National Class 2 B-double Authorisation Notice Operator’s Guide

The National Class 2 B-double Authorisation Notice 2024 (No.1) authorises the use of Class 2 heavy vehicles that are B-doubles, complying with the conditions of the Notice to operate on stated routes and areas in Australian Capital Territory, New South Wales, Queensland, South Australia, Tasmania and Victoria.

Note: This instrument does NOT exempt these vehicles from other requirements of the Heavy Vehicle National Law (HVNL), including mass and other dimension requirements.

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Specifications
Gazette Notice:	C2024G00054
Starts:	1 February 2024
Expires:	31 January 2029
Vehicle types:	Class 2, B-double
Exemptions:	Network access
Law:	HVNL, MDL
Coverage:	ACT, NSW, QLD, SA, TAS, VIC
To be carried:	No

*Specific state conditions are explained below.

Overview

The information in this Operator’s Guide is intended to do two things:

Explain how the National Class 2 B-Double Authorisation Notice 2024 (No.1) (Notice) operates, to assist in complying with it. It is important to remember this Operator’s Guide is instructional only and it is the Notice that provides the exemption or authorisation. If there is a difference or misunderstanding between the Operator’s Guide and the Notice, the Notice has priority and must be followed. The only exceptions are the requirements or conditions set out in the ‘Network and Mapping’ section explained below.
Provide additional information referred to in the network requirements of the Notice. This includes links to network maps and other information such as vehicle, travel and road conditions. Networks and their conditions published in the ‘Network and Mapping’ section of this Operator’s Guide are not general advice and must be treated as conditions of the Notice.

Please read the Notice and this Operator's Guide together. To download or print this guide, use the print or PDF buttons on the top right of this page

About this Notice

This Notice provides access to stated routes and areas (networks) within participating jurisdictions to Class 2 B-double heavy vehicles that meet the conditions of the Notice.

Application

The application of the Notice only applies to the extent to which conditions are granted.

The Notice applies to a B-double that is a Class 2 B-double under s136 of the HVNL that is:

a combination defined in the Notice; and
complies with the conditions of the Notice; and
complies with the conditions of the Schedule of the participating jurisdiction in which it is operating.

A vehicle to which this section applies is an eligible B-double.

Authorisation - stated areas or routes

An eligible vehicle accessing a stated map under a Schedule of the Notice must comply with conditions specified for that map in:

the body of this Notice; and
the Schedule in which the stated area or route is prescribed; and
the Network and Mapping section of this Operator's Guide; and
on the map or stated area or route itself.

Note: Other mass and dimension limits in the MDL apply.

Definitions

The following are terms used in this Notice or conditions of operation. Unless otherwise stated, words and expressions used in this Notice have the same meaning as defined in the HVNL.

Term	Definition
ADR	Means the Australian Design Rules.
B-double	A combination consisting of a prime mover towing two semitrailers, with the first semitrailer being attached directly to the prime mover by a fifth wheel coupling and the second semitrailer being mounted on the rear of the first semitrailer by a fifth wheel coupling on the first semitrailer.
Complying steer axle vehicle	A heavy vehicle with a single steer axle if the vehicle has all of the following: an engine complying with the emission control requirements contained in ADR 80/01 or a later version of ADR 80. if a version of ADR 80 later than ADR 80/01 applied to the vehicle at the vehicle’s date of manufacture—the version of ADR 80 that applied to the vehicle at the vehicle’s date of manufacture or a later version of ADR 80. a front underrun protection device that complies with UN ECE Regulation No. 93 or ADR 84 – Front Underrun Impact Protection. a cabin that complies with UN ECE Regulation No. 29. 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.
General access	Means access to all roads, subject to the operation of the road rules of the relevant participating jurisdiction
Participating jurisdictions	Australian Capital Territory, New South Wales, Queensland, South Australia, Tasmania and Victoria.
Prescribed dimension requirement	A dimension requirement prescribed by the MDL.
Prescribed mass requirement	A mass requirement prescribed by the MDL.
Tri-axle drive group	A driving axle group of at least 3 axles, in which the horizontal distance between the centre-lines of the outermost axles is more than 2m but not more than 3.2m.

Eligible vehicles

The Notice applies to a Class 2 B-double combination consisting of a prime mover towing two semitrailers, with the first semitrailer being attached directly to the prime mover by a fifth wheel coupling and the second semitrailer being mounted on the rear of the first semitrailer by a fifth wheel coupling on the first semitrailer.

The following vehicles shown in Table 1 are eligible to operate under the Notice.

Note: Table 1 is for illustration purposes, axle groups shown in the image may vary, depending on the combination's axle configuration. The eligible B-double combination must comply with the MDL, the Heavy Vehicle (Vehicle Standards) National Regulation (VS Regulation) and any condition under the Notice.

