National Class 2 Operator’s Guide

JUNE 2020 National Class 2 Operator’s Guide – 2020 Operator’s Train 2 Road Class National

1 Contents

Introduction 3 Eligible road 3 4 Commodity transport in South 4 Vehicle carriers 4 Mass requirements 4 Axle groups and mass limits 4 Axle mass spacing limits 4 Local mass requirements 5 Dimension requirements 6 Warning signs 6 Braking requirements 6 Mechanical couplings and ratings 6 Approved routes 7 Speed limits 9 Conditions applying to road trains in individual states 9 NHVAS accreditation 9 Requirement to carry the Notice or Operator’s Guide 9 Appendix 1: Axle spacing mass limits 10 Appendix 2: Definitions 11

Further information For further information about the National Class 2 Road Train Operator’s Guide please contact: National Heavy Vehicle Regulator E: [email protected] P: 1300 MYNHVR (1300 696 487) www.nhvr.gov.au National Class 2 Road Train Operator’s Guide – 2020 Operator’s Train 2 Road Class National

2 Introduction Type 2 combinations (up to 53.5m long) States where operation is permitted: NSW QLD SA VIC The National Class 2 Road Train Operator’s Guide outlines the requirements for operating a road train under the National Class     2 Road Train Authorisation (Notice) 2020 (the Notice) in the Allowable Type 2 combinations: Length limit (m) participating states of , , South A-triple 53.5 Australia and Victoria. The Notice commences on 4 June 2020. AB-triple 44.0 Eligible road trains

BAB-quad 53.5

ABB-quad 53.5

Rigid two trailers 47.5

A separate and additional road network for AB-triples up to 42.0m long Figure 1: An example of a road train (AB-triple) exists in only. Road train combination types eligible to operate under the Notice The eligibility of Type 1 road train combinations varies between states are shown in Table 1. Operators of road trains that cannot operate (e.g. Table 1 shows that A-doubles have access in all participating under the Notice must apply for an access permit. states, while B-triples and AB-triples only have access in New South Wales, Queensland and South Australia. Table 1: Eligible road train combinations under the Notice Type 2 road trains are granted access as a group. Table 1 shows the Type 1 combinations (up to 36.5m Length States where operation range of allowable Type 2 combinations with access in New South long) limit is permitted Wales, Queensland and South Australia—but not Victoria. (m) NSW QLD SA VIC Two additional road networks are available in South Australia: A-double1 36.5*     • A-doubles up to 30.0m long • AB-triples up to 42.0m long. For these shorter combinations, these networks are extensions of the B-triple (Modular) 35.0     ones for 36.5m A-doubles and 44.0m AB-triples respectively. To be eligible to operate under the Notice, road trains must fully comply with all requirements of the Heavy Vehicle (Mass, Dimension B-triple 36.5     and Loading) National Regulation.

AB-triple2 36.5    

Rigid truck towing two trailers 36.5    

*A separate and additional road network for A-doubles up to 30.0m long exists in South Australia only.

