Higher Mass Limits (HML)

HML provides a significant increase in the productivity of road freight transport vehicles. HML access in NSW is available by enrolling the vehicle under the Intelligent Access Program (IAP) with Roads and Maritime Services and operating under the current New South Wales Higher Mass Limits Declaration.

HML eligible vehicles

In NSW, the vehicles types eligible to operate at HML are:

HML access on NSW roads is dependent on the vehicle type of operation enrolled in the IAP and granted under the current New South Wales Higher Mass Limits Declaration (Please note that this Declaration does not apply to Performance Based Standards (PBS) vehicles, these vehicles still require a permit to operate at HML).

New South Wales Higher Mass Limits Declaration

The current New South Wales Higher Mass Limits Declaration provides HML access for eligible short combinations, B-doubles, Type 1 A-double road trains, AB-triples, B-triples and Modular B-triples under a Notice. It is a condition of the Declaration that all vehicles operating at HML in NSW be enrolled in the NSW Intelligent Access Program (IAP) and comply with the conditions contained in Schedule 5 of Heavy Vehicle (Mass, Dimension and Loading) National Regulation.

The NSW Higher Mass Limit Factsheet provides further information on the types of heavy vehicles authorised to operate at HML under the Declaration.

HML eligibility requirements

Operators must ensure that the following conditions are met before operating at HML in NSW.

Vehicles must:

  • Not exceed the manufacturer's gross vehicle mass for the rigid truck or gross combination mass for the prime mover
  • Have all axles in the combination operating at HML fitted with road friendly suspension (with the exception of the steer axle) certified in accordance with the Commonwealth Vehicle Standards Bulletin (VSB) 11 
  • If the vehicle or combination has a tri-axle group, the prime mover must be a nominated vehicle of an operator who holds accreditation for the Mass Management module of the NHVAS and have an appropriate label affixed to the vehicle on or adjacent to the driver’s door of the prime mover
  • Comply with all conditions and mass limits for the vehicle contained in the current New South Wales Higher Mass Limits Declaration
  • Comply with all conditions for the vehicle type contained in the current relevant National Class 2 Heavy Vehicle Authorisation
  • Be enrolled in the IAP with Roads and Maritime to operate at HML.

Road Friendly Suspension (RFS) requirements

All axle groups in an eligible vehicle operating at HML must be fitted with RFS models certified in accordance with VSB 11 – Certification of road friendly suspension, as issued by the Commonwealth Department of Transport and Regional Services. A listing of certified RFS is available at the Department of Infrastructure and Regional Development website.

Operators must ensure that axle groups operating at HML are fitted with RFS, and check that a valid sticker, label or plate with the RFS Certificate Number is affixed to the suspension system, or on a suitable location on the vehicle near the installed suspension or the vehicle compliance plate.

National Heavy Vehicle Accreditation Scheme (NHVAS) requirements

Vehicles operating at HML must:

  • Be nominated vehicles of an operator who is enrolled in the Mass Management module of the NHVAS if the vehicle or combination has a tri-axle group. The prime mover must be a nominated vehicle for the Mass Management module of the NHVAS and has an appropriate label affixed to the vehicle on or adjacent to the driver’s door of the prime mover
  • Comply with in-service and maintenance requirements for road friendly suspension under the NHVAS.

NHVAS is a national scheme managed by the National Heavy Vehicle Regulator (NHVR) and recognised in all jurisdictions. To obtain accreditation under the NHVAS please contact the NHVR on 1300 MYNHVR (1300 696 487).

Enrol in the IAP

IAP is a road access condition for HML vehicles in NSW, this applies even when only some axle groups in an eligible vehicle are operating at HML.

To operate at HML, operators must enrol their vehicle(s) in the relevant IAP application(s) depending on the vehicle type of operation and carry in the vehicle an IAP Certificate of Enrolment issued by Roads and Maritime for the vehicle type of operation. Please note: If the vehicle is already enrolled in the IAP in another jurisdiction, the vehicle will still be required to separately enrol in the IAP with Roads and Maritime.

Operators must follow these steps to enrol vehicle in the IAP with Roads and Maritime to operate at HML:

  1. For eligible HML vehicles enrol via Roads and Maritime online services:
  2. Roads and Maritime will send an interim Intelligent Access Condition (IAC) to the email address you have provided once your IAP application has been received and assessed.
    • The interim IAC contains details of your selected IAP application.
  3. Select a certified IAP service provider and provide them with your interim IAC. The certified IAP service provider will install the IAP equipment in your vehicle.
  4. Your chosen certified IAP service provider will inform Roads and Maritime once the IAP equipment has been installed and Roads and Maritime will send the approved IAC to your chosen IAP service provider for monitoring of your vehicle.
  5. Roads and Maritime will send a NSW IAP Certificate of Enrolment to the email address you have provided once the IAC has been approved.
    • Your vehicle will now be enrolled in the IAP.
  6. Your vehicle can now legally operate in NSW at HML for the vehicle type of operation enrolled in the IAP and contained in the current New South Wales Higher Mass Limits Declaration.

All enrolments in the IAP are processed free of charge.

HML network access

HML network access is dependent on the vehicle type of operation enrolled in the NSW IAP and contained in the current New South Wales Higher Mass Limits Declaration.

A number of network maps and/or lists of approved roads are available for HML vehicles enrolled in the IAP in NSW:

B-double or road train access conditions

Operators are advised that all B-double or road train access conditions also apply to HML approved roads and route requests. Consideration should be given to B-double or road train access arrangements and/or conditions when considering HML access for these combinations.

Requesting access to non approved HML roads

Operators can request assessment of roads that are not currently approved for HML access by applying to the NHVR

Vehicles must not operate on requested routes until they are stated as approved roads on the access permit or until the approved routes appear on the relevant IAP maps or approved road lists.

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