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 / 35A 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.