1 A-doubles are sometimes called double road trains.

2 AB-triples are sometimes called AB-doubles. Guide – 2020 Operator’s Train 2 Road Class National

3 Livestock transport Mass requirements

Road trains may be used to transport livestock. They typically have The default mass limits are the General Mass Limits (GML). two, three or four decks, and a total height of up to 4.6m. Their A summary of mass requirements is available on the NHVR website operation is authorised under the Notice. at www.nhvr.gov.au/road-access/mass-dimension-and-loading. These include mass limits: Livestock-transport-specific mass requirements vary between states and are summarised in Table 2. • specified by the vehicle manufacturer • for individual axles and axle groups Table 2: Mass limits for livestock transport road trains by state and • for individual component vehicles and trailers territory • for the combination as a whole • as determined by axle spacing (Appendix 1). State/territory Livestock transport road train mass limits Road trains may also load to Concessional Mass Limits (CML). The New South Wales Livestock transport mass limits standard requirements for CML apply, including for operators to be Queensland Livestock volumetric loading accredited under the National Heavy Vehicle Accreditation Scheme (NHVAS) Mass Management module. South Australia As per non-livestock Victoria Road train operators may operate under Higher Mass Limits (HML). When loaded under HML, operators may only access approved under both this Notice and for HML. This means that more Volumetric loading is permitted in South Australia and Victoria for restricted access applies when operating at HML than at GML or some combination types, but not road trains. CML. More information is available on the NHVR website at www.nhvr. More information can be found at: gov.au and on state and territory road agency websites. • https://www.nhvr.gov.au/cml for CML Some specific requirements apply to operating livestock transport • https://www.nhvr.gov.au/hml for HML. road trains in New South Wales. In some instances, A-doubles must be fitted with a tri-axle converter . Details are published on Transport for New South Wales’ road train access maps (see the Approved routes section of this guide). Axle groups and mass limits Table 3 shows the maximum mass allowable on an axle or axle Commodity transport in South Australia group. All of the axle group types listed in Table 2 are allowed on road Dedicated road networks for road trains carrying certain trains operating under the Notice, except: commodities are available in South Australia. These networks • tri-axle drive groups – prohibited on any road trains operating provide additional access, beyond that for the same combinations under the Notice carrying goods other than the specified commodities. • quad-axle groups – prohibited on any road trains operating Road trains eligible to operate on the South Australian commodity under the Notice and when on state-controlled roads in networks are: Queensland only.

• A-doubles up to 36.5m long • B-triples up to 36.5m long (including modular B-triples up to 35.0m long) Axle mass spacing limits • rigid towing two trailers up to 36.5m long. In addition to complying with the mass and dimension requirements, Detailed information on local conditions for commodity-carrying road trains must comply with the axle spacing mass limits included road trains in South Australia is available on the South Australian in Appendix 1. RAVNet Online Map system at www.dpti.sa.gov.au/ravnet. Figure 2 shows an example of the axle spacing requirements and mass limits for a 36.5m A-double. Vehicle carriers

Road trains used to carry vehicles may operate under the Notice. Vehicle carrier road trains may be up to 4.6m high if built with more than one deck. National Class 2 Road Train Operator’s Guide – 2020 Operator’s Train 2 Road Class National

4 Axle/s Axle group/ Axle/vehicle Tyre section Mass limit (t) tyres requirements width GML CML HML less than 11.0 11.5 11.0 375mm single tyres on all axles 375- 450mm 13.3 13.8 13.3 at least 14.0 14.5 14.0 450mm Tandem axle group3 single tyres on one axle and n/a 13.0 13.5 14.0 dual tyres on the other axle Figure 2: Measuring axle spacing on a 36.5m A-double dual tyres on all n/a 16.5 17.0 Table 5 specifies road train axle spacing mass limits. The distance axles between axle groups determines the maximum allowable mass over single tyres on those axle groups. all axles single tyres less than 15.0 15.5 15.0 Table 3: Mass limits for single axles and axle groups a combination of single and 375mm Axle/s Axle group/ Axle/vehicle Tyre section Mass limit (t) dual tyres tyres requirements width GML CML HML Tri-axle single tyres on at least 375 default limit n/a 6.0 group all axles mm complying steer a combination single tyres n/a 6.5 axle vehicle of single and at least 375 20.0 21.0 22.54 Steer axle dual tyres mm n/a 295-375 mm 6.5 at least 375 dual tyres on all n/a 7.1 n/a mm axles less than less than 6.0 15.0 375mm single tyres on 375mm all axles at least single tyres 375- 450mm 6.7 Quad-axle 5 375mm Single axle at least 20.0 7.0 dual tyres on all 450mm n/a axles dual tyres n/a 9.0

non load- Local mass requirements sharing n/a 10.0 Twin-steer suspension The mass requirements under the Heavy Vehicle (Mass, Dimension axle group system and Loading) National Regulation and described—GML, CML and

Single tyres load-sharing HML—determine whether a road train is eligible to operate under the suspension n/a 11.0 Notice (at all). system Operators must also comply with local mass requirements. These are as shown on the maps detailing road train access. These local requirements reflect limitations of specific road infrastructure (e.g. a load limit).

