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T2D Reference Design released

28 November 2021

A major milestone has been reached for the T2D Project with the release of the Reference Design today.

Following earlier publication of the designs for the southern section of the project, today’s release shows for the first time how motorists will travel between the River Torrens and Anzac Highway.

The design for this northern section includes:

  • over 2 km of twin three-lane tunnels
  • impacts avoided on heritage sites in Adelaide’s inner-west
  • the extent of the Northern Tunnels, with entry and exit points at Hilton and Torrensville
  • east-west connectivity maintained and enhanced at James Congdon Drive, Richmond Road, and Everard and Barwell Avenues.

The Reference Design covers the full length of the 10.5 km non-stop motorway, between the River Torrens and Darlington, which includes nearly 7 km of tunnels that will take tens of thousands of vehicles off South Road every day. The new elements released show how the T2D motorway will operate as a whole. The Reference Design is available here.

In addition, the design will be showcased at more than 20 displays and information kiosks at shopping centres, community centres and council libraries across metropolitan Adelaide until 11 December. We will continue with our engagement activities in 2022 on the project’s design and other key areas of community interest. Feedback gathered will be considered in the development of the Project Assessment Report. Locations and dates for our displays are available here.

The Reference Design provides further vital information on the development of the T2D Project, including:

  • detailing the overall Project area
  • using the traffic modelling to confirm numbers of lanes and connectivity with the road network to ensure safety and functionality
  • confirming construction methodology and traffic flow during construction
  • preliminary analysis of social and environmental investigations.

The design has been developed through expert analysis and high-tech studies. Extensive investigation and studies across areas such as noise, geology, air quality, soil studies, groundwater and traffic have resulted in vast amounts of data informing our design. We have also engaged broadly with key stakeholders to understand the issues that matter most to them to further inform the design process. To view some of the feedback gathered, please view our Community Engagement Report.