**Table 1:** Eligible vehicle combinations
Description and images of eligible vehicles
Single drive axle and single trailer axles
Dual drive axle and dual trailer axles
Dual drive axle and tri-axle trailers

Conditions

Notices are subject to various conditions to ensure public safety, protect assets and prevent adverse impacts on the community, such as noise, emissions and traffic congestion. See the sections below for specific conditions related to this Notice.

See the sections below for specific conditions related to this Notice.

Dimension conditions - Click to expand

Unless a specific state or territory condition is more restrictive, the following dimension limits apply nationally to an eligible combination.

Dimension requirements

Table 2 below outlines the maximum dimension requirements for a B-double. Please note that the length of a B-double is dependent on whether it operates at general or restricted access.

**Table 2:** Dimension requirements
Dimension	Limit (m)
Length	Up to 26m
Height	4.6m prescribed semitrailer combination 4.3m all other combinations
Width	2.5m

General access vehicle length limits

The maximum length of a B-Double operating under general access must comply with the maximum length limits in Table 4.

**Table 3:** General access vehicle length limits
Jurisdiction	Maximum length
Tasmania	21.3m for a B-double that has a rear load restraining guard that complies with the Forest Safety Code (Tasmania). 21m for all other B-double combinations
All other jurisdictions	19m

Note: A general access B-double must also comply with the mass limits of the Notice, including but not limited to the axle spacing mass limits for the general access (up to 50.0t) section of this Operator's Guide.

Trailer length limits

The Notice does not provide an exemption for trailer length. All trailers must comply with the same prescribed trailer dimension limits that apply to the compliant combinations (e.g. the semitrailer length limits in the MDL shown in Figure 1).

Road train Notice - Example of a complaint semitrailer — Figure 1: Example of a compliant semitrailer

Dimension requirement for a 26m B-double combination

A B-double may be up to 26 metres long if it meets the following requirements:

The distance from the front articulation point (Figure 2) of the most forward semitrailer to the rear of the B-double is not more than 20.6 metres.
The prime mover in the B-double combination which is a complying steer axle vehicle:
- is fitted with a front underrun protective device complying with Regulation No. 93 made under the UNECE Agreement or ADR 84 – Front Underrun Impact Protection,
- for a prime mover manufactured after 31 December 2005 — is fitted with a cab complying with Regulation No. 29 made under the UNECE Agreement,
- other than for a deck permitted under subsection (3A), does not have an area carrying, or built to carry, goods.

Dimension requirements 26m B Double — Figure 2: Dimension requirements for a 26 metre B-double

Dimension requirements for Tri-tri B-doubles

A tri-tri B-double is a B-double with tri-axle groups on both trailers. Tri-tri B-doubles must conform to the X-Y rule in the MDL.

Tri-tri B-doubles with a total gross combination mass exceeding 52.5 tonnes must conform to the X-Y rule.

The X-Y rule means if distance X is greater than distance Y, the difference between these distances must not be more than 1m. If distance Y is greater than distance X, the difference between these distances must not be more than 1.3m (MDL Schedule 6, Part 2, section 10) (see Figure 3).

X - Y ≤ 1.0 or Y - X ≤ 1.3

X Y Rule diagram — Figure 3: Example of X – Y rule illustration

Mass conditions - Click to expand

Mass requirements

Unless a specific state or territory condition is more restrictive, the following mass limits apply nationally to an eligible combination.

General Mass Limits (GML)

The default mass limit provided by the Notice is GML.

GML applies to all heavy vehicles and is the stated allowable mass for a heavy vehicle axle group, unless the vehicle is operating under an accreditation or an exemption under the HVNL.

GML requirements apply to the following:

mass limits specified by the vehicle manufacturer
mass limits on individual axles and axle groups (see Table 4)
mass limits on individual components (vehicles and trailers)
mass limits on the combination, including as determined by axle spacing requirements.

These mass requirements are prescribed in Schedule 1 of the MDL.

More information on mass limits is available on the NHVR website under Mass, dimensions and loading.

Concessional Mass Limits (CML)

B-doubles may also load to CML.

Operators wishing to benefit from the productivity gains of CML are required to become an NHVAS member, meet the 8 standards of compliance in the NHVAS Accreditation module - Mass Management and nominate vehicles to participate in the scheme.

CML authorises an increase in mass to a nominated heavy vehicle by a maximum of 5% above the GML, subject to:

a maximum of 1t for a vehicle or combination with an allowable gross mass not exceeding 55t
a maximum of 2t for vehicle combinations with an allowable gross mass exceeding 55t.

To be eligible to operate at CML, the axle group must be eligible for the GML shown in Table 4.

For more information, see Concessional Mass Limits.

Axle groups and mass limits

The maximum mass allowable axle or axle group mass limit under the Notice is summarised in Table 4. To be eligible to operate at Concessional Mass Limits (CML), the axle group must be eligible for the GML shown in Table 4.

The maximum mass on each axle group will depend on whether the vehicle operates at general or restricted access, the axle and axle group mass limits in Table 4, and the relevant axle spacing mass limits table.

