In response to feedback from industry, changes to the project design and a review of the procurement approach, an alliance contracting structure will now be adopted. This will allow the delivery of multiple packages of work.
The procurement process is expected start this month and the contract will be awarded next year.
Following the review, construction of the Southern Tunnel and Northern Tunnel will occur sequentially, rather than overlapping as originally planned. This programme of works will smooth out labour demand at peak construction.
The 10.5km T2D Project is the final and most complex section of Adelaide’s 78km North-South Corridor and the most significant infrastructure project ever undertaken in South Australia.
It comprises two sets of twin three-lane tunnels, lowered and ground-level motorways, as well as overpasses and underpasses and upgrades at key intersections. More than half of the project will be tunnels.
Main construction work is scheduled to commence in 2025 and the first TBM will be launched for the Southern Tunnel in 2026. The Southern Tunnel will be open to traffic in 2030 and the entire T2D Project will be open in 2031.
