Project Details

Tonkin Highway Corridor Upgrade

Project Status : In Progress
Estimated Completion Date : To be advised
Location : Tonkin Highway, Hale Road, Welshpool Road East, Wattle Grove, Forrestfield

Main Roads WA are planning to upgrade Tonkin Highway from north of Hale Road to south of Kelvin Road. The work will include major changes to the intersections with Hale Road, and Welshpool Road East, both being within the City of Kalamunda area.

The $366 million Tonkin Highway Corridor project is jointly funded by the Australian ($293 million) and State ($73 million) Governments. It is part of the broader Tonkin Highway transformation strategy which also includes Tonkin Gap and Tonkin Highway Extension.

The work will include widening the highway from four to six lanes, and building new facilities for pedestrians and cyclists along the corridor with links to the City's cycling network.

Planning and development work is underway to improve safety and reduce delays along the heavily congested section of Tonkin Highway from Roe Highway to Kelvin Road. The project will be delivered under two contracts; the first includes the intersections along Tonkin Highway at Hale Road and Welshpool Road, and the second includes Tonkin Highway and Kelvin Road.

Project scope

  • Widening Tonkin Highway from four to six lanes from south of Roe Highway to Kelvin Road
  • Grade separations (Tonkin Highway travelling over intersections at):
    • Tonkin Highway / Welshpool Road – Connections to and from Tonkin Highway north and south
    • Tonkin Highway / Hale Road – Partial connection with north-facing ramps (to and from the airport and Perth)
    • Tonkin Highway / Kelvin Road – Connections to and from Tonkin Highway north and south
  • Median and verge barriers
  • Principal Shared Path connecting to existing paths north on Tonkin Highway, including underpasses at ramps at the new intersections
  • Lighting and noise walls
  • Local urban design and landscaping opportunities.

For latest information and project developments, please visit the Main Roads WA project site:

On 27 August 2021, MainRoads WA shared the following design for the Tonkin Highway corridor.

Read the full media statement via

Project Images

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Related Documents

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Contact Information

Please direct enquiries to Main Roads WA
Web site:
Phone: 138 138

© City of Kalamunda 2023