Skip to main content


Roe Highway and Kalamunda Road Interchange upgrades



  • Road

    Project type
  • $86 million

    Total budget
  • Under Construction

    Project phase
  • Main Roads WA

    Lead agency
  • 600

    Jobs supported
  • Late 2019

    Start date

    Early 2021

    End date

Construction of an interchange at the Roe Highway and Kalamunda Road intersection is underway and includes the installation of a new bridge, two roundabouts and on and off ramps.

Currently the intersection suffers from heavy congestion and has a higher than average number of crashes. This upgrade will assist in improving road safety for residents in Kalamunda and the foothills of Perth.

The project will also remove one of the last signalised intersections on Roe Highway.


  • Reduced traffic congestion
  • Improved road safety
  • More efficient, reliable movement of freight
  • Provision of a safe route for people riding and walking in the area

Project map

This map shows an aerial view of the project location
Project work area

Detour options

  • Temporary closure of right turn access from Kalamunda Road westbound to Roe Highway northbound

    The closure of right turn access at the intersection will will occur from 6 January to early April 2021 and allow construction of the new northbound carriageway, and the western roundabout of the interchange.

    • Light vehicles will be detoured west along Kalamunda Road to the roundabout at Newburn Road, where they can U-turn back towards the intersection and access Roe Highway via the northbound on-ramp.
    • Heavy vehicles will be encouraged to detour via Stirling Crescent and Great Eastern Highway bypass to Roe Highway northbound. 

    Extensive signage will be in place to alert drivers to this change.

    The removal of traffic signals at the intersection will occur at the same time as the opening of the new Roe Highway temporary alignment. This will result in a significant reduction in congestion. 

    As per the current arrangement, vehicles heading north on Roe Highway will not be able to turn right at Kalamunda Road. The Maida Vale Road detour will remain in place.

  • Temporary closure of Roe Highway northbound on-ramp

    To facilitate construction of the new northbound on-ramp to Roe Highway from Kalamunda Road, as well as the new Kalamunda Road eastbound lanes, the existing on-ramp will close from 8pm on 26 March 2021 to end of May 2021.

    A detour to Roe Highway via Stirling Crescent and Great Eastern Highway Bypass will be in place during this time.

    The temporary detour has been designed to ensure minimal increases in travel times. Signage will be in place to alert drivers to the change.

Plan your journey

Avoid disruptions to your journey and plan your trip