Amendments for B-triple Road Train Combinations - Effective 9 September 2022

Information from Department of Transport & Main Roads, Heavy Vehicle Unit

The Department of Transport and Main Roads (TMR) has recently made amendments to the Transport Operations (Road Use Management–Road Rules) Regulation 2009 (Queensland Road Rules) for B-triple road train combinations.

Changes from 9 September 2022 

• The definition of a B-triple road train combination in the Queensland Road Rules will align with the Heavy Vehicle National Law 
• B-triple road train combinations will be permitted to travel at speeds of up to 100 km/h.

 Please note: all other road train combinations are only permitted to travel at speeds of up to 90 km/h.


B-triple definition

The definition of a B-triple road train combination in The Queensland Road Rules is a prime mover towing 3 semitrailers:

a)    the first semitrailer being attached directly to the prime mover by a fifth wheel coupling; and

b)    the second semitrailer being mounted on the rear of the first semitrailer by a fifth wheel coupling on the first semitrailer; and

c)    the third semitrailer being mounted on the rear of the second semitrailer by a fifth wheel coupling on the second semitrailer.