3 Tri-axles cannot be used as the drive axle group. 4 HML (22.5t) is unavailable for single-tyred tri-axle groups when operating on roads in Victoria.

5 Quad axles prohibited when operating on state-controlled roads in Queensland. Guide – 2020 Operator’s Train 2 Road Class National

5 Dimension requirements Braking requirements

Road trains must meet the dimension requirements as prescribed Most braking system requirements are made by the Australian in the Heavy Vehicle (Mass, Dimension and Loading) National Design Rule (ADR) to which the vehicle was constructed. A road train Regulation. These are mostly the same requirements as those that must continue to comply with those requirements. apply to non-road trains, including a width limit of 2.5m and a The Heavy Vehicle (Vehicle Standards) National Regulation makes default height limit of 4.3m (or 4.6m for livestock and car carrying some additional requirements that apply to road train combinations. vehicles, and B-triples meeting certain conditions6). These include ensuring there is sufficient air pressure available in the There are some dimension requirements specific to road trains under braking system. the Notice, particularly the length limits for each eligible road train The following additional braking requirements apply in New South combination type as shown in Table 1. Wales:

• The prime mover of a B-triple or AB-triple must be fitted with an Warning signs anti-lock braking system (ABS) complying with third edition ADR 64. Road trains longer than 22m, but not longer than 30m, must display • A tank forming part of any heavy vehicle combination and a long vehicle warning sign at their rear (as shown in Figure 3). used to transport specified dangerous goods must be fitted with an electronic roll-over control system. These requirements apply to heavy vehicles, irrespective of when they were built. The ADRs have also mandated:

• anti-lock braking systems to be fitted on prime movers built from 1 January 2015 • vehicle stability control to be fitted on prime movers built from 1 July 2020 • rollover control systems to be fitted on heavy trailers built from 1 November 2019. The ADRs requirements apply to heavy vehicles operating in any state or territory of Australia. Figure 3 Example of a long vehicle sign Road trains longer than 30m must display a road train warning sign Mechanical couplings and ratings at the front and rear of the combination (as shown in Figure 4). Mechanical couplings are the devices that connect one component vehicle of a combination to another. They include:

• fifth wheels, king pins and turntables • pin-type couplings and drawbar eyes on converter dolly couplings. Eligible road trains are defined in the Notice partly by the types of mechanical couplings with which they are fitted. A key difference between coupling types is their capacity to resist roll between the connected vehicles.

• Fifth wheel assemblies that utilise two rotating plates are considered to be roll-coupled connections. • Pin-type couplings and drawbar eyes—a feature of converter dollys—are not considered to be roll-coupled. The pin-type Figure 4 Example of a road train sign connection to the towing (forward) vehicle offers lesser resistance to roll. Warning sign requirements are described in the NHVR’s Vehicle Standards Guide (VSG-19): Vehicle Warning Signs at www.nhvr.gov. au/files/201806-0736-vsg19-vehicle-warning-signs.pdf.

National Class 2 Road Train Operator’s Guide – 2020 Operator’s Train 2 Road Class National 6 See NHVR information sheet - 4.6m High Specified Semitrailer Information Sheet atwww.nhvr.gov.au/files/201908-1086-information-sheet-specified-semitrailer.pdf .