**Table 4:** Mass limits for single axles and axle groups at GML and CML
Axle group/tyres	Axle	Axle/vehicle requirements	Tyre section width	Mass limit (t) GML	Mass limit (t) CML
Steer axle		Default limit	N/A	6.0
Steer axle		Complying steer axle	Suitability rated	6.5
Single axle		Single tyres	Less than 375mm	6.0
			375–450mm	6.7
			At least 450mm	7.0
		Dual tyres	N/A	9.0
Twinsteer axle group Single tyres		Non-load-sharing suspension system	N/A	10.0
Twinsteer axle group Single tyres		Load-sharing suspension system	N/A	11.0
Tandem axle group		Single tyres on all axles	Less than 375mm	11.0	11.5
			375–450mm	13.3	13.8
			at least 450mm	14.0	14.5
		Single tyres on one axle and dual tyres on the other axle	N/A	13.0	13.5
		Dual tyres on all axles - fitted on a B-double	N/A	16.5	17.0
Tri-axle group		Single tyres on all axles	Single tyres less than 375mm	15.0	15.5
		Single tyres on all axles	At least 375 mm	20.0	21.0
		Combination of single and dual tyres	Single tyres less than 375mm	20.0	21.0
		Combination of single and dual tyres	Single tyres at least 375 mm	20.0	21.0
		Dual tyres on all axles	N/A	20.0	21.0
Quad-axle*		Single tyres on all axles	Less than 375mm	15.0
		Single tyres on all axles	At least 375mm	20.0
		Dual tyres on all axles	N/A	20.0
	*Quad axle groups are prohibited when operating on state-controlled roads in Queensland.

Restricted axles

The following axle groups are restricted in the Notice:

Tri-axle drive groups – An eligible vehicle must not have a drive axle group with more than two axles in contact with the ground. Operators with a tri-drive prime mover in their B-double combination, require an axle group with a retractable axle with one axle raised or a permit to operate.
Quad-axle groups - Prohibited on any B-double operating when on state-controlled roads in Queensland only.

Axle mass spacing limits for general access (up to 50.0t)

B-doubles operating under general access conditions (Section 8 of the Notice) must comply with the axle spacing mass limits specified in Table 5.

The spacing between axle groups determines the maximum allowable mass over those axle groups.
An example of a general access B-double at 50 tonnes, 19 metres, with axle spacing requirements and mass limits is shown in Figure 4.
Figure 4 shows the sum of two adjacent axle groups (14.4t + 15.0t or 15.0t + 14.5t) is 29.5 tonnes and the distance between the outer most axles of those groups must be a minimum of 5.7 metres in accordance with Table 5. The same check applies to all axle groups (i.e. for a B-double with four axle groups, there are six checks which all must comply with Table 5).
The spacing between axle groups determines the maximum allowable mass over those axle groups.

An example of a general access B-double at 50 tonnes, 19 metres, with axle spacing requirements and mass limits — Figure 4: Example of a 19m general access B-double

**Table 5:** Axle spacing limits for general access (up to 50.0t)
Length of axle spacing (m)		Mass limit (t)
At least	Less than	Mass limit (t)
3.50	3.70	23.00
3.70	3.80	23.50
3.80	4.00	24.00
4.00	4.20	24.50
4.20	4.30	25.00
4.30	4.50	25.50
4.50	4.70	26.00
4.70	4.80	26.50
4.80	5.00	27.00
5.00	5.20	27.50
5.20	5.30	28.00
5.30	5.50	28.50
5.50	5.70	29.00
5.70	5.80	29.50
5.80	6.00	30.00
6.00	6.20	30.50
6.20	6.30	31.00
6.30	6.50	31.50
6.50	6.70	32.00
6.70	6.80	32.50
6.80	7.00	33.00
7.00	7.20	33.50
7.20	7.30	34.00
7.30	7.50	34.50
7.50	7.70	35.00
7.70	7.80	35.50
7.80	8.00	36.00
8.00	8.20	36.50
8.20	8.30	37.00
8.30	8.50	37.50
8.50	8.70	38.00
8.70	8.80	38.50
8.80	9.00	39.00
9.00	9.20	39.50
9.20	9.30	40.00
9.30	9.50	40.50
9.50	9.70	41.00
9.70	9.80	41.50
9.80	10.00	42.00
10.00	10.50	42.50
10.50	11.00	43.00
11.00	11.50	43.50
11.50	12.00	44.00
12.00	12.50	44.50
12.50	13.00	45.00
13.00	13.50	45.50
13.50	14.00	46.00
14.00	14.50	46.50
14.50	15.00	47.00
15.00	15.50	47.50
15.50	16.00	48.00
16.00	16.50	48.50
16.50	17.00	49.00
17.00	17.50	49.50
17.50	--	50.00
Note: The axle spacing mass limit does not include the 0.5t for a complying steer axle vehicle. When determining the minimum axle spacing, 0.5t may be added to the mass limit prescribed in this Table, if the steer axle is part of the axle group being considered.

