. Engineers encounter all sorts of issues while tunnelling through a minefield of pre-existing infrastructure.

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.

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

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.

What Lies Beneath. Engineers encounter all sorts of issues while tunnelling through a minefield of pre-existing infrastructure.

Action Stations. The inside story of a crack team building a trailblazing, fully-automated metro system costing $50 billion, by far the biggest and most advanced new railway opening anywhere on the planet in 2019.