6 Table 4: Key road train trailer coupling strength requirements of Approved routes ADR 63/00 Road trains may access the routes authorised under the Notice. Coupling type Relevant Australian Standard Minimum Approved routes are a combination of areas (all roads within a D-value (kN) defined area) and specific roads. These are described on maps Fifth wheel 1773-1990 162 published by each state government. Maps are available as follows. assembly Articulated Vehicles-Fifth Wheel Assemblies New South Wales Fifth wheel 2175-1990 162 www.rms.nsw.gov.au/business-industry/heavy-vehicles/maps/ kingpins Articulated Vehicles - Kingpins restricted-access-vehicles-map/index.html#InteractiveRoadTrainmap Pin-type 2213-1984 186 couplings and 50mm Pin-Type Couplings and Drawbar Queensland drawbar eyes Eyes for Trailers qldglobe.information.qld.gov.au/?topic=heavy-vehicle-routes-and- restrictions All road train trailers built from July 1991 onwards must comply with The below excerpt from the Queensland Globe (Figure 5) shows Australian Design Rule 63/00 – Trailers Designed for Use in Road approved heavy vehicle routes in Queensland. When accessing Trains. ADR 63 requires that they be equipped with mechanical the map in Queensland Globe, the legend can be expanded by couplings meeting the standards and strength requirements shown clicking on the arrow that appears on the right-hand side of the in Table 4. screen. For road train trailers built before July 1991 and not subject to ADR • Blue roads (designated ‘RT1 route’) show roads approved for 63/00, requirements made in the Heavy Vehicle (Vehicle Standards) access by Type 1 road trains. National Regulation apply. Those include complying with the • Pink roads (designated ‘RT2 route’) show roads approved for following Australasian Standards and updated/later versions of access by both Type 1 and Type 2 road trains. these:

• AS 2175-1990: Articulated Vehicles – Kingpins • AS 2213-1984: 50mm Pin-Type Couplings and Drawbar Eyes for Trailers • AS/NZS 4968.1:2003: Heavy road vehicles –Mechanical coupling between combinations. These Australasian Standards describe a method to, and require operators to, calculate coupling strength requirements (minimum D-values). Example calculations are shown in Table 5. Alternatively, values no less than those required by ADR 63/00 and shown in Table 4 are acceptable.

Table 5: Examples of minimum coupling strength values calculated via the Australian Standards

Combination type Dolly converter Minimum D-value (kN) Rigid truck towing two Tandem axle 124 trailers A-double Tandem axle 128 Tandem axle 161 A-triple Tri-axle 172 Figure 5 Excerpt from the Queensland Globe showing approved road train routes. The Queensland Globe shows restrictions on road train routes. These are visible by zooming in on sections of approved routes on which restrictions apply. A restriction example is shown in Figure 6. It is signified by the blue dot at the road . Information on the restriction is viewed by clicking on the:

• blue/white spanner icon • identify icon that appears on the toolbar • route restriction, where displayed on the map National Class 2 Road Train Operator’s Guide – 2020 Operator’s Train 2 Road Class National

7 • restriction menu item from the panel that appears on the left of Victoria screen The Victorian road train network is available on the VicRoads • restriction item(s) that appear on the menu panel for information webpage. Figure 7 shows an excerpt of the road train map for on the restriction’s nature. Victoria. Operators can click on:

• the menu icon (shown as the middle icon at the top right of Figure 7) for a map legend • an approved road for information on that road • a restriction (yellow dot) for information on that the restriction. Figure 7 Excerpt of the maps showing approved routes and restrictions in Victoria.

Figure 6 Excerpt from the Queensland Globe showing a restriction Each of the Victorian maps displays: on a Type 1 road train route. • approved routes of operation for eligible road trains South Australia • any conditions and restrictions applicable to a given route All of the routes allow operation of road trains at GML and CML. www.dpti.sa.gov.au/ravnet Operators must still comply with any mass restrictions (e.g. as Select the type of road train routes you are seeking to access from applies on a specific road). the menu on the left of screen, choosing from: HML-approved routes comprise those parts of the default (GML) • GML routes road train network assessed as having sufficient capacity to support • HML routes the additional mass. There was no HML access for road trains • Commodity routes (road train). operating in Victoria at the time of writing. The selected routes are displayed on the screen. Approved roads are represented by black lines. Network restrictions are indicated by red dots with white crosses and green stars for restrictions. Click on the dots and stars to display the restriction. South Australia has provided routes for road trains transporting specific commodity types. The routes provide additional access beyond those available for general road train operation. They are available at GML and CML only. Commodity routes are represented by blue lines. Orange borders designate local government boundaries. Printing the map will produce a list of local government restrictions not visible on the interactive map. National Class 2 Road Train Operator’s Guide – 2020 Operator’s Train 2 Road Class National

