Draft Roll-Coupling Policy – Feedback

Help shape the Roll-Coupling Policy

Main Roads Heavy Vehicle Services is seeking your input on the draft Roll-Coupling Policy and proposed implementation, as outlined below:

1. All trailers used in Non-PBS RAV configurations built after 1 January 2028 will need to be fitted with the prescribed Roll-Coupling.
2. Operators are encouraged to fit the Roll-Coupling to their RAV's, regardless of age, particularly those identified as high risk combinations.
3. Operators involved in multiple rollover events may be directed by Main Roads to fit the prescribed Roll-Coupling to their fleet, within a specified time frame to retain their WA Heavy Vehicle Accreditation.

Whether you’re an operator, manufacturer, engineer or designer, your feedback will help us understand how the policy may impact real-world vehicle design, manufacturing and operations.

This quick survey should only take a few minutes to complete. You can provide as much or as little detail as you like — all feedback is valuable.

The draft policy is available under the ‘Documents’ section on this page for your review.

Consultation is open from 4 June to 3 July 2026.