Tonkin Highway Extension and Thomas Road Upgrade - Proposed Temporary Road Closure
Published on Thursday, 12 March 2026 at 4:09:03 PM
In accordance with Section 3.50 of the Local Government Act 1995, notice is hereby given that the Shire of Serpentine Jarrahdale is required to temporarily close Hopkinson Road between Abernethy Road and Devon Court.
These changes will take effect from April 2026 to October 2026 as part of the Tonkin Highway Extension and Thomas Road Upgrade (THETRU) Project and associated works. This closure will follow the re-opening of the Hopkinson Road and Jersey Road intersection.
Project Overview
As part of the THETRU Project, Tonkin Highway is being extended 14 kilometres from Thomas Road to South Western Highway as a four-lane dual carriageway. To enable service relocation works, drainage upgrades, foundation preparation for the Tonkin Highway bridge over Abernethy Road and permanent construction of the Abernethy Road and Hopkinson Road roundabout, Hopkinson Road will be temporarily closed between Abernethy Road and Devon Court.
Abernethy Road will remain open during these works. Access to properties on Devon Court, Charolais Court and Hopkinson Road will be maintained via the proposed detour.
This closure is intended to:
- enhance road safety; and
- improve long-term traffic efficiency.
Bushfire safety and emergency response are key considerations in the planning process. The project team is working closely with the Shire of Serpentine Jarrahdale and the Department of Fire and Emergency Services (DFES) to ensure emergency access routes are maintained during construction and are incorporated into the final road design.
Inspection of Plans
Plans detailing the proposed closures and new access routes can be seen below or online at www.sjshire.wa.gov.au.
Submissions
Written submissions or feedback regarding the proposed closures may be submitted to the Shire by 5pm, 3 April 2026.
Submissions should be addressed to:
Chief Executive Officer
Shire of Serpentine Jarrahdale
6 Paterson Street, Mundijong WA 6123
Email: info@sjshire.wa.gov.au
For further information, please contact the Shire on (08) 9526 1111 or email info@sjshire.wa.gov.au.