Princes Highway Upgrades

The Department for Infrastructure and Transport (the Department) is delivering infrastructure upgrades on the Princes Highway, from Meningie to the South Australian/Victorian border. These upgrades are jointly funded by the Australian and South Australian governments (80:20).

These works will support South Australia's regional economic growth, improve access for high productivity freight movements, provide upgrades to regional road networks for improved accessibility and community connectivity, enhance opportunities for regional tourism in South Australia and improve long term safety and efficiency for all road users.

Earlier this year we identified a number of defects at multiple locations along Princes Highway. In collaboration with our contractor, Acciona, we are now undertaking defect remediation works between Meningie and Kangaroo Flat Road, Wandilo. For more information please view the latest works notice.

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Current Works on Princes Highway

Location	Scope	Project Timeline*	Latest News
Princes Highway / The Springs Road/ Burrungule Road Intersection	Intersection Upgrade	August 2023 to October 2024	Works Notice
Approximately 12kms south east of Mount Gambier	New eastbound and westbound overtaking lanes	September 2023 to late 2024	Works Notice

*Project timelines weather permitting

Completed Works on Princes Highway

Location	Scope
Jubilee Highway West between Suttontown Road and Wehl Street North and between Wehl Street North to Penola Road	Pavement rehabilitation
Four roundabouts within the township of Mount Gambier on Jubilee Highway West (Princes Highway) at O’Leary Road, Suttontown Road, Wehl Street North and Penola Road (Riddoch Highway)	Roundabout upgrades
Approximately 12kms south of Meningie	New northbound and southbound overtaking lanes
Princes Highway / Furner Road Junction	Junction Upgrade
Along the Princes Highway between Kingston SE and the South Australian/Victorian border	Audio Tactile Line Marking
Princes Highway / Walkers Tin Hut Road Junction	Junction Upgrade
Approximately 7kms north of Millicent	New northbound and southbound overtaking lanes
Approximately 13kms south east of Millicent	Extension of existing overtaking lanes, westbound and eastbound
Approximately 16kms south east of Millicent, opposite Tantanoola Roadhouse	Upgrade of existing rest area
Approximately 15kms north west of Mount Gambier	Extension of existing overtaking lanes, eastbound and westbound
Approximately 9kms north west of Mount Gambier	Extension of existing overtaking lane eastbound

Culvert Upgrades on Princes Highway

As part of the South Australian Regional Bridge Upgrades, two culverts on the Princes Highway have been upgraded. These include:

Reedy Creek - culvert over Drain L located on Princes Highway, approximately 40 kilometers south-east of Kingston. Works will replace and widen the existing culvert and upgrade the safety barriers.
Thornlea - culvert over the stormwater crossing located on Princes Highway, approximately 23 kilometers north-west of Millicent. Works will replace and widen the existing culvert and upgrade the safety barriers.

For more information on these works, please visit the South Australian Regional Bridge Upgrades project page

Further information

If you have any questions or would like to speak to a member of the project team, please call 1300 794 880, email DIT.Engagement@sa.gov.au or subscribe to receive project updates.