Tonkin Consulting

South Road Planning Study

Department of Infrastructure Planning and Transport

South Road Planning Study

Department of Infrastructure Planning and Transport

South Road Planning Study

Department of Infrastructure Planning and Transport

South Road Planning Study

Department of Infrastructure Planning and Transport

South Road Planning Study

Department of Infrastructure Planning and Transport

South Road Planning Study

Anzac Highway to Southern Expressway

Tonkin Consulting co-delivered a major planning study on the North-South corridor between Anzac Highway and the Southern Expressway through the Linking SA consortium.

The study analysed current and projected traffic movements along the near nine kilometre section of South Road which was one of the key aspects of the study.

The Commonwealth and State government supported work addresses future plans to develop a non-stop corridor from Gawler to Old Noarlunga.

The key study objective was to identify potential alignment and concepts for a non-stop North-South corridor between the Southern Expressway and Anzac Highway.

The Linking SA multi-disciplinary team, which collaborated closely and integrally with the Department of Planning, Transport and Infrastructure, comprised expertise from Jacobs, SMEC, Wallbridge & Gilbert and Tonkin Consulting, with land use planning and urban design carried out by sub-consultants Jensen Planning + Design. The proposed developments outlined in the study will provide non-stop traffic flow along the corridor while providing connectivity with the adjacent road network for commuters and direct connections for freight transport with major industry and export centres.

The collaborative approach of the team working together in the one location on site was a strong driver of the successful outcomes.

The study covered two distinct sections, examined by separate, coordinated teams: (1) Darlington Upgrade Project from Southern Expressway to Ayliffes Road; and (2) Ayliffes Road to Anzac Highway including the Emerson Overpass at Cross Road. Several options for each section were explored to cater for estimated future traffic volumes.

The concept design forms the basis for moving towards more detailed concept development before final detailed design and construction.

The planning study and concept also had a strong focus on improving conditions for cycling, walking and public transport.

Challenges addressed in the study included key stakeholder management, management of community expectations during the land acquisition process, services risks posed by the construction methodology, complex interchanges, and costs. Eight options were developed and priced to meet the highest level of functionality for the best value.

Study focus points

  • Create a non-stop corridor for long distance north-south traffic movement
  • Provide accessibility and connectivity to the rest of the arterial road network and adjacent land users
  • Model traffic flows to assess options and intersection/interchange arrangements
  • Ensure intersections have sufficient capacity for traffic volumes
  • Ease congestion and improve flows along the Darlington section of Main South Road
  • Ease congestion at the Emerson Overpass
  • Minimise land acquisition
  • Integrate land use planning with corridor development
  • Support the major redevelopments of Tonsley and Castle Plaza

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