7 Vehicle dynamic performance
7-5 Dynamic performance
Certifier category: HVP2
Reasons for rejection
1. A high productivity vehicle that is not a pro forma vehicle is not certified to the requirements of the Rule.
2. A pro forma vehicle has not been approved as a high productivity vehicle.
3. A high productivity vehicle has been certified by a HVS certifier with the incorrect category.
4. A high productivity vehicle has not been certified using the appropriate methodology (PBS or approved alternative) (Note 1).
5. A vehicle certified as a pro forma high productivity heavy vehicle does not have general access to the road network over 44 tonne.
6. A vehicle certified as a high productivity heavy vehicle but is not a pro forma or PBS vehicle has general access to the road network.
7. A vehicle certified as a high productivity does not have the equivalent safety performance as a standard motor vehicle for the proposed roads to be used under the permit.
8. A vehicle certified as a high productivity vehicle does not meet the applicable axle and axle set requirements and the gross mass limits in parts 3 and 4 of Schedule 3.
9. the towing vehicle in a combination certified as a high productivity vehicle does not have at least two motor driven axles in a tandem or tri axle set when operating above 39 tonne.
10. A semi-trailer certified as a high productivity vehicle that is not in a B-train does not have a tri-axle or quad-axle set with no more than one steering axle when operating above 44 tonne.
11. A semi-trailer certified as a high productivity vehicle that is in a B-train and does not have either a tandem or tri-axle set when operating above 44 tonne when operating above 44 tonne.
12. A full trailer that is certified as part of a high productivity combination does not have either two tandem axle sets or one tandem axle set and one tri-axle set.
13. A vehicle operating as a high-productivity motor vehicle has a gross mass which exceeds the gross vehicle mass, gross combination mass, maximum towed mass, or brake code mass if any of these limits apply to the vehicle.
14. A vehicle certified as a high productivity vehicle has been certified with a gross mass, axle mass, or dimension requirements less than that specified in the permit or the applicable requirements in the Rule.
15. A vehicle being operated as part of a combination vehicle on a 50Max permit does not have sufficient axles to ensure the dedicated combination it operates in has a minimum of 9 axles.
16. A vehicle operating as a high productivity vehicle operates outside the width or height dimension limits and does not have an exemption.
17. A vehicle operating as a high-productivity motor vehicle does not comply with the requirements of the Rule.
For further information:
|Dimension||Distance (metres except where indicated otherwise)|
|Two-wheeled vehicles of classes AA, AB, LA, and LC||1.1|
|All other vehicles||2.55, or 1.275 from each side of the longitudinal centre-line of the vehicle|
Overall length (excluding collapsible mirrors)
Towing vehicle, full trailer, pole trailer (excluding load)
|Rigid vehicle (not towing)||12.6|
Rigid bus with three axles where the rearmost axle is a
(a) either positively and continuously linked to the front steer axle (except may be locked for reverse or high-speed operations), or
(b) automatically locked at a speed of 30km/h in the straight-ahead position or for reverse operations
Towing vehicle and semi-trailer with:
Towing vehicle and full trailer:
|Towing vehicle and simple trailer||22|
Any other combination of vehicles
Forward distance (excluding collapsible mirrors)
|Rigid vehicle||8.5 if fitted with tow coupling; 9.5 otherwise|
|Full trailer, simple trailer, pole trailer with drawbar at full extension, articulated bus (both front and rear sections)||8.5|
|Heavy rigid vehicle whose rearmost axle is a non-steering axle||4.0 or 70% of wheelbase (whichever is less)|
|Heavy rigid vehicle whose rearmost axle is a steering axle||4.25 or 70% of wheelbase (whichever is less)|
|Rigid bus that exceeds 12.6m in overall length||4.5 or 72% of wheelbase (whichever is less)|
|Articulated bus, heavy simple trailer, heavy pole trailer with one axle set||4.0 or 50% of forward distance (whichever is less)|
|Heavy semi-trailer other than a Class TC caravan trailer||4.3 or 50% of forward distance (whichever is less)|
|Heavy full trailer, heavy pole trailer with two axle sets||4.0 or 50% of wheelbase (whichever is less)|
|Class TC caravan trailer that is a semi-trailer||4.0 or 65% of forward distance (whichever is less)|
|All other vehicles||4.0|
Minimum ground clearance4
|Heavy motor vehicle||The greater of 100mm or 6% of the distance from the nearest axle to the point where the ground clearance is measured (except when vehicle is loading or unloading)|
|Light motor vehicle||No requirement|
2.04 radius arc ahead of kingpin centre
|Simple trailer||2.04 radius arc ahead of tow coupling centre|
|Full trailer||2.04 radius arc ahead of turntable centre|
|Pole trailer||2.04 radius arc ahead of turntable centre on towing vehicle|
|Agricultural motor vehicle||4.0|
|All other vehicles||3.0|
Rear trailing unit distance
|A-train, B-train, towing vehicle and two trailers||14.5|
|Articulated vehicle point of attachment (excluding articulated buses)||No further rearward than the rearmost axle of the towing vehicle or rearmost axle of the leading trailer, and if the towing vehicle is a rigid vehicle and has more than one axle in its rear set, not more than 300 mm rearward of the rear axis of the towing vehicle|
Tow coupling position5 (for towing heavy trailer)
45% of wheelbase of towing vehicle
At least 700 mm rearward of the rear axis of the towing vehicle and not more than a distance equal to 50% of wheelbase
45% of wheelbase of the leading unit
Coupling point distance6
30% of forward distance of semi-trailer
Inter-vehicle spacing (between any two consecutive vehicles in a combination, except for a laden pole trailer)7
Outside turning circle in either direction for 360-
25.0 diameter (kerb to kerb, excluding collapsible mirrors)
1 Unless otherwise stated, the dimensions in Table 7-5-1 are maximum dimensions.
2 For items not included in determining whether a vehicle complies with width restriction, see section 3.4 (Land Transport Rule: Vehicle Dimensions and Mass 2016).
3 For items not included in determining whether a vehicle complies with height restrictions, see section 3.6 (Land Transport Rule: Vehicle Dimensions and Mass 2016).
4 Ground clearance for a heavy motor vehicle does not include flexible mudflaps, wheels, tyres or devices designed to discharge static electricity.
5 The tow coupling position is the distance rearward from the motor vehicle's rear axis to the centre of the tow coupling.
6 The coupling point distance (for an A-train) is the distance between the rear axis of the semi-trailer and the tow coupling centre of the full trailer.
7 For other requirements relating to the inter-vehicle spacing between a towing vehicle and a full trailer, see section 3.14(1) (Land Transport Rule: Vehicle Dimensions and Mass 2016).
8 Includes all attachments to vehicles except collapsible mirrors. For requirements relating to turning circle, see section 3.7(1) and 3.7(2) (Land Transport Rule: Vehicle Dimensions and Mass 2016).
Summary of legislation
High productivity vehicles (PBS or Pro-forma) may only be certified by a certifier with this category or by application to the Transport Agency. The Transport Agency reserves the right to set conditions.
Page amended 1 February 2017 (see amendment details).
- 1 Vehicle Identification
- 2 External projections
- 3 Dimensions
- 4 Structure
- 5 Brakes
- 6 Occupant features
- 7 Vehicle dynamic performance
- 8 Equipment fitting
- 9 Towing connections
- 10 Load retention
- 11 Local manufacturing
- 12 Additional topics
- Technical bulletins