Axle spacing mass limits for combinations above 50.0t

A B-double that exceeds 50t is considered a Restricted Access Vehicle (RAV), and these vehicles are provided additional axle spacing mass limits in the MDL shown in Table 6.

The spacing between axle groups determines the maximum allowable mass over those axle groups. B-doubles that exceed the general access mass limit are classified as a restricted access B-double. These vehicles can operate up to 55.5 tonnes under GML (56.0 tonnes with a complying steer axle).

Figure 5 shows an example of the axle spacing requirements and mass limits for a 19 metre restricted access B-double (over 50 tonnes).

An example of a restricted access B-double at higher masses than 50 tonnes, 19 metres, with axle spacing requirements and mass limits — Figure 5:Example of a 19m RAV B-double

**Table 6:** Restricted access axle spacing mass limits
Length of axle spacing (m)		Mass limit (t)
At least	Less than	Mass limit (t)
0.00	2.50	15.00
2.50	3.70	23.00
3.70	3.80	23.50
3.80	4.00	24.00
4.00	4.20	24.50
4.20	4.30	25.00
4.30	4.50	25.50
4.50	4.70	26.00
4.70	4.80	26.50
4.80	5.00	27.00
5.00	5.20	27.50
5.20	5.30	28.00
5.30	5.50	28.50
5.50	5.70	29.00
5.70	5.80	29.50
5.80	6.00	30.00
6.00	6.20	30.50
6.20	6.30	31.00
6.30	6.50	31.50
6.50	6.70	32.00
6.70	6.80	32.50
6.80	7.00	33.00
7.00	7.20	33.50
7.20	7.30	34.00
7.30	7.50	34.50
7.50	7.70	35.00
7.70	7.80	35.50
7.80	8.00	36.00
8.00	8.20	36.50
8.20	8.30	37.00
8.30	8.50	37.50
8.50	8.70	38.00
8.70	8.80	38.50
8.80	9.00	39.00
9.00	9.20	39.50
9.20	9.30	40.00
9.30	9.50	40.50
9.50	9.70	41.00
9.70	9.80	41.50
9.80	10.00	42.00
10.00	10.20	42.50
10.20	10.30	43.00
10.30	10.50	43.50
10.50	10.70	44.00
10.70	10.80	44.50
10.80	11.00	45.00
11.00	11.20	45.50
11.20	11.30	46.00
11.30	11.70	46.50
11.70	12.00	47.00
12.00	12.30	47.50
12.30	12.70	48.00
12.70	13.00	48.50
13.00	13.30	49.00
13.30	13.70	49.50
13.70	14.00	50.00
14.00	14.30	50.50
14.30	14.70	51.00
14.70	15.00	51.50
15.00	15.30	52.00
15.30	15.70	52.50
15.70	16.00	53.00
16.00	16.30	53.50
16.30	16.70	54.00
16.70	17.00	54.50
17.00	17.30	55.00
17.30	17.70	55.50
17.70	18.00	56.00
18.00	18.30	56.50
18.30	18.70	57.00
18.70	19.00	57.50
19.00	19.30	58.00
19.30	19.70	58.50
19.70	20.00	59.00
20.00	20.30	59.50
20.30	20.70	60.00
20.70	21.00	60.50
21.00	--	62.50

B-double 26m

Figure 6 below shows an example of the axle spacing requirements and mass limits for a 26 metre B-double. A B-double vehicle can operate up to 62.5 tonnes under GML (63.0 tonnes with a complying steer axle).

An example of a restricted access B-double at 62.5 tonnes, 26 metres, with axle spacing requirements and mass limits — Figure 6: Example of a 26m B-double

Other conditions and additional information

Warning signs for long vehicles

Unless otherwise exempted by the Notice or this Operator's Guide, operators must ensure their vehicle or combination complies with ADRs, HVNL, MDL and VS Regulation.

A B-double longer than 22m must display a "long vehicle" warning sign at the vehicle's rear (as shown in Figure 7).

Warning sign requirements are described in the NHVR's Vehicle Standards Guide (VSG-19).

Example of a long vehicle sign — *Figure 7: Example of a road train sign*

Assessing routes

Before an eligible vehicle is driven along any route, its driver and operator must be satisfied that the route has been assessed and that the vehicle can be driven along it without:

disrupting telecommunication, electricity, rail, gas, water or sewage services; or
damaging a road (including a bridge), structure, rail crossing or tree.

Third party approvals

A third party is an entity with which consultation is required by either State or Commonwealth law, as a condition of operation or access.

Operators must secure all approvals from third parties such as electricity/utility companies, rail authorities and other third parties as part of their heavy vehicle operations.

For more information, visit the Third party approvals page.

Complying with the HVNL

Unless otherwise exempted by the Notice or this Operator's Guide, operators must ensure their vehicle or combination complies with the:

Australian Design Rules (ADRs); and,
Heavy Vehicle National Law (HVNL); and,
Heavy Vehicle (Mass, Dimension and Loading) National Regulation (MDL); and,
Heavy Vehicle (Vehicle Standards) National Regulation (VS Regulation).

