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Multi-combination vehicles

The National Heavy Vehicle Regulator (NHVR) has been established to administer the new Heavy Vehicle National Law 2012, which is scheduled to commence on 10 February 2014. Once fully established, the NHVR will be a one-stop-shop for the majority of your heavy vehicle business.

This page relates to business that will fall under the responsibility of the NHVR once the new law commences. For more information on when the new law will commence and how these changes may affect you, please visit our NHVR information page and the National Heavy Vehicle Regulator website.

Note: Queensland legislation no longer requires that guidelines be carried in the vehicle.

The Guideline for Multi-combination Vehicles in Queensland, Form 1, Version 10 explains the conditions under which road trains (including B-triples, AB-triples, BAB-quads, ABB-quads and prime mover/semitrailer combinations towing one converter dolly) or B-doubles may be used on roads in Queensland.


Maps are provided in portable document format (PDF). These maps indicate the roads approved for the relevant multi-combination vehicle. The legend explains how the routes are identified and should be used in conjunction with the maps.

Applying for B-double routes

To apply for B-doubles routes not listed in the maps, complete the B-double Additional Route Applicaton form (F3115) and forward to:

Heavy Vehicle Access
Department of Transport and Main Roads
PO Box 70, Spring Hill, Queensland 4000.
Text available under Creative Commons Attribution-Non Commercial-No Derivatives 3.0 Australia (CC BY-NC-ND 3.0) licence
Last updated
19 April 2015