What's happening
Stephenson Avenue Interchange now fully operational!
Last Friday, the new Stephenson Avenue northbound on ramp to Mitchell Freeway opened to road users.
This change means that the interchange is now fully connected to Mitchell Freeway, following the opening of the Stephenson Avenue bridge last December.
A reminder that the Cedric Street northbound on ramp has now temporarily closed until mid-2026 to safely complete ramp widening and intersection upgrade works.
Detours are in place via the new Stephenson Avenue northbound on ramp or the Karrinyup Road northbound on ramp. View traffic map below.
Please pay close attention to the changed traffic conditions, including new signage and line markings and exercise caution when merging onto Mitchell Freeway from the new Stephenson Avenue northbound on ramp.
For more information view our Frequently Asked Questions here.
During the adjustment period, you may need to allow for extra travel time initially while familiarising yourself with the new layout.
What’s next?
Staged traffic changes will continue into mid-2026 to complete finishing works such as ongoing pavement construction, shared paths and retaining walls. Changes include:
- The temporary closure of Cedric Street between Ellen Stirling Boulevard and Stephenson Avenue in May 2026.
- The full opening of Catspaw Road to Cedric Street.
- New shared path connections and Principal Shared Path infrastructure opening.
- Opening of the new Stirling Station Bus Interchange.
More detailed communications will be provided in the lead up to the changes.
traffic flow
connectivity
capacity