Using or permitting another person to use a defective heavy vehicle or a heavy vehicle with unapproved modifications on a road may be an offence.

Failure to comply may result in the driver and/or operator being liable for an offence. Penalties can include infringement notices or prosecution.

Loading requirements

To meet the loading requirements, the heavy vehicle must be loaded:

in a way that load placement does not make the heavy vehicle unsafe or unstable
in a way that the load is not likely to fall or be dislodged from the vehicle
using an appropriate system to restrain the load.

Visit the NHVR loading page for more information on load requirements.

Chain of Responsibility (CoR)

Under the HVNL, every party in the Chain of Responsibility (CoR) has a positive duty to ensure the safety of their activities in relation to a heavy vehicle. This duty, known as the “primary duty”, applies to the scheduling, loading and consigning of a vehicle, as well as to its operation on a road.

Safety is broader than the safety of drivers and other road users. It also includes protection of road infrastructure, preventing damage to other vehicles or property, and minimising environmental harm. Substantial penalties may be imposed upon parties who breach this obligation and upon their executives.

For more information on your CoR obligations visit Chain of Responsibility on the NHVR website.

Our Regulatory Advice offers guidance, tips and tools for managing a range of heavy vehicle safety risks.

The requirement to carry the Notice

Drivers do not need to carry a copy of the Notice.

Network and mapping

For the purposes of s142 of the HVNL, an area or route specified in the 'Network & Mapping' section of this Operator's Guide is a stated area or route to which this Notice applies. In addition to complying with the conditions stated in this Operator's Guide, operators must ensure compliance with the specific road manager access requirements set out below or in network maps.

In this tab, you will find the approved routes authorised under the Notice. There may also be network conditions pursuant to the stated areas and routes under the Notice. Network conditions relate to road and travel conditions that are not contained within the Notice.

National Network Map

Certain authorised heavy vehicle road network maps for the Australian Capital Territory, New South Wales, Queensland, South Australia, and Victoria are published by the National Heavy Vehicle Regulator, through the NHVR National Network Map. Additional information and guidance can be found on the National Network Map webpage.

Tasmania network mapping

The Department of State Growth (DSG) is responsible for publishing and maintaining authorised heavy vehicle road network maps in Tasmania.

Visit Heavy vehicle access to view an authorised network.

Approved routes covered by the Notice

The following routes are approved for travel for vehicles eligible under the Notice and are available on the NHVR National Network Map.

Approved routes covered by the Notice - Click to expand

Authorisation - stated areas or routes

An eligible vehicle accessing a stated map under a Schedule of the Notice must comply with conditions specified for that map in:

the body of this Notice; and
the Schedule in which the stated area or route is prescribed; and
the Network and Mapping section of this Operator's Guide; and
on the map or stated area or route itself.

An eligible B-double may operate on an approved network or area shown in Table 7 subject to complying with the conditions of the Notice.

**Table 7:** Approved state and territory routes
	ACT	NSW	QLD	SA	TAS	VIC
Up to 19m B-double operating at a maximum of 50t	General access	New South Wales GML & CML 19m B-double Routes (over 50 tonnes)	General access	General access	In Tasmania General access is provided up to 21m.	General access
Up to 23m B-double	Australian Capital Territory B-double Network	New South Wales GML & CML 23m B-double Routes	Queensland B23 route (B-Double 23m network) Queensland B25/26 route (B-Double 25m/26m network) and B Double 25/26 metre (PBS Level 2A) Queensland RT1 route (Road Train Type 1 network) and Type 1 Road Train and PBS 3A Route Queensland RT2 route (Road Train Type 2 network) and Type 2 Road Train and PBS 4A Route	South Australia 23m B Double (GML) South Australia Commodity Routes – All B Double (GML) Routes	Tasmanian 23m B-double Network	Victoria's Gazetted B-Double Network
Up to 26m B-double	Australian Capital Territory B-double Network	New South Wales GML & CML 25/26m B-double Routes	Queensland B25/26 route (B-Double 25m/26m network) and B Double 25/26 metre (PBS Level 2A) Queensland RT1 route (Road Train Type 1 network) and Type 1 Road Train and PBS 3A Route Queensland RT2 route (Road Train Type 2 network) and Type 2 Road Train and PBS 4A Route	South Australia 26m B Double (GML) South Australia Commodity Routes – All B Double (GML) Routes	Tasmanian 26m B-double Network	Victoria's Gazetted B-Double Network

Specified road manager network requirements

The following section outlines specific road manager network requirements under the Notice, including route conditions, restrictions, and non-participating road managers.

Road manager network requirements in this section may change from time to time and should be reviewed regularly to ensure compliance.

For further information on how to comply with a requirement, please contact the relevant road manager.

Road managers may publish specific route conditions and restrictions on the approved network map. These must be complied with in addition to any route requirements outlined in this Operator's Guide. If a condition listed in any section of this Operator's Guide conflicts with a route condition or restriction published on an approved network map, the more restrictive requirement applies.