8 Speed limits Victoria • Nil. Road trains must be operated in accordance with the speed limits applying on a given road. Additional conditions to those described above apply to road train operation on a road-by-road basis. These are described on the Road trains are restricted to the lesser of an absolute maximum individual roads as displayed on the maps for road train access. speed and the applicable speed limit on a given road. The absolute maximums are summarised in Table 6. Table 6: Summary of road train absolute maximum speed limits NHVAS accreditation

State or territory Maximum speed limit The circumstances in which operators utilising the Notice must be New South Wales 90 km/h accredited under the NHVAS have been reduced. Queensland 90km/h Operators of road trains registered in South Australia have the option to participate in the NHVAS Maintenance Management 100km/h On the: module as an alternative to displaying a valid inspection label. This • Eyre - west of condition reflects requirements of the South Australian Government’s South Australia • , north of Port Augusta Heavy Vehicle Inspection Scheme. 90km/h On any other road in SA Operators seeking to load a road train to CML or HML8 must Victoria 90km/h participate in the NHVAS Mass Management module. This is a standing requirement under the Heavy Vehicle National Law An information sheet on road train speed limits is available on the (HVNL). NHVR website. Road trains must also be limited (i.e. mechanically, electronically or otherwise) to be incapable of exceeding 100km/h. Requirement to carry the Notice or Operator’s Guide

Conditions applying to road trains in Drivers do not need to carry a copy of the Notice or Operator’s individual states Guide.

As much as possible, road train requirements nationally have been made uniform. However, it has been necessary to retain some state- specific conditions. These conditions apply to road trains operating on any and all roads within a given state.

New South Wales • Prime movers forming part of B-triple and AB-triple combinations must be equipped with ABS .

Queensland • Quad-axle groups must not be fitted on any road trains while operating on state-controlled roads in Queensland only.

South Australia • Operators of road trains registered in South Australia must7: − be accredited in the NHVAS Maintenance Management module, or − display a valid inspection label on their road train that was issued by the South Australia Department of Planning, Transport and Infrastructure (DPTI).

7 The requirement does not apply to road trains visiting, but not registered in South Australia.

8 NHVAS Mass Management is only required when a vehicle is being loaded to CML or a tri-axle group to HML. Guide – 2020 Operator’s Train 2 Road Class National

9 Appendix 1: Axle spacing mass limits

The axle spacing mass limits shown in Table 5 are as prescribed in the Heavy Vehicle (Mass, Dimension and Loading) National Regulation. Table 5: Restricted access axle spacing mass limits

