The define of Special Purpose Vehicles
Special Purpose Vehicles are vehicles that have not been designed and built for carrying a load or passengers on roads eg
- industrial vehicles
- farm machines
- earth moving vehicles.
Special Purpose Vehicles are not built for on-road use and therefore may not conform to the safety standards set by the Australian Design Rules or the South Australian Road Traffic Act. For this reason there may be conditions set on the use of these vehicles on roads eg
- daylight travel only
- restrictions on speed
- restrictions on distance that may be travelled
- carrying warning signs.
Heavy Special Purpose Vehicles (unladen mass exceeding 4500kg) fall into one of three categories.
- Type P - Plant based
A vehicle built or permanently modified to operate offroad, or on road related areas, or on an area of road that is under construction or repair. Examples include forklifts, backhoes, bulldozers, excavators, front-end loaders, tractors, agricultural machines, graders.
- Type T - Truck based
A vehicle built or permanently modified primarily for use on roads that has no axle or axle group loaded in excess of the statutory mass limits. This category includes vehicles that are constructed on a truck chassis, either by design or modification. Examples include truck mounted mobile cranes and truck mounted drilling rigs.
- Type O - Overmass
A vehicle (other than a type P) built or permanently modified for use on roads that has at least one axle or axle group loaded in excess of the statutory mass limits.