South Australia network conditions - Click to expand

Three network access conditions may apply to eligible B-doubles on the South Australian network:

commodity freight network (Table 8); and
South Australia road manager conditions (Table 9); and
restricted structures (Table 10).

Commodity freight networks

The commodity freight networks shown in Table 8 list council-wide road, vehicle and travel conditions.

Dedicated road networks for eligible vehicles carrying certain commodities are available in South Australia. These networks provide additional access, beyond that for the same combinations, when carrying goods of a specified commodity.

Detailed information on local conditions for commodity-carrying eligible vehicles in South Australia is available in Table 8 below.

**Table 8:** Local South Australian commodity freight network conditions
Council name	Restriction information
District Council of Ceduna	Restricted speed loaded or unloaded to 80km/h on sealed council-maintained roads outside town limits. Restricted speed loaded or unloaded to 70km/h on unsealed council-maintained roads outside town limits. Restricted speed loaded or unloaded to 40km/h on all council-maintained roads within town limits. Restricted Access Vehicle (RAV) operators are required to inspect all unsealed routes which have received greater than 15mm of rain in the preceding 24 hours to ensure that the pavement will not be damaged by the RAV operation.
District Council of Cleve	All council gazetted roads have a 70km/h speed restriction.
District Council of Elliston	Speed limits to be a maximum of 60km/h on all commodity routes. Hauling vehicles to be fitted with yellow revolving flashing lights that can be seen through 360 degrees by oncoming or approaching traffic. Driver to stop and give way to other road users where they would normally have priority to allow the other vehicle to clear the intersection prior to the RAV undertaking a turning manoeuvre. No access to commodity routes where there has been greater than 30mm of rain in any 24 hour period.
District Council of Franklin Harbour	Restricted speed loaded or unloaded to 80km/h on sealed council roads outside town limits. Restricted speed loaded or unloaded to 70km/h on unsealed council roads outside town limits. Restricted speed loaded or unloaded to 40km/h on all council-maintained roads within town limits. Restricted Access Vehicle (RAV) operators are required to inspect all unsealed routes which have received greater than 15mm of rain in the preceding 24 hours to ensure that restriction information the pavement will not be damaged by the RAV operation.
District Council of Kimba	Restricted speed loaded or unloaded to 80km/h on sealed council roads outside town limits. Restricted speed loaded or unloaded to 70km/h on unsealed council roads outside town limits. Restricted speed loaded or unloaded to 40km/h on council-maintained roads within town limits. Council has the right to close any district roads if they are deemed to be unsafe or incurring unreasonable damage.
District Council of Lower Eyre Peninsula	Restricted speed loaded or unloaded to 80km/h on sealed council roads outside town limits. Restricted speed loaded or unloaded to 70km/h on unsealed council roads outside town limits. Restricted speed loaded or unloaded to 40km/h on all council-maintained roads within town limits. No access to unsealed routes which have received greater than 15mm of rain in the preceding 24 hours.
District Council of Mount Remarkable	Maximum permitted speed of 60km/h on all unsealed council roads. Maximum permitted speed of 25km/h if the unsealed road is signposted for flood ways or narrowing. On unsealed roads, travel is suspended during periods of prolonged rain and up to 1 day for every 5mm of rain within the 24 hour period after the rainfall event. Access may be further restricted or deferred in the event of a significant rainfall event. Contact must be made with the relevant traffic management information sources on such an occasion.
District Council of Tumby Bay	Restricted speed loaded or unloaded to 80km/h on all sealed council roads outside town limits. Restricted speed loaded or unloaded to 70km/h on all unsealed council roads outside town limits. Restricted speed loaded or unloaded to 40km/h on all council-maintained roads within town limits. Restricted Access Vehicle (RAV) operators are required to inspect all unsealed routes which have received greater than 15mm of rain in the preceding 24 hours to ensure that the pavement will not be damaged by the RAV operation.
District Council Streaky Bay	Restricted speed to 80km/h on sealed council roads outside town limits. Restricted speed loaded or unloaded to 70km/h on unsealed council roads outside town limits. Restricted speed loaded or unloaded to 40km/h on all council-maintained roads within town limits. No access to unsealed routes which have received greater than 15mm of rain in the preceding 24 hours.
LGA Restriction Information Out of Districts - Far West Coast	Speed limits to be a maximum of 60km/h on all commodity routes. No access to commodity routes where there has been greater than 10mm of rain in any 24 hour period.
Northern Areas Council	All council-maintained commodity routes have a 60km/h speed restriction.
Port Pirie Regional Council	Restricted speed loaded or unloaded to 80km/h on sealed council roads outside town limits. Restricted speed loaded or unloaded to 60km/h on unsealed council roads outside town limits. Restricted speed loaded or unloaded to 40km/h on all council-maintained roads within town limits.
Southern Mallee District Council	All unsealed council-maintained commodity routes have an 80km/h speed restriction.
The Rural City of Murray Bridge	Restricted speed loaded or unloaded to 60km/h on council roads.
Wakefield Regional Council	All unsealed council-maintained commodity routes have a 70km/h speed restriction.
Wudinna District Council	Restricted speed loaded or unloaded to 70km/h on all unsealed council roads outside town limits. Restricted speed loaded or unloaded to 80km/h on all sealed council roads outside town limits. Restricted speed loaded or unloaded to 40km/h on all council-maintained roads within town limits. Restricted Access Vehicle (RAV) operators are required to inspect all unsealed routes which have received greater than 15mm of rain in the preceding 24 hours to ensure that the pavement will not be damaged by the RAV operation. Operators may be liable for the cost of pavement repairs.

