Stephenson Avenue Extension

Under constructionUnder Construction

Extending a busy road to Mitchell Freeway and Cedric Street.

Aerial view of Mitchell Freeway near Cedric Street

What's happening

 Changes to the Mitchell Freeway / Cedric Street interchange:

Temporary on and off-ramps have been constructed at the Mitchell Freeway/Cedric Street interchange. This will shift traffic off the existing Cedric Street ramps, to enable construction of the new Mitchell Freeway/Stephenson Avenue interchange. The major changes include:

  • The northbound off-ramp opened on Tuesday 18 October 2022 and be used for approximately 15 months.
  • The southbound off-ramp opened on Thursday 20 October 2022.
  • The southbound on-ramp opened on Saturday 29 October 2022. The southbound on and off-ramps will be open for approximately 9 months.

Stephenson Avenue Extension - Temporary ramp changes.png    Stephenson Avenue - Southbound ramp

Traffic congestion is anticipated to increase in the area, particularly during peak times, and we advise motorists to allow extra travel time or take an alternative route if possible. We sincerely apologise for any inconvenience caused during this time.

Noise, dust, and vibration may be noticeable to those living or working nearby, as we prepare for construction of the new bridges, freeway on and off-ramps and the shared path. A range of control measures are being put in place to minimise dust and noise disturbance.

Stirling Bus Interchange

The Stirling Bus Interchange, adjoining Stirling Station and the Mitchell Freeway, is undergoing a major upgrade. You can find out more information on the PTA webpage.

Passengers will have front row seats to view the expansion of the interchange with enabling works underway. These construction works will change how you navigate your way through the car parks and to the station.

Passengers and drivers may notice the following changes, divided into four sections below. 

We understand these works may add to your journey time and we will regularly review our signage and detour routes to deliver the fastest and safest station entry and exit routes.

The works are being managed by the S2M Evolution Alliance on behalf of Main Roads and the Public Transport Authority. Questions, feedback or concerns regarding the works should be directed to the 24/7 project information line on 138 138 or email


traffic flow





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The Government of Western Australia acknowledges the traditional custodians throughout Western Australia and their continuing connection to the land, waters and community. We pay our respects to all members of the Aboriginal communities and their cultures; and to Elders both past and present.

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