Published on Friday, 15 May 2026 at 1:09:05 PM
Our Vision
The Great Eastern Highway and Seaborne Street intersection upgrade will create a safer, more efficient junction for the Parkerville community.
The project will improve traffic flow, enhance safety for all road users, and support the growing needs of the area while balancing infrastructure improvements with environmental care.
What's Planned Project Timeline Community Engagement Have Your Say FAQs News and Updates Documents and Resources Contact
Why This Project Matters
The upgrade of the Great Eastern Highway and Seaborne Street intersection is a key infrastructure project for the Parkerville area. This busy junction serves local residents, commuters, and emergency services travelling along Great Eastern Highway.
Improving this intersection will:
- Improve traffic flow and reduce congestion
- Support the growing Parkerville and Mundaring community
- Provide safer access for emergency services
What’s Planned
The project includes several key infrastructure improvements:
- Intersection upgrade works at Great Eastern Highway and Seaborne Street
- Land acquisition of a small portion of land in Parkerville
- Service relocations to accommodate the new intersection design
- Some tree clearing on the western side of Seaborne Street
- Revised drainage design to minimise vegetation clearing impact
Main Roads Western Australia has revised the drainage design specifically to reduce the amount of tree clearing required. Environmental assessments are being conducted, and a Clearing Assessment Report will be published for public comment.
Project Timeline
- Detailed design, approvals and project planning continue.
- Major civil construction works commence for the intersection upgrade.
Community Engagement
The Shire recognises the importance of keeping the community informed about this project. Main Roads Western Australia and the Shire of Mundaring are committed to engaging with affected residents and stakeholders throughout all phases of the project.
Activities to date included:
- Letter drops were distributed to affected residents in May 2025.
- An online submission period was held between May and June 2025, providing the community with an opportunity to review the proposal and provide feedback.
- The project has received approval from the Department of Water and Environmental Regulation (DWER).
- Early works, including partial native vegetation clearing and Telstra/NBN service relocation works, are planned to commence in late 2026.
- Major civil construction works are now anticipated to commence in the 2028/2029 financial year.
Have Your Say
Residents can provide feedback or ask questions about the project by contacting the Shire or visiting our consultations page.
Your feedback will help inform project updates and ensure the community's needs are considered throughout the delivery of this project.
Frequently Asked Questions
Will there be tree clearing?
Yes, some tree clearing will be required on the western side of Seaborne Street. Main Roads has revised the drainage design to minimise this impact. A Clearing Assessment Report will be published for public comment before any clearing occurs.
Will I be affected by land acquisition?
Main Roads WA is finalising the acquisition of a small portion of land at 50 Seaborne Street, Parkerville. Affected landowners will be contacted directly and have the opportunity to discuss the project with Main Roads representatives. Native vegetation clearing has been reduced to the extent practicable, with all cleared areas being utilised for road safety improvement works and associated activities
How long will construction take?
Construction timing will be confirmed closer to the commencement date. Service relocations will need to be completed before main construction works begin.
Will there be traffic disruptions?
Traffic management arrangements will be communicated to the community before construction commences. The Shire and Main Roads will work together to minimise disruptions.
News and Updates
Environmental Outcomes
The project team has worked to reduce the amount of native vegetation clearing required for the intersection upgrade wherever practicable. In a positive environmental outcome, cleared trees and vegetation are proposed to be provided to the Kaarakin Black Cockatoo Conservation Centre for habitat and conservation purposes, helping support the ongoing care and protection of Western Australia's black cockatoo species, subject to final confirmation.
Documents and Resources
Key project documents will be available online as the project progresses, including:
- Clearing Assessment Report (when published)
- Community information updates.
Contact
For more details or questions please contact:
Customer & Stakeholder Engagement Specialist
Sam Cranswick
Email: projecthub@mundaring.wa.gov.au
Phone: (08) 9290 6828
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