Local council road manager conditions

Operators should also consult the South Australia Height Clearance Map and Limited Access Locations Information Bulletin on the Approved areas or routes page of the South Australia Government’s website.

Table 9: Local road manager conditions

Council name

Conditions

City of Adelaide

General access is not permitted for 19m B-doubles. These combinations can only access roads on the South Australian 23m and 26m B-double Networks.
Note: All other B-double combinations are as per the networks in the Notice.

City of Playford

City of Unley

Hamilton Boulevard, Wayville, is limited to 42.5t.

District Council of Ceduna

An eligible vehicle must not operate on unsealed roads for routes in an area that has received greater than 15mm of rain in the preceding 24 hours of the rain event.

An eligible vehicle whether loaded or unloaded, is restricted to the following speeds:

80km/h on sealed council-maintained roads with speed limits posted above 80km/h;
70km/h on unsealed council-maintained roads with speed limits posted above 60km/h;
40km/h on all council-maintained roads with speed limits posted at 60km/h or lower.

Northern Areas Council

The maximum speed limit on sealed local council roads is 80km/h, unless a traffic sign or road rule indicates a lesser speed limit.

The maximum speed limit on unsealed local council roads is 60km/h, unless a traffic sign or road rule indicates a lesser speed limit.

On unsealed roads, travel is suspended during periods of prolonged rain within the 24-hour period after the rainfall event or when the road's surface is holding pooled water.

Note: When a prolonged rainfall event occurs, the restriction is applied to allow sufficient time for the road and road pavement to dry, preventing damage.

The following roads are approved for 19m B-doubles at 50t (50.5t for complying steer vehicle). All other local council roads within the Northern Areas Council boundary are restricted to 42.5t.

Note: All other B-double combinations as per the networks in the Notice.

Township	Road name	Starting location	Finish location
Jamestown	Boundary Road	Eldena Road	Mannanarie Road
	Wenhams Road	Appila Road	RM Williams Way
	Reservoir Terrace	Eldena Road	Alexandra Terrace
	George Street	Boundary Road	RM Williams Way
	Murchland Drive	Humphris Terrace	RM Williams Way
	Irvine Street	Racecourse Road	RM Williams Way
	South Terrace	Williams Road	Brogan Road
	Brogan Road	Miltowie Road	Wilkins Highway
	Bute Street	RM Williams Way	Ayr Street

Port Pirie Regional Council

An eligible vehicle whether loaded or unloaded, is restricted to the following speeds:

80km/h on sealed council roads outside town limits.
60km/h on unsealed council roads outside town limits.
40km/h on all council-maintained roads within town limits.

Restricted structures

In the case of a B-double, travel is not permitted on the bridge structures listed in Table 10.

**Table 10:** South Australian restricted structures
Structure name	Structure location
Gumeracha Bridge	Over River Torrens on Torrens Valley Road between Chain of Ponds and Gumeracha.
Railway Tunnel (Murray Bridge)	Under Bridge Street, Murray Bridge.
Murray Bridge	Old Murray Bridge / Bridge Street, over the River Murray at Murray Bridge.
Birkenhead Bridge	Nelson Street, over Port River at Port Adelaide (the lifting bridge).
Railway Bridge at Gawler	On Overway Bridge Road, Gawler.

Non-participating road managers

This section lists road managers that have not yet provided support for the Notice.

Access to local roads in non-participating council areas is not approved for any combination under this Notice.

Access to state roads on the approved nominated networks in non-participating council areas is allowed, subject to Notice and network conditions.

Operators can apply for access to local roads in non-participating council areas by submitting a permit application through the NHVR Portal.

New South Wales - Click to expand

Ku-Ring-Gai Council

Queensland - Click to expand

Mornington Aboriginal Shire Council
Northern Peninsula Area Regional Aboriginal Council
Palm Island Aboriginal Council
Torres Strait Island Regional Council

South Australia - Click to expand

City of Victor Harbor
Corporation of the Town of Walkerville

Traffic advisory services - Click to expand

Prior to commencing any journey, operators should review traffic alerts, road closures, travel delays, and other traffic advisory information for participating jurisdictions.

Table 11 provides details and links to official traffic advisory services for each participating jurisdiction. For more information about a particular service, contact the relevant jurisdiction or department via the contact details listed on the service webpage.

