Project
Stephenson Avenue Extension New road project
Stirling, Innaloo, Osborne Park
Overview
-
Road
Project type -
$461.4 million
Total budget
-
Under Construction
Project phase -
Main Roads WA
Lead agency
-
800
Jobs supported -
Late 2020
Start dateMid 2026
End date
The Stephenson Avenue Extension will provide a new connection from Cedric Street to Scarborough Beach Road, including an interchange at Mitchell Freeway.
Phase one off the project was delivered by the City of Stirling and opened in February 2022. This included the extension of Scarborough Beach Road to Flax Way, new local road connections and improved shared paths.
Phase two involves extending Stephenson Avenue to Mitchell Freeway and Cedric Street, major upgrades to active transport links, with new shared paths and local road connections opening in stages, and a new Principal Shared Path (PSP).
The Stirling Bus Interchange will be delivered as part of this project, with completion anticipated in mid-2026. Works are underway to increase capacity from a 16-stand to a 29-stand facility, with a new pedestrian access between Stirling Station and the southern car park. Main Roads WA are delivering this upgrade on behalf of the Public Transport Authority.
As works continue, road and path users are being urged to plan their journeys.
For detailed project information, visit Main Roads WA.
Benefits
-
A new traffic signalised intersection at Scarborough Beach Road. -
Ease traffic congestion and reduced traffic times.
-
Provision of a safe route for people riding and walking in the area.
-
Improve accessibility to the Stirling City Centre.
-
New shared paths along Stephenson Avenue.
-
Improved streetscaping in the area.
Gallery
-
Artwork under Stephenson Avenue by WA artists David Ledger and Joanne Clark. Inspired by Stirling’s market garden heritage.
-
The new Mitchell Freeway PSP connection between Civic Place and Telford Crescent is now opened.
-
The new bridge and east-west connection transforming journeys between Innaloo, Stirling and Osborne Park.
-
Video: Reshaping WA Report (Oct 2025). The Stephenson Avenue Extension is making good progress.
-
Progress on the new Stirling Bus Interchange.
-
Video: Pedestrian bridge installation.
-
The first artwork on the project features designs by Noongar artists David Jones and Kamsani Bin Salleh.
-
A new southbound on-ramp to the Mitchell Freeway is now open.
-
Stephenson Avenue Interchange Bridge now spanning across Mitchell Freeway.
-
The Stephenson Avenue Interchange Bridge and Stirling Station Bus Interchange Bridge is being incrementally ‘launched’ (pushed out) over the Mitchell Freeway.
-
The Stephenson Avenue Extension is now over 40 per cent complete.
-
Video: Learn more about the Stephenson Avenue Extension Project.
-
Aerial view of the Stephenson Avenue Extension.
-
View of early works on the project.
-
Stephenson Avenue Extension - Scarborough Beach Road to Sarich Court.
Project map
Detour options
-
Cedric Street Southbound Off-Ramp Permanently Closed - From Fri 14 Nov 2025
The temporary Cedric Street southbound off-ramp from Mitchell Freeway has permanently closed to enable construction of the new southbound off-ramp to continue safely. Access to Innaloo, Stirling and surrounding areas will temporarily be via the following alternative routes until the new Stephenson Avenue southbound off-ramp is operational.
- To access Innaloo and northern Stirling - exit earlier at the Karrinyup Road southbound off-ramp.
- To access Osborne Park and southern Stirling - exit later at the Hutton Street southbound off-ramp.
See Main Roads Travel Map for the most up-to-date information.
Plan your journey
Avoid disruptions to your journey and plan your trip
Go to Transperth
Go to Google maps
Main Roads Travel Map
138 138
enquiries@mainroads.wa.gov.au
Project information at Main Roads WA