Length of axle spacing (m) Length of axle spacing (m) Length of axle spacing (m) Length of axle spacing (m) Length of axle spacing (m) At least Less than Mass limit (t) At least Less than Mass limit (t) At least Less than Mass limit (t) At least Less than Mass limit (t) At least Less than Mass limit (t) 0.0 2.5 15.0 13.5 13.7 53.0 23.7 23.8 83.5 33.8 34.0 114.0 44.0 44.2 144.5 2.5 3.7 23.0 13.7 13.8 53.5 23.8 24.0 84.0 34.0 34.2 114.5 44.2 44.3 145.0 3.7 3.8 23.5 13.8 14.0 54.0 24.0 24.2 84.5 34.2 34.3 115.0 44.3 44.5 145.5 3.8 4.0 24.0 14.0 14.2 54.5 24.2 24.3 85.0 34.3 34.5 115.5 44.5 44.7 146.0 4.0 4.2 24.5 14.2 14.3 55.0 24.3 24.5 85.5 34.5 34.7 116.0 44.7 44.8 146.5 4.2 4.3 25.0 14.3 14.5 55.5 24.5 24.7 86.0 34.7 34.8 116.5 44.8 45.0 147.0 4.3 4.5 25.5 14.5 14.7 56.0 24.7 24.8 86.5 34.8 35.0 117.0 45.0 45.2 147.5 4.5 4.7 26.0 14.7 14.8 56.5 24.8 25.0 87.0 35.0 35.2 117.5 45.2 45.3 148.0 4.7 4.8 26.5 14.8 15.0 57.0 25.0 25.2 87.5 35.2 35.3 118.0 45.3 45.5 148.5 4.8 5.0 27.0 15.0 15.2 57.5 25.2 25.3 88.0 35.3 35.5 118.5 45.5 45.7 149.0 5.0 5.2 27.5 15.2 15.3 58.0 25.3 25.5 88.5 35.5 35.7 119.0 45.7 45.8 149.5 5.2 5.3 28.0 15.3 15.5 58.5 25.5 25.7 89.0 35.7 35.8 119.5 45.8 46.0 150.0 5.3 5.5 28.5 15.5 15.7 59.0 25.7 25.8 89.5 35.8 36.0 120.0 46.0 46.2 150.5 5.5 5.7 29.0 15.7 15.8 59.5 25.8 26.0 90.0 36.0 36.2 120.5 46.2 46.3 151.0 5.7 5.8 29.5 15.8 16.0 60.0 26.0 26.2 90.5 36.2 36.3 121.0 46.3 46.5 151.5 5.8 6.0 30.0 16.0 16.2 60.5 26.2 26.3 91.0 36.3 36.5 121.5 46.5 46.7 152.0 6.0 6.2 30.5 16.2 16.3 61.0 26.3 26.5 91.5 36.5 36.7 122.0 46.7 46.8 152.5 6.2 6.3 31.0 16.3 16.5 61.5 26.5 26.7 92.0 36.7 36.8 122.5 46.8 47.0 153.0 6.3 6.5 31.5 16.5 16.7 62.0 26.7 26.8 92.5 36.8 37.0 123.0 47.0 47.2 153.5 6.5 6.7 32.0 16.7 16.8 62.5 26.8 27.0 93.0 37.0 37.2 123.5 47.2 47.3 154.0 6.7 6.8 32.5 16.8 17.0 63.0 27.0 27.2 93.5 37.2 37.3 124.0 47.3 47.5 154.5 6.8 7.0 33.0 17.0 17.2 63.5 27.2 27.3 94.0 37.3 37.5 124.5 47.5 47.7 155.0 7.0 7.2 33.5 17.2 17.3 64.0 27.3 27.5 94.5 37.5 37.7 125.0 47.7 47.8 155.5 7.2 7.3 34.0 17.3 17.5 64.5 27.5 27.7 95.0 37.7 37.8 125.5 47.8 48.0 156.0 7.3 7.5 34.5 17.5 17.7 65.0 27.7 27.8 95.5 37.8 38.0 126.0 48.0 48.2 156.5 7.5 7.7 35.0 17.7 17.8 65.5 27.8 28.0 96.0 38.0 38.2 126.5 48.2 48.3 157.0 7.7 7.8 35.5 17.8 18.0 66.0 28.0 28.2 96.5 38.2 38.3 127.0 48.3 48.5 157.5 7.8 8.0 36.0 18.0 18.2 66.5 28.2 28.3 97.0 38.3 38.5 127.5 48.5 48.7 158.0 8.0 8.2 36.5 18.2 18.3 67.0 28.3 28.5 97.5 38.5 38.7 128.0 48.7 48.8 158.5 8.2 8.3 