Mount Barker Interchange Upgrade

Fast facts

Status

Planning.

Location

Mount Barker.

Funding

Funded by Australian and South Australian governments (80:20).

About the project

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

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.

These works are part of the South Eastern Freeway Interchanges upgrades.

Major construction at the Mount Barker Interchange is planned to start in late 2025. The interchange is expected to be open to traffic in late 2027.

What's happening

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.

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
improved accessibility and safety for Adelaide Road service road.