National Class 1 Agricultural Vehicle and Combination Mass and Dimension Exemption Notice

This page provides information on the National Class 1 Agricultural Vehicle and Combination Mass and Dimension Exemption Notice (the National Notice).

The National Class 1 Agricultural Vehicle and Combination Mass and Dimension Exemption Notice 2020 (No.1) | PDF, 828KB works in conjunction with the following documents that outlines additional operating conditions to those specified in the National Notice:

The National Notice was based on research conducted by Austroads and VicRoads, and developed in partnership with industry, participating state and territory road transport authorities and local road managers to provide better road access to agricultural vehicles.

Speed limits - Tow mass ratio and brake performance testing

The National Notice states speed limits for certain agricultural combinations. The speeds limits are based on the tow mass ratio between the hauling unit and the trailer. 

If an operator cannot determine the mass of the vehicles to calculate the tow mass ratio, then a simple braking test can be performed. 

Refer to Tow Mass Ratios for Agricultural Vehicles (PDF, 234KB) for the maximum operating speed for agricultural combinations and examples of tow mass ratio.

What is tow mass ratio

Tow mass ratio means the ratio of the mass of the towing vehicle (agricultural machine) to the combined mass of the towed implements and trailers, when all vehicles are coupled as part of a combination.

The mass of the vehicle, implements and trailers includes any load being carried.

Note: When calculating tow mass ratio, operators should weigh units of the combination when coupled. The mass of individual units may change when coupled to another vehicle, as mass can distribute across towed units in the combination.

Confirm your tow mass ratio with the Tow Mass Ratio Calculator (XLSX, 17KB).

What is brake performance testing 

A braking performance test is an alternate method to establish agricultural combinations speed limits when operating under the Notice.

A braking performance test is optional, and operators may choose to complete a brake performance test or comply with the tow mass ratio and speed limits in the Notice in Table 21 or page 6 of the operator's guide.

Upon successfully completing the braking performance test (see page 57 of the operator's guide), the testing operator must complete the declaration form on page 59 of the operator's guide. The driver of the tested agricultural combination must keep a copy of the declaration in the driving compartment of the agricultural machine when travelling.

Note: The braking performance test does not authorise the driver to exceed:

  • manufacturer's ratings
  • road rules requirements
  • mass limits or exempt road manager conditions within the Notice. 

Jurisdictional agricultural notices

There are currently 3 states that provide notices authorising the use of agricultural vehicles and combinations.

Operators must only operate under the National Notice or the current state notices for the entire journey. No 'mix-and-match' of provisions, exemptions, conditions or approved areas and routes is allowed.

Special information for Victoria 

Under the National Notice, Zone 2 widths have increased from 3.5m to 3.7m. 

Zones 1, 3 and 4 are not affected by the National Notice and remain the same as in the existing Victoria Class 1 Agricultural Vehicle Exemption Notice 2018 (No.3).

All access conditions provided by Victorian road managers have been transitioned into the Victoria Class 1 Agricultural Vehicle Exemption Notice 2018 (No.3) and reflected in the Victorian Oversize and Overmass Agricultural vehicles Network for class 1 Vehicles map. This map is regularly updated by the Victorian Department of Transport.

Current jurisdictional notices

Please note: We are working towards ending the notices in the table below. The jurisdictional agricultural notice will continue to remain in effect until it has been revoked.

State Notice
Qld

Queensland Agricultural Machines and Cane Bins Flotation Tyres Mass Exemption Notice 2017 (No. 1) (PDF, 1.2MB)

This notice provides jurisdictional access to agricultural machines and cane bin trailers fitted with flotation tyres to operate on roads in certain circumstances. Operators must carry this notice.


Queensland Class 1 Comb Trailer Dimension Exemption Notice 2017 (No. 1) (PDF, 742KB)

This notice provides jurisdictional access to agricultural machines or heavy vehicle towing a comb trailer that complies with Australian Design Rules (ADRs) from stated dimension requirements and agricultural speed limits. Operators must carry a copy of this notice.

SA

South Australia Class 1 Agricultural Vehicle Mass and Dimension Exemption Notice 2019 (No.1) (PDF, 667KB)

Provides jurisdictional access for tractors agricultural machines and agricultural combinations used for agricultural purposes that exceed a dimension or mass limit in South Australia.

Please note the following supporting documents for this notice:


South Australia Class 1 Rubber Tracked Tractor Mass and Dimension Exemption Notice 2019 (No.1) (PDF, 684KB)

Exempts rubber tracked tractors used for agricultural purposes from certain mass and dimension exemptions under the Heavy Vehicle National Law and allows access to roads in South Australia subject to the conditions specified in the notice.

Please note the following supporting documents for this notice:

Vic

Victoria Class 1 Agricultural Vehicle Exemption Notice 2018 (No.3) (PDF, 777KB)

This notice exempts certain agricultural vehicles from mass and dimension requirements.

Please note the following supporting document for this notice:

Jurisdictional notices that have been revoked

After 2 August 2021, operators will be unable to use the jurisdictional notices in the table below. This means that operation of the agricultural vehicles in these notices has transitioned to the National Notice.

Operators are advised to review the conditions of access in the National Notice. Where a vehicle or combination cannot comply with the Notice, the operator will need to apply for a permit.

State Notice
New South Wales
  • New South Wales Class 1 Agricultural Machine Combination Exemption Notice 2017
  • New South Wales Class 1 Agricultural Vehicles (Notice) 2015
  • New South Wales Class 1 Heavy Vehicle Combine Harvester Combination Exemption Notice 2015
  • New South Wales Class 1 Heavy Vehicle Grain Auger Combination Exemption Notice 2015
  • New South Wales Class 1 Agricultural Cotton Vehicle Exemption for Permitted Heavy Vehicles (Notice) 2016 (No. 1)
Queensland
  • Queensland Class 1 Agricultural Vehicle (Coastal Zone 1) Dimension Exemption Notice 2016
  • Queensland Class 1 Agricultural Vehicle (Northern Coastal Zone 1) Dimension Exemption Notice 2016
  • Queensland Class 1 Heavy Vehicles (Cotton Harvester) Mass and Dimension Exemption Notice 2017 (No.1)
  • Queensland Heavy Vehicle Class 1 Agricultural Vehicle (Bundaberg Region 5.0m wide)
Tasmania
  • Tasmania Class 1 Agricultural Vehicle Dimension Exemption Notice 2016

What happens if I have a permit that refers to a revoked notice?

You should check your permit to make sure the full journey is approved by the permit or by an active Notice.

A new permit is required if:

  • the existing permit doesn’t cover the full journey; or
  • the existing permit refers to a revoked notice (a permit may refer to a route that starts or ends at a network under a revoked notice); or
  • the combination does not comply with the National Class 1 Agricultural Vehicle and Combination Mass and Dimension Exemption Notice

If you need a permit, you will have to submit a new application through the NHVR Portal