Majors Road Interchange Project

Majors Road Interchange Project

We’re building a new connection to the Southern Expressway, improving access, travel times and supporting growth in the southern suburbs.

Shorter and safer journeys.
A safer and more pleasant ride for cyclists.
Better connections to sporting and recreational facilities.
Protecting Glenthorne National Park and planting more trees.

Fast facts

Status

Open to traffic.

Location

Majors Road and the Southern Expressway.

Jobs supported

245 jobs per year averaged over the construction period.

Funding

$120 million jointly funded (50:50) by the Australian and South Australian Governments.

About the project

The Majors Road Interchange is now open to traffic. This project constructed new on and off-ramps for the Southern Expressway at Majors Road, making it easier for commuters in the southern suburbs to access the expressway.

Major works on the project began in March 2024 and were completed in October 2025. The project is now delivering shorter and safer journeys for travellers through the southern suburbs, as well as better connections for local facilities.

We would like to sincerely thank the community, particularly local residents and businesses, for your patience and understanding during these important works.

What did it involve

As part of the project, we made a range of improvements for vehicles, cyclists and pedestrians. We also worked to minimise impacts on the nearby parks and properties, improve amenity and regenerate the landscape around the project footprint.

Road improvements

  • New on and off ramps to the Southern Expressway to improve access to the Adelaide CBD, North South Corridor, southern suburbs and Fleurieu Peninsula.
  • New traffic signals at the junction of Majors Road and Adams Road, improving access to Sam Willoughby International BMX Facility and O'Halloran Hill Recreation Park.
  • Widening of Majors Road to two through-lanes in both directions. This improvement spans between the Southern Expressway and Lonsdale Highway/Ocean Boulevard.
  • Widening the Majors Road bridge to three lanes in each direction, two through-lanes and one dedicated right-turn lane onto the expressway in each direction.
  • Direct access to the new interchange for emergency services.

Pedestrians and cyclist improvements

  • Pavement rehabilitation and duplication along Majors Road up to Lonsdale Highway/Ocean Boulevard.
  • A new underpass at Majors Road, ensuring continuous access to the Patrick Jonker Veloway
  • Realignment of the Patrick Jonker Veloway to improve the path orientation and sightlines
  • 1.8 kilometres of new Shared Use Path on the southern side of Majors Road, connecting Main South Road to Lonsdale Highway (in conjunction with City of Marion).

Landscape regeneration and amenity improvements

  • 42,000 new plants, including more than 228 mature trees were planted along the Shared Use Path next to Majors Road to improve amenity and achieve 50% shade coverage (upon maturity)
  • Installed powerlines underground along this section of Majors Road
  • Designed a new plant nursery in partnership with Friends of Glenthorne.
  • No impact to O'Halloran Hill Recreation Park or Glenthorne Farm
  • Minimal impact to Glenthorne National Park.

Video

Watch the project's construction timeline.
Less than 2 minutes

Timeline

Planning

Began July 2022.
Completed in mid 2023.

Early works

Began in mid 2023.
Completed in late 2023.

Construction underway

Began in late 2023.

Open to traffic

October 2025.

Community engagement

Engagement with the community will continue to be an important part of the project during the construction period. We look forward to keeping you well informed about the status of the project and minimising impacts as much as possible.

Our frequently asked questions page has more information about community consultation. 

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Contact

Majors Road Project Team

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