37.0 18.3 18.5 67.5 28.5 28.7 98.0 38.7 38.8 128.5 48.8 49.0 159.0 8.3 8.5 37.5 18.5 18.7 68.0 28.7 28.8 98.5 38.8 39.0 129.0 49.0 49.2 159.5 8.5 8.7 38.0 18.7 18.8 68.5 28.8 29.0 99.0 39.0 39.2 129.5 49.2 49.3 160.0 8.7 8.8 38.5 18.8 19.0 69.0 29.0 29.2 99.5 39.2 39.3 130.0 49.3 49.5 160.5 8.8 9.0 39.0 19.0 19.2 69.5 29.2 29.3 100.0 39.3 39.5 130.5 49.5 49.7 161.0 9.0 9.2 39.5 19.2 19.3 70.0 29.3 29.5 100.5 39.5 39.7 131.0 49.7 49.8 161.5 9.2 9.3 40.0 19.3 19.5 70.5 29.5 29.7 101.0 39.7 39.8 131.5 49.8 50.0 162.0 9.3 9.5 40.5 19.5 19.7 71.0 29.7 29.8 101.5 39.8 40.0 132.0 50.0 50.2 162.5 9.5 9.7 41.0 19.7 19.8 71.5 29.8 30.0 102.0 40.0 40.2 132.5 50.2 50.3 163.0 9.7 9.8 41.5 19.8 20.0 72.0 30.0 30.2 102.5 40.2 40.3 133.0 50.3 50.5 163.5 9.8 10.0 42.0 20.0 20.2 72.5 30.2 30.3 103.0 40.3 40.5 133.5 50.5 50.7 164.0 10.0 10.2 42.5 20.2 20.3 73.0 30.3 30.5 103.5 40.5 40.7 134.0 50.7 50.8 164.5 10.2 10.3 43.0 20.3 20.5 73.5 30.5 30.7 104.0 40.7 40.8 134.5 50.8 51.0 165.0 10.3 10.5 43.5 20.5 20.7 74.0 30.7 30.8 104.5 40.8 41.0 135.0 51.0 51.2 165.5 10.5 10.7 44.0 20.7 20.8 74.5 30.8 31.0 105.0 41.0 41.2 135.5 51.2 51.3 166.0 10.7 10.8 44.5 20.8 21.0 75.0 31.0 31.2 105.5 41.2 41.3 136.0 51.3 51.5 166.5 10.8 11.0 45.0 21.0 21.2 75.5 31.2 31.3 106.0 41.3 41.5 136.5 51.5 51.7 167.0 11.0 11.2 45.5 21.2 21.3 76.0 31.3 31.5 106.5 41.5 41.7 137.0 51.7 51.8 167.5 11.2 11.3 46.0 21.3 21.5 76.5 31.5 31.7 107.0 41.7 41.8 137.5 51.8 52.0 168.0 11.3 11.5 46.5 21.5 21.7 77.0 31.7 31.8 107.5 41.8 42.0 138.0 52.0 52.2 168.5 11.5 11.7 47.0 21.7 21.8 77.5 31.8 32.0 108.0 42.0 42.2 138.5 52.2 52.3 169.0 11.7 11.8 47.5 21.8 22.0 78.0 32.0 32.2 108.5 42.2 42.3 139.0 52.3 52.5 169.5 11.8 12.0 48.0 22.0 22.2 78.5 32.2 32.3 109.0 42.3 42.5 139.5 52.5 52.7 170.0 12.0 12.2 48.5 22.2 22.3 79.0 32.3 32.5 109.5 42.5 42.7 140.0 52.7 52.8 170.5 12.2 12.3 49.0 22.3 22.5 79.5 32.5 32.7 110.0 42.7 42.8 140.5 52.8 53.0 171.0 12.3 12.5 49.5 22.5 22.7 80.0 32.7 32.8 110.5 42.8 43.0 141.0 53.0 53.2 171.5 12.5 12.7 50.0 22.7 22.8 80.5 32.8 33.0 111.0 43.0 43.2 141.5 53.2 53.3 172.0 12.7 12.8 50.5 22.8 23.0 81.0 33.0 33.2 111.5 43.2 43.3 142.0 53.3 — 172.5 12.8 13.0 51.0 23.0 23.2 81.5 33.2 33.3 112.0 43.3 43.5 142.5 13.0 13.2 51.5 23.2 23.3 82.0 33.3 33.5 112.5 43.5 43.7 143.0 13.2 13.3 52.0 23.3 23.5 82.5 33.5 33.7 113.0 43.7 43.8 143.5 13.3 13.5 52.5 23.5 23.7 83.0 33.7 33.8 113.5 43.8 44.0 144.0 National Class 2 Road Train Operator’s Guide – 2020 Operator’s Train 2 Road Class National

