National Class 3 Heavy Vehicle 4.6m High by Construction Semitrailer Dimension Exemption Notice 2024 (No.1)

Administered by Department of Infrastructure, Transport, Regional Development, Communications, Sport and the Arts

Legislation au C2024G00105 In force Gazette

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NATIONAL HEAVY VEHICLE LAW

National Class 3 Heavy Vehicle 4.6m High by Construction Semitrailer Dimension Exemption Notice 2024 (No.1)

  1. Purpose

 

The purpose of this notice is to exempt a stated category of class 3 heavy vehicles from the height limit stated in section 8 of Schedule 6 of the Heavy Vehicle (Mass, Dimension and Loading) National Regulation (the National Regulation).

2.       Authorising Provision

 

This notice is made under Section 117 of the Heavy Vehicle National Law (HVNL).

 

3.       Title

 

This Notice may be cited as the National Class 3 Heavy Vehicle 4.6m High by Construction Semitrailer Dimension Exemption Notice 2024 (No.1).

 

4.       Commencement

 

This Notice commences on 10 February 2024.

 

5.       Expiry

 

This Notice expires on 9 February 2029.

 

6.       Definitions

 

1)      Unless otherwise stated, words and expressions used in this Notice and its Schedules have the same meanings as those defined in the HVNL.

 

2)      In this Notice and its Schedules:-

4.6m high semitrailer means a semitrailer, used in a combination, that:

a)      is constructed higher than 4.3m but not constructed higher than 4.6m; and

b)      does not include a class 1 heavy vehicle.

Load support height means the perpendicular distance from the ground to the level at which a load is supported on a semitrailer. This includes:

a)      the area ordinarily considered a deck; and

b)      the floor of a bin or tank that is integral to the trailer; and

c)       any other load bearing points such as the frame of a skeleton trailer or vehicle carrier; and

d)      any area above an axle group under a fifth wheel coupling, measured from the ground to the level at which the towed unit is supported by the coupling.

Participating jurisdiction means New South Wales, Queensland, South Australia and Victoria.

Semitrailer length means the distance from the front of the semitrailer to the rear of the semitrailer, not including any load.

7.       Application

 

This notice applies to 4.6m high semitrailers operating in participating jurisdictions.

 

8.       Exemption from prescribed dimension requirements

 

1)      This notice exempts 4.6m high semitrailers from the following dimension requirements specified in Schedule 6 of the Regulation:

 

a)      Section 8(1)(d) - height.

 

9.       Condition - Stated Routes, Areas and Networks

 

A 4.6m high semitrailer operating under this notice may access the stated routes, areas and networks specified in the Schedules of each participating jurisdiction.

 

10.   Conditions - General

 

1)      Each 4.6m high semitrailer that is constructed higher than 4.3m must comply with the following mass limits:

 

a)      for a combination consisting of a prime mover and semitrailer, the mass of the combination must not be more than 90% of the mass requirements specified under Schedule 1 of the MDL;

 

b)      for a combination consisting of a B-double or a road train, the mass of the combination must not be more than 90% of the lesser of:

  1. the prescribed mass requirements under Schedule 1 of the MDL; or
  2. the mass limits specified under the class 2 heavy vehicle authorisation for the B-double or road train, if the relevant class 2 heavy vehicle authorisation specifies a lesser mass limit.

 

2)      The load support height of any given 4.6m high semi-trailer that is part of a combination operating under this Notice must not exceed 1.2m for more than 50% of the trailer length.

 

3)      A 4.6m high semitrailer that is constructed higher than 4.3m must have an air suspension system with effective dampers fitted to the vehicle.

 

4)      The driver and operator of a 4.6m high semitrailer must comply with all conditions set out in the Schedule for a participating jurisdiction when the vehicle is being used in the jurisdiction to which that Schedule applies.

 

Peter Austin

Director, Policy Implementation

National Heavy Vehicle Regulator


Schedule 2: New South Wales

  1. Application

 

This Schedule applies in New South Wales.

 

2.       Conditions - Stated areas or routes

 

1)      A combination consisting of a prime mover and a 4.6m high semitrailer may use the routes and areas published in “Restricted Access Vehicle maps and lists” for New South Wales.

