Skip to main content

Mount Barker Interchange Upgrade

Mount Barker is currently a major growth area in the Adelaide Hills.

The existing Mount Barker Interchange will be upgraded to include a new three-lane bridge across the South Eastern Freeway for northbound traffic, with the existing bridge converted to accommodate three lanes of southbound traffic and a new Shared Use Path. It will also include improved ramp capacity and new traffic signals to improve safety and reduce congestion.

The current Mount Barker Interchange is subject to significant congestion and queuing, with 43 crashes reported between 2019 and 2023.

Upgrading this interchange will improve capacity, traffic efficiency and commuter safety in the area.

The Mount Barker Interchange is expected to be open to traffic in late 2027.

Key features include:

  • a new three lane bridge over the South Eastern Freeway for northbound traffic;
  • conversion of the existing bridge to accommodate three lanes of southbound traffic;
  • a new signalised intersection at Adelaide Road and the freeway exit ramp from Murray Bridge;
  • upgrades to the existing ramps to and from Adelaide to improve safety and capacity;
  • a new bus priority lane;
  • a new Shared Use Path;
  • a new northbound on road bike lane; and
  • improved accessibility and safety for Adelaide Road service road.

For further information

If you have any questions or would like to receive updates about the Mount Barker Interchange Upgrade, please: