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Horrocks Highway Upgrades

The Horrocks Highway Corridor Upgrade forms part of the South Australian Rural Roads (SARR) Package, which is focussed on upgrading the 245 kilometres length of highway between Wilmington and Gawler, to improve safety, connectivity and freight efficiency, whilst importantly creating jobs.

Works include shoulder sealing, pavement rehabilitation, new overtaking lanes and overtaking lane extensions, bridge upgrades, safety barrier, Audio Tactile Line Marking (ATLM) and improvements to the Gladstone rail corridor and level crossing.

This $82.2 million dollar project is jointly funded (80:20) funded by the Australian and South Australian governments.

Project Details



Estimated Start Date

Expected Completion Date (weather permitting)

Between Wilmington and Yacka

Approximately 59km of shoulder sealing and pavement rehabilitation.

In progress

Early 2022

Between Clare and Templers

New overtaking lanes and overtaking lane extensions.

Late 2021

Late 2022

Little Spring Creek, Spring Creek, south of Wilmington

Bridge upgrades – to remove constraints preventing the use of freight vehicles.

Early 2022

Late 2023

Horrocks Highway level crossing

Upgrades to the Gladstone rail corridor and level crossing to address extended periods of flashing rail signals whilst rail movements occur near the Horrocks Highway level crossing.

November 2021

Second quarter of 2022

Between Wilmington and Templers

Road safety improvements including shoulder sealing, pavement rehabilitation, safety barrier upgrades, directional signage replacements, centreline treatments and audio tactile line marking.

Late 2021

Late 2023

Between Gladstone and Goyder Highway, and between Murray Town and Wirrabara

Installation of safety barrier at various locations.

May 2021

Early 2022

Between Templers and Roseworthy

Sealing of local road approaches.

February 2021


Between Melrose and Wirrabara, between Goyder Highway and Yacka and between RM Williams Way and Clare.

Installation of Audio Tactile Line Marking.

October 2021

Late 2021

  • Rhynie   Township.
  • Owen   Road and Templers Road intersection, Templers

Improved Road Lighting.

October 2021

Late 2021

Between Wirrabara and Yacka

Approximately 28km of shoulder sealing.

December 2020


RM Williams Way junction to Clare

Approximately 8km of shoulder sealing and pavement rehabilitation.

April 2021

Late 2021

Clare to Undalya (south of Auburn)

Approximately 27km of shoulder sealing and pavement rehabilitation.

March 2021

Late 2021

Melrose to Murray Town

Approximately 8km of pavement rehabilitation

April 2021


Undalya to Giles Corner

Approximately 18km of shoulder sealing and pavement rehabilitation.

Late 2021


Stone Cutter Road junction to Bungaree Road junction (near Rochester)

Approximately 9km of pavement rehabilitation and shoulder sealing.

Late 2021

Early 2022

Following the completion of re-sealing and pavement rehabilitation works speed restrictions remain in place on the newly resurfaced section of road to enable excess bitumen on the new surface to be worn to a safe texture level (this is in relation to the skid resistance of the road surface), prior to the posted speed limit being reinstated.

COVID-19 Response

The Department will continue to tailor community engagement opportunities in line with the latest COVID-19 advice from health authorities.

Face-to-face engagement opportunities may be restricted and we will continue to be guided by the advice of health authorities, with the health and safety of our stakeholders always our highest priority.

Engagement with community and industry is crucial and we will facilitate information sessions as much as possible to enable face to face engagement.  It is important to assist in managing these events that you register as requested to enable physical distancing as much as possible.

The project team will provide construction updates and work notifications via social media, letterbox drops, emails and the Project website. We are also available to speak via telephone (1300 103 456).

We encourage the community to register for email updates.

Contact Details

For more information or to register your interest please contact the project team:

  • email
  • telephone 1300 794 880