 

2)      A B-double that includes a 4.6m high semitrailer may only use a route described in 1) if the route is also an approved B-double route as set out in the National Class 2 Heavy Vehicle B-double Authorisation Notice.

Note: This means the route must be approved for use by both 4.6m high semitrailers and B-doubles.

3)      A road train that includes a 4.6m high semitrailer may only use a route described in 1) if the route is also an approved road train route as set out in the NSW Schedule of the National Class 2 Heavy Vehicle Road Train Authorisation Notice.

Note:  This means the route must be approved for use by both 4.6m high semitrailers and road trains.

3.       Conditions - General

 

1)      A B-double that includes a 4.6m high semitrailer must comply with any relevant conditions set out in the National Class 2 Heavy Vehicle B-double Authorisation Notice.

 

2)      A road train that includes a 4.6m high semitrailer trailer must comply with any relevant conditions set out in the National Class 2 Heavy Vehicle Road Train Authorisation Notice.


Schedule 3: Queensland

  1. Application

 

This Schedule applies in Queensland.

 

2.       Conditions - Stated areas or routes

 

1)      A combination consisting of a prime mover and a 4.6m high semitrailer may use all roads in Queensland except where there is insufficient height clearance for the combination to pass without striking or damaging any road infrastructure.

Note:  The driver of the 4.6m high semitrailer must assess the suitability of a road prior to operating the vehicle on that road. The roads used must be continually monitored to ensure sufficient clearance for the vehicle exists.

2)      A B-double that includes a 4.6m high semitrailer may only use a route described in 1) if the route is also approved in the National Class 2 Heavy Vehicle B-double Authorisation Notice.

Note:  This means the route must be approved for use by both 4.6m high semitrailers and B-doubles.

3.       Conditions - General

 

1)      A B-double that includes a 4.6m high semitrailer must comply with any relevant conditions set out in the B-double notice.

 

2)      Any load carried under this Notice must be loaded in a way that maximizes continuous contact the lowest deck of the trailer.

 

3)      A 4.6m high semitrailer cannot be used as a component of a road train.

 

Note: Under the Heavy Vehicle National Law, a road train includes a B-triple

Schedule 4: South Australia

  1. Conditions - Stated areas or routes

 

1)      A combination consisting of a prime mover and 4.6m high semitrailer (semitrailer combination) may use all roads in South Australia.

 

2)      A B-double that includes a 4.6m high semitrailer may only use a route approved in the National Class 2 Heavy Vehicle B-double Authorisation Notice.

 

3)      A road train that includes a 4.6m high semitrailer trailer may only use a route approved in the National Class 2 Heavy Vehicle Road Train Authorisation Notice (the Road Train Notice).

 

2.       Conditions - General

 

1)      In addition to complying with the requirements of this Schedule, a B-double that includes a 4.6m high semitrailer must comply with the B-double notice.

 

2)      In addition to complying with the requirements of this Schedule, a road train that includes a 4.6m high semitrailer trailer must comply with the road train notice.

 

3)      Before starting the journey, the driver or operator must;

a)      must comply with the specified route, area and structure restrictions published in the Consolidated Table of Limited Access Locations in South Australia published on the ‘Approved Areas or Routes’ section of the Department for Infrastructure and Transport website; and

b)      may be required to consult and obtain consent from third party entities who manage utilities which may be impacted by over height vehicles.

 

Note : Some routes in the Adelaide Metropolitan Area have height restrictions less than 4.3m.

Contact details for SAPN, Telstra and Optus are available on the NHVR website.

Schedule 5: Victoria

  1. Application

This Schedule applies in Victoria.

2.       Conditions - Stated areas or routes

 

1)      A combination consisting of a prime mover and a 4.6m high semitrailer may use all roads in Victoria.

 

2)      A B-double that includes a 4.6m high semitrailer may only use a route approved in the Victorian Schedule of the National Class 2 B-Double Authorisation Notice.

 

3)      A road train that includes a 4.6m high semitrailer trailer may only use a route approved in the Victorian Schedule of the National Class 2 Road Train Authorisation Notice.

 

3.       Conditions - General

1)      A B-double that includes a 4.6m high semitrailer must comply with any relevant conditions set out in the National Class 2 B-Double Authorisation Notice.

