Farming and agricultural vehicles

Agricultural zones and vehicle limits

Oversize and/or Overmass agricultural vehicles legally operate at different dimensions across four distinct agricultural zones in Victoria.


To identify Victoria’s agricultural vehicle zones and to appreciate the legal maximum allowable dimensions and mass limits, please take the time to review both the zones and their boundaries (noting that roads that are the boundary default to the greater dimension allowance).

Table 1 outlines the zones, and the areas within them, table 2 shows maximum dimensions within these zones, and table 3 shows the mass limits applying to all vehicles within this class.

Zones and mass limit tables

Table 1

ZoneWidthArea
Zone 12.5 metresMountainous and Otway
Zone 23.7 metresMelbourne and Geelong Urban
Zone 35.0 metresParts of the Bellarine Peninsula
Zone 46.5 metresBroad-Acre

Table 2

Exempted dimension requirementZone & Maximum Dimension Limits (metres)
Zone 1Zone 2Zone 3Zone 4
Single length vehicle15.015.015.015.0
Articulated vehicle length19.019.019.019.0
Combination length25.025.025.035.0
Agricultural implement length16.016.020.025.0
Vehicle or Combination Height5.05.05.05.0
Vehicle or Combination Width2.53.75.05.0
Single vehicle rear overhang5.55.55.55.5
Auger and Conveyor rear overhang8.08.09.010.0
Implement rear overhang5.55.55.56.5
Harvester rear overhang5.55.55.56.5

Note: Zone 2 increase from 3.5 metres wide to 3.7 metres wide in the new National Notice.  All other dimensions remain as they are.

Zone 3 currently covers a small section of Victoria (the Bellarine Peninsula). Zone 3 dimensions will also be used in the future as a way of creating a buffer between Zones 2 and 4 as well as cases where Zone 1 and 4 share a common border.

Agricultural implements that are agricultural trailers are restricted to a width limit of 3.0 metres in Zones 2, 3 and 4.  Remember, an agricultural trailer is a trailer built exclusively for agricultural purposes that carries a load and includes comb trailers, mother bins, sprayers and silage trailers.

Conditional Mass limits

The mass of an agricultural vehicle or combination operating under the National Notice must not exceed:

  • 45.0 tonnes; or
  • the mass of a single axle or axle group in Table 3 below.

Table 3

Number and width of tyres on an axleSingle axle mass limit (tonnes)Axle group mass limit (tonnes)
Axle fitted with 2 tyres and a tyre width less than 16 inches (406mm)10.020.0 on tandem axle group;27.0 on tri-axle group
Axle fitted with 2 tyres and a tyre width at least 16 inches (406mm)12.024.0 on tandem axle group
Axle fitted with 4 tyres and a ground contact width less than 2.51m9.0N/A
Axle fitted with 4 tyres and a ground contact width at least 2.51m but not more than 3.5m10.5N/A
Axle fitted with 4 tyres and a ground contact width more than 3.5m12.0N/A