Major milestone as interchange opens to traffic

Tuesday 14 October 2025

The $120 million Majors Road Interchange upgrade will open tomorrow, delivering shorter and safer journeys through Adelaide’s southern suburbs for travellers and locals.

The newly widened Majors Road bridge will improve travel on an important arterial road for connections between Lonsdale Road and Main South Road.

About 13,200 vehicles travel daily on Majors Road – anticipated to increase to around 14,700 during peak times by 2036.

The new on/off-ramps for the Southern Expressway at the Majors Road junctions will create seamless journeys for commuters in the southern suburbs.

The Southern Expressway serves as the gateway to the Fleurieu Peninsula, carrying approximately 74,000 vehicles per day, and supporting economic activity and tourism in the region, including Kangaroo Island.

The project was jointly funded by the Australian and South Australian governments, with both contributing $60 million.

Major works on the project began in March 2024 and across its duration, 245 South Australian jobs have been supported, including 12 per cent of the cohort Indigenous employees, 10 per cent apprentices and trainees, and four per cent individuals facing barriers to employment or who were long-term unemployed.

The completed project will also see 1.8 kilometres of new shared-use paths to connect two major cycling routes, increasing access to important community facilities, including Glenthorne National Park–Ityamaiitpinna Yarta, Glenthorne Farm and O’Halloran Hill Recreation Park.

Approximately 42,000 new plants have been introduced throughout the project, including more than 200 mature trees.

While the new ramps will open to the public from tomorrow, speed limits on the on/off-ramps will remain reduced for a few weeks to allow the road surface to develop traction for safe driving at higher speeds.