 

2)      A road train that includes a 4.6m high semitrailer trailer must comply with any relevant conditions set out in the National Class 2 Road Train Authorisation Notice.

 

 

Overview

The National Class 3 Heavy Vehicle 4.6m High by Construction Semitrailer Dimension Exemption Notice 2024 (No.1) was enacted to address the need for a specific exemption for 4.6-metre high semitrailers operating in certain jurisdictions under the Heavy Vehicle National Law (HVNL). This notice, made under Section 117 of the HVNL, aims to provide flexibility in the height requirements for these semitrailers in participating jurisdictions, which include New South Wales, Queensland, South Australia, and Victoria. The notice exempts these semitrailers from the height limits specified in section 8 of Schedule 6 of the Heavy Vehicle (Mass, Dimension and Loading) National Regulation, allowing them to operate under certain conditions and specified routes within the participating jurisdictions. The notice is intended to facilitate more efficient transport operations while maintaining safety and structural integrity standards.

Scope and Application

The National Class 3 Heavy Vehicle 4.6m High by Construction Semitrailer Dimension Exemption Notice 2024 (No.1) applies to 4.6m high semitrailers operating within the participating jurisdictions of New South Wales, Queensland, South Australia, and Victoria. These vehicles are exempt from the height limit specified in section 8 of Schedule 6 of the Heavy Vehicle (Mass, Dimension and Loading) National Regulation. The exemption allows for these semitrailers to operate under certain conditions, including adherence to specified mass limits, load support height restrictions, and the installation of an air suspension system with effective dampers. Drivers and operators of these vehicles must also comply with the conditions set out in the respective schedules for each participating jurisdiction, which include specified routes, areas, and networks that are approved for use by these vehicles. The notice imposes additional conditions for B-doubles and road trains that include 4.6m high semitrailers, ensuring that they comply with relevant authorisation notices and conditions.

Key Provisions

The National Class 3 Heavy Vehicle 4.6m High by Construction Semitrailer Dimension Exemption Notice 2024 (No.1) provides exemptions from certain height requirements for 4.6m high semitrailers operating in specified jurisdictions. The Notice, made under section 117 of the Heavy Vehicle National Law (HVNL), exempts these semitrailers from the height limit outlined in section 8 of Schedule 6 of the Heavy Vehicle (Mass, Dimension and Loading) National Regulation. This exemption applies to semitrailers that are higher than 4.3m but not higher than 4.6m and excludes class 1 heavy vehicles. The Notice specifically targets 4.6m high semitrailers operating in New South Wales, Queensland, South Australia, and Victoria, which are collectively referred to as participating jurisdictions. The Notice imposes several obligations on the parties it governs. Firstly, 4.6m high semitrailers must comply with mass limits; for a prime mover and semitrailer combination, the mass must not exceed 90% of the mass requirements specified under Schedule 1 of the Mass, Dimension and Loading (MDL) regulation. For B-doubles or road trains, the mass limit must also be 90% of the lesser of the prescribed mass requirements or the mass limits specified under the class 2 heavy vehicle authorisation. Furthermore, the load support height of any 4.6m high semi-trailer must not exceed 1.2m for more than 50% of the trailer length. These semitrailers must also be equipped with an air suspension system with effective dampers. Additionally, drivers and operators must adhere to all conditions set out in the Schedule for the participating jurisdiction where the vehicle is being used. Failure to comply with the conditions and requirements of this Notice may result in various penalties and consequences. Although the Notice does not explicitly state specific penalties, breaches of the Heavy Vehicle National Law, under which this Notice is made, can result in both civil and criminal penalties. Civil penalties may include fines up to $55,000 for individuals and $275,000 for bodies corporate, as well as potential imprisonment. Criminal penalties can also be imposed, depending on the severity of the breach, with potential imprisonment terms that vary according to the nature of the offence. Additionally, operators may face suspension or revocation of their heavy vehicle national law accreditation, which is essential for operating heavy vehicles under the law.

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Sourced from the Federal Register of Legislation at 26 August 2026. For the latest information on Australian Government law please go to https://www.legislation.gov.au.