10 Appendix 2: Definitions Table 7 Other definitions

The road trains authorised to operate under the Notice are defined Combination Definition in Table 6 below. Complying steer A road train with a single steer axle is a complying Table 6 Authorised road train combinations axle vehicle steer axle vehicle, if the vehicle has all of the following: Combination Definition • an engine complying with the emission control requirements contained in ADR 80/01 (Euro IV engine) or a later version of ADR 80 A-double A prime mover towing a semitrailer towing another • a front underrun protection device that complies semitrailer connected by a converter dolly. with UN ECE Regulation No. 93 or ADR 84 – Front Underrun Impact Protection • a cabin that complies with UN ECE Regulation A-triple A prime mover towing three semitrailers. The second and No. 29 third semitrailers are each connected by a converter dolly. • appropriately rated tyres, axle and suspension to permit 6.5 tonnes on the steer axle • a gross vehicle mass (GVM) of 15 tonnes or more. AB-triple A prime mover towing three semitrailers. The second D-value D-value is a measure of a mechanical coupling’s semitrailer is connected by a converter dolly and the third strength capacity. These values are calculated trailer is connected by a fifth wheel located towards the rear using methods described in relevant Australasian of the preceding semitrailer. Can also be described as a Standards. semitrailer towing a B-double using a converter dolly. The Australasian Standards require a D-value to be permanently marked on a mechanical coupling by its manufacturer. Operators must ensure their ABB-quad A prime mover towing four semitrailers. The third and fourth road train’s couplings have a sufficient D-value, as semitrailers are connected by a fifth wheel located towards required by the Heavy Vehicle (Vehicle Standards) the rear of the preceding semitrailer, and the second National Regulation. semitrailer is connected by a converter dolly. Can also be Heavy Vehicle This Regulation is made under the HVNL and described as a semitrailer towing a B-triple using a converter (Vehicle Standards) prescribes the vehicle standards with which a single dolly. National Regulation heavy vehicle or heavy combination must comply for its use on a road.

B-triple B-triple means a combination consisting of a prime mover towing three semitrailers, with— (a) the first semitrailer being attached directly to the prime mover by a fifth wheel coupling; and (b) the second semitrailer being mounted on the rear of the first semitrailer by a fifth wheel coupling on the first semitrailer; and (c) the third semitrailer being mounted on the rear of the second semitrailer by a fifth wheel coupling on the second semitrailer.

B-triple A B-triple that is not longer than 35m consisting of a prime (modular) mover with a single steer axle and a tandem drive axle, towing three tri-axle group semitrailers connected by fifth wheel couplings, where—(a) the combination can form a compliant B-double if any one semitrailer is removed; and (b) the distance from the king pin of the first trailer to the rear of the combination is not longer than 29.6m; and (c) the prime mover is rated by the manufacturer for a startability of 10 per cent and a gradeability of 12 per cent; and (d) the prime mover is capable of maintaining a minimum speed of 70km/h on a one per cent grade at a Gross Combination Mass (GCM) rating of 84.5t; and (e) the prime mover must have an engine with a maximum power output of not less than 370 kW (500 (hp)).

BAB-quad A prime mover towing four semitrailers. The second and fourth semitrailers are connected by a fifth wheel located towards the rear of the preceding semitrailer, and the third semitrailer is connected by a converter dolly. Can also be described as a B-double towing a B-double using a converter dolly. National Class 2 Road Train Operator’s Guide – 2020 Operator’s Train 2 Road Class National

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