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Roll-Coupling Policy – Have Your Say
In recent years, WA has seen a considerable increase in heavy vehicle rollover incidents. As a result, Main Roads Heavy Vehicle Services (HVS) is developing a Roll-Coupling Policy to support the safe and consistent design and operation of heavy vehicle combinations across Western Australia.
To help develop this, we partnered with Tiger Spider, an independent transport engineering company with extensive experience in heavy vehicle safety performance, who carried out detailed research, testing and analysis. This has been used to shape a draft policy and design approach — and now we’d like to hear from you.
Whether you're a vehicle manufacturer, engineer, designer or operator, your experience and insight are important in making sure this policy works in practice.
The consultation is open from 4 June to 3 July 2026 and taking part is easy:
✅ Step 1: Read the draft policy You’ll find it in the ‘Documents’ section on the right-hand side of this page
✅ Step 2: Learn more (optional) Watch the webinar to hear directly from the engineers about the research and findings. You can register your interest below.
✅ Step 3: Share your feedback Add your comments by selecting the 'feedback' button below.
Roll-Coupling Policy – Have Your Say
In recent years, WA has seen a considerable increase in heavy vehicle rollover incidents. As a result, Main Roads Heavy Vehicle Services (HVS) is developing a Roll-Coupling Policy to support the safe and consistent design and operation of heavy vehicle combinations across Western Australia.
To help develop this, we partnered with Tiger Spider, an independent transport engineering company with extensive experience in heavy vehicle safety performance, who carried out detailed research, testing and analysis. This has been used to shape a draft policy and design approach — and now we’d like to hear from you.
Whether you're a vehicle manufacturer, engineer, designer or operator, your experience and insight are important in making sure this policy works in practice.
The consultation is open from 4 June to 3 July 2026 and taking part is easy:
✅ Step 1: Read the draft policy You’ll find it in the ‘Documents’ section on the right-hand side of this page
✅ Step 2: Learn more (optional) Watch the webinar to hear directly from the engineers about the research and findings. You can register your interest below.
✅ Step 3: Share your feedback Add your comments by selecting the 'feedback' button below.
Share Register for Webinar: Roll Coupling Policy on FacebookShare Register for Webinar: Roll Coupling Policy on TwitterShare Register for Webinar: Roll Coupling Policy on LinkedinEmail Register for Webinar: Roll Coupling Policy link
Main Roads WA is developing a new Roll-Coupling Policy to support safe and consistent use of roll-coupled heavy vehicle combinations.
To help with this work, Main Roads engaged Tiger Spider, an independent transport engineering company, to carry out technical research and provide advice.
Main Roads WA is developing a new Roll-Coupling Policy to support safe and consistent use of roll-coupled heavy vehicle combinations.
To help with this work, Main Roads engaged Tiger Spider, an independent transport engineering company, to carry out technical research and provide advice.
About the webinar
Tiger Spider will explain:
What roll-coupling is and how it works
How they carried out their research and testing
The key findings from their work
How this has been used to shape the draft policy and design guidance
This webinar is open to anyone involved in the heavy vehicle industry, including operators, manufacturers, engineers and designers.
Event details
Date: Wednesday, 17 June Time: 10:30am – 12:00pm (AWST)
