Permits, Orders and Schemes

A permit or order is required from Main Roads when driving a Restricted Access Vehicle (RAV) on a public road in Western Australia.

Oversize overmass heavy vehicle Convoy crossing Fortescue River Bridge

Do you require a permit?

Generally speaking, a vehicle or vehicle combination exceeding any of the following limits is a Restricted Access Vehicle (RAV) and must be operated in accordance with a permit or order.

  • 2.5m in width
  • 4.3m in height
  • 12.5m in length for a rigid vehicle
  • 19m in length for a combination
  • 42.5t gross mass
  • 9t on a single axle
  • 6t on a single steer axle
  • 10t on a twin steer axle group (non-load sharing suspension)
  • 11t on a twin steer axle group (load sharing suspension)
  • 16.5t on a tandem axle group
  • 20t on a tri or quad axle group

Payments and Refunds

Payments for permits and other heavy vehicle products or services can be made by a variety of methods. The below documents outline the relevant payment, refund and permit trasnfer information.

Permit, Order and Scheme Information

aerial view of a Heavy Vehicle transporting a large wind blade through a roundabout

OSOM Single Trip Permits

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Oversize and Overmass Heavy Vehicle driving on a road with a large tank as the load

OSOM Class 1 RAV Period Permits

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truck with oversize overmass load crossing a bridge on a regional road with hills in the background

OSOM Assorted Period Permits

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side view of an All Terrain Crane Truck which is a special purpose vehicle and it has it's mast slightly raised

Special Purpose Vehicles

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Quad Road Train travelling along a road away from the photographer

Accredited Mass Management Scheme (AMMS)

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Yellow Heavy Lift Tow Truck towing a teal truck along a road

Heavy Lift Tow Truck

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Road Train with a load of large tyres pictured from the rear of the vehicle

Oversize Road Trains and B Doubles

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Road Train carrying a Load of Hay entering a road

Oversize Divisible Products

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side view of a long Road Train with four trailers parked on the side of a road

Road Train with Long Trailers

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 Road Train with two trailers with pink shipping containers parked in a carpark

Containerised Freight

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Sheep in a truck trailer

Concessional Livestock

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heavy vehicle with two trailers and the ocean in the background

Harvest Mass Management Scheme (HMMS)

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Heavy Vehicles in traffic from rear and side view

Residential Construction Products

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Blue road train towing three blue containers driving along a road in front of a shipping port with a stack of sea containers

Short Triple Road Train

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Australian Army Truck with trailer towing a tank driving along a road

Australian Defence Force (ADF)

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Long Heavy Vehicle with four trailers, classed as a PBS vehicle, parked on a dirt road

Performance Based Standards (PBS)

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Long yellow truck pictured driving along road from above

Specific Access Permits

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Acknowledgement of Country

The Government of Western Australia acknowledges the traditional custodians throughout Western Australia and their continuing connection to the land, waters and community. We pay our respects to all members of the Aboriginal communities and their cultures; and to Elders both past and present.

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