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Roads of Strategic Importance (ROSI) Program

The Roads of Strategic Importance program (ROSI) is an initiative of the Australian Government which aims to deliver improvements to freight movements, support regional economic growth and connectivity, and improved safety for all road users.

Upgrades of rural road corridors that fall under this program within South Australia include Sturt Highway, Barrier Highway and Eyre Highway.

Further information about the Australian Government’s overarching ROSI program can be found here ( )

The Department’s corridor analysis has identified a proposed program of works for each corridor as detailed below.

Sturt Highway

A funding commitment of $87.5 million has been made to upgrade the Sturt Highway between Renmark and Gawler.

Extending approximately 210km, this section of Sturt Highway passes through the townships of Nuriootpa, Truro, Blanchetown, Waikerie, Loxton, Barmera, Berri and Renmark.

Upgrades along this section of Sturt Highway could include:

  • junction improvements
  • new overtaking lanes and overtaking lane extensions
  • pavement resealing and rehabilitation
  • safety barrier upgrades
  • new and upgraded rest areas for improved fatigue management
  • planning investigation of a potential Truro bypass
  • planning for a future road duplication between Renmark and Berri.

Key Investigations underway include:

  • Truro Bypass Planning Study – to address safety and amenity issues raised by the Truro community, investigations of options for a highway bypass of Truro are being undertaken. The study will consider multiple routes including options to incorporate Accommodation Hill.
  • Junction upgrades:
    • Sturt Highway / Old Sturt Highway junctions (located at either end of Berri bypass) – the proposed upgrade includes new roundabouts to improve safety.
    • Sturt Highway / Airport Road (near Renmark) – proposed upgrade includes a new roundabout to improve freight access to the Sturt Highway.
  • Overtaking lanes - to improve safety and capacity new lanes between Truro and Kingston-on-Murray.
  • Berri to Renmark road duplication Planning Study – the high volume of traffic travelling between these regional centres is approaching capacity. Investigations are underway to understand impacts associated with potential duplication options.

For further information visit the Sturt Highway Upgrades project website.

Barrier Highway

A funding commitment of $62.5 million has been made to upgrade Barrier Highway between Cockburn and Burra.

Extending approximately 305km, this section of Barrier Highway passes through the townships of Olary, Yunta, Terowie, Hallett and Mount Bryan.

Upgrades along this section of Barrier Highway could include:

  • shoulder sealing
  • bridge widening and safety barrier upgrades
  • road safety improvements
  • rest areas for improved fatigue management
  • pavement rehabilitation and resurfacing
  • Intersection upgrades.

Key Investigations underway include:

  • Bridge widening – works to widen and strengthen key bridges to improve safety and cater for heavy vehicle loads.
  • Intersection upgrades – upgrades to cater for heavy vehicle turning movements on freight routes.
  • Shoulder sealing and audio tactile line marking – widening the sealed road width and improved line marking to address fatigue safety risks.

Eyre Highway and Eyre Peninsula Roads

A funding commitment of $125 million has been made to upgrade Eyre Highway between Border Village and Port Augusta, and Eyre Peninsula roads impacted by the recent closure of the Eyre Peninsula rail network – namely Tod Highway, Birdseye Highway, and Lincoln Highway.

Extending approximately 945 km, the section of Eyre Highway between Border Village and Port Augusta passes through Yalata, Penong, Poochera, Ceduna, Minnipa, Wudinna, Kyancutta, Kimba and Iron Knob.

Closure of the rail corridors now requires agricultural produce to be transported by road to redistribution nodes or ports, which has increased the dependence on selected roads. Improvements aim to address safety and efficiency of transport on these routes.

Upgrades along this section of Eyre Highway and Eyre Peninsula roads could include:

  • new overtaking lanes
  • road widening and shoulder sealing
  • rest areas for improved fatigue management
  • pavement rehabilitation
  • safety measures such as audio tactile line marking, improved signs and hazard protection
  • intersection and roundabout improvements
  • bridge upgrades.

Key investigations underway include:

  • New overtaking lanes - to improve safety for freight and commuter vehicles bound for Port Lincoln. New lanes on Lincoln Highway (Tumby Bay to Louth Bay), Tod Highway (South of Cummins), Western Access Road (New West Road to Pine Freezers Road) and  Flinders Highway (extension of acceleration lane at the Tod Highway junction) are priority locations.
  • New overtaking lanes - to improve capacity between the major regional towns as well as safety due to high traffic volumes on Eyre Highway directly west of Port Augusta, new overtaking lanes between Port Augusta airport to rail overpass are priority locations.
  • Intersection improvements – to address constraints due to the tight turn movements for freight vehicles over the rail crossing at the western end of Kimba, a road realignment is proposed (possibly including new rest area for freight and passenger traffic). This could reduce the need to use the over-dimensional route.
  • Intersection improvements – to address multiple locations near and within Ceduna to improve safety. Locations include the junctions of Eyre Highway with McKenzie Street, and Eyre Highway with Flinders Highway.
  • Shoulder sealing – to provide a consistent seal width for improved safety along Tod Highway (Flinders Highway to Lock) and Birdseye Highway (Rudall to Cleve). Early works have been completed on Birdseye Highway (Cowell to Cleve) and Lincoln Highway (Lucky Bay to Birdseye Highway).
  • Roundabout improvements – In response to safety concerns raised with uncontrolled pedestrian movements across Lincoln Highway, layout upgrades to the traffic and existing crossing points on existing roundabouts in Port Lincoln CBD.

Planning and design work will continue in the coming months with more information on the proposed scope of works to come.

The Department will continue to consult with key regional and industry stakeholders during the planning and design phase.

To provide your feedback or register your interest please don’t hesitate to contact the project team:

  • email
  • telephone 1300 794 880