Major work on Majors Road Interchange as concept design finalised

Thursday, 7 March 2024

Major works are starting on the Southern Expressway and Majors Road Interchange project in Adelaide’s south, following refinements to the concept design in response to community feedback and additional technical analysis.

Additions to the design include the widening of Majors Road from the Southern Expressway to Lonsdale Highway/Ocean Boulevard to provide two lanes of traffic in both directions.

This section of road will also have power lines moved underground to provide further opportunities for increased landscaping and tree planting along Majors Road.

The design refinements mean the on/off ramps will be shortened by approximately 100 metres, further minimising impact on land and vegetation.

The design now includes tree planting for the shared use path along Majors Road, to achieve 50 per cent shade coverage when grown, and a realignment of the Patrick Jonker Veloway to the east of the new on/off ramps under Majors Road for improved sightlines.

The updated design has further reduced the already very minor impact on the Glenthorne National Park – Ityamaiitpinna Yarta, and continues to have no impact on Glenthorne Farm or O’Halloran Hill Recreation Park.

The $120 million project is jointly funded by the Australian and South Australian governments, with each contributing $60 million.

Majors Road is an important arterial road, providing a key connection between Lonsdale Road and Main South Road for 13,200 vehicles per day.

The project will include new on/off-ramps for the Southern Expressway, which itself carries approximately 74,000 vehicles per day between Darlington and the Reynella Interchange.

Commuters in the southern suburbs will have greater access to the Southern Expressway and the upgrade will also improve access to Glenthorne National Park – Ityamaiitpinna Yarta, Riding for the Disabled, Sam Willoughby International BMX Facility and Southern Soccer Facility from the Southern Expressway.

Short-term closures of Majors Road will be needed to safely complete the work.

The Southern Expressway will have localised speed restrictions in place while these important works are undertaken.

Final project completion is expected at the end of 2025.