Braking Systems for B-Doubles and Road Trains - Victoria


You must comply with one of the following Australian Design Rules (ADRs) if you manufacture a prime mover used in a B-double or a vehicle used in a road train:

  • second edition ADR 35A
  • third edition ADR 35.

If you operate a prime mover in a B-double that fulfils one of the following conditions, you must also have an anti-lock braking system complying with third edition ADR 64:

  • built after 1989
  • first used in a B-double after 1993
  • is used in a B-double that includes a road tank vehicle carrying dangerous goods.

If you operate or modify a heavy trailer used in a B-double or road train, you must comply with ADR 38.

Australian Design rule:

  • 35 specifies the braking requirements on commercial motor vehicles and larger passenger vehicles.
  • 38 specifies requirements for braking under both normal and emergency conditions for trailer brake systems.
  • 64 specifies additional design and construction requirements for hauling vehicles designed to be used in road trains and B-doubles.

Please consult the Contact Officer for more information and to ascertain the level of compliance that may be required.

Service type

Code of Practice

A code of practice is a set of rules which details how people in a certain industry should behave. A code of practice can be defined as a result of legislation or by industry regulators and bodies.

Act(s) name

Heavy Vehicle National Law Application Act 2013 Victoria

Regulation(s) name

Heavy Vehicle (General) National Regulation 2013 Victoria

Administering agency

National Heavy Vehicle Regulator

Contact details

Contact Email, Phone and Address Details for this service in simple two column table format, header then data.

Please use these contact details for help or more information:

General Enquiries

National Heavy Vehicle Regulator

Mailing address: PO BOX 492
Fortitude Valley, Queensland 4006
Queensland 7008
Phone: 1300 696 487
Fax: 07 3309 8777
Website: National Heavy Vehicle Regulator (Opens in new window)