**Table 11:** Traffic advisory services
Jurisdiction	Website	Purpose
Australian Capital Territory	Road closures	View current and upcoming road closures across the Australian Capital Territory.
New South Wales	Live Traffic NSW	View live information about incidents and changes in New South Wales traffic conditions.
Queensland	QLD Traffic	View live information about incidents and changes in Queensland traffic conditions, including outback road conditions.
South Australia	Outback Road Warnings	Access the latest information about temporary closures, restrictions, and warnings for outback roads north and west of Port Augusta.
South Australia	Traffic SA	View live information about incidents and changes in South Australia traffic conditions. Traffic SA is available as a mobile app. See Addinsight download details on the Traffic SA website.
Tasmania	Tasmanian Police Community Alerts	View Tasmania Police alerts for road closures due to emergencies or special events.
	TasALERT	View emergency warnings and incidents across Tasmania, including mapped road closures.
	Tasmanian Roadworks map	Access the latest information about planned roadworks and road closures across Tasmania, including a map of current roadworks.
Victoria	VicTraffic	View live information about incidents and changes in Victoria traffic conditions.

Applying for a permit - Click to expand

Access permit applications are required for heavy vehicles that don’t comply with the conditions set out in a notice and when accessing routes that aren’t covered on an approved network.

The following pages provide useful information and resources for submitting access permit applications:

Do I need a permit?: Information and resources for determining whether a road access permit, or a Notice is required to operate on Australian roads.
Access permit application process: Information, resources, and instructions for submitting a valid access permit application.

Related notices

In this tab, you will find a list of state and territory notices and declarations related to the National Class 2 B-Double Authorisation Notice 2024 (No.1).

A related notice or declaration may be comparable with this Notice or provide alternatives for operators to find the appropriate notice under which to operate.

Related national notices

Jurisdiction	Notice
National	National Class 2 4.6m high and/or 25m Long Vehicle Carrier Authorisation Notice 2024 (No.1) Authorises the use of Vehicle Carriers from 4.3 to 4.6 metres in height, or from 19 to 25 metres in length, or both, in stated areas or on stated routes, during stated hours of stated days and states the conditions under which these Vehicle Carriers may be used.
National Class 2 Heavy Vehicle 4.6m High Livestock Carrier Authorisation Notice 2024 (No.1) Authorises the use of Livestock Carriers from 4.3 to 4.6 metres in height in stated areas or stated routes, during stated hours of stated days and to state the conditions under which these Livestock Carriers may be used.
National Class 2 Road Train Authorisation Notice 2022 (No.3) Provides complying road trains access in New South Wales, Queensland, South Australia and Victoria. The national notice introduces simplified and more nationally consistent conditions for road trains, supporting more seamless cross-border access.
National Class 3 Drought Assistance Dimension Exemption Notice 2023 (No.1) Exempts eligible vehicles from complying with certain dimension requirements when transporting specified commodities for consumption by livestock in declared drought affected areas.
National Class 3 Heavy Vehicle 4.6m High by Construction Semitrailer Dimension Exemption Notice 2024 (No.1) Exempts a stated category of Class 3 heavy vehicles from the height limit stated in section 8 of Schedule 6 of the Heavy Vehicle (Mass, Dimension and Loading) National Regulation. Please note the following supporting document for this Notice: National Class 3 4.6m High Semitrailer Dimension Exemption Notices Operator's Guide
National Class 3 Mechanical Tarping and Safety Harness Systems Dimension Exemption Notice 2024 (No.1) Exempts a stated category of Class 3 heavy vehicles from the width limit in section 7(1) of Schedule 6 of the Heavy Vehicle (Mass, Dimension and Loading) National Regulation.
National Class 3 Road Train Prime Mover Dimension and Mass Exemption Notice 2022 (No.1) Provides length exemption to eligible combinations under the Notice. It also provides flexibility for operators of road train prime movers to continue their travel when decoupling from a road train combination and to access networks when not operating as a road train.
National Class 3 Vehicle Carrier Exemption Notice 2024 (No.1) Exempts the stated categories of Class 3 heavy vehicles from the stated dimension requirements of the Heavy Vehicle (Mass, Dimension and Loading) National Regulation specified in the Notice, subject to specified conditions.
National Heavy Vehicle Standards (Road Train Non-Standard Coupling Height) Exemption Notice 2021 (No.1) Exempts a heavy vehicle to which it applies from specified requirements of the Heavy Vehicle (Vehicle Standards) National Regulation.
National Heavy Vehicle Work and Rest Hours Exemption (Personal Use – Standard Hours) Notice 2024 (No.1) Exempts specified categories of permitted personal activity from the definition of work, with the intention that those activities are not counted as work time for a driver under Standard Hours. Please note the following supporting document for this Notice: Heavy Vehicle Advisory Publication - Personal use of fatigue-regulated heavy vehicles (PDF, 412KB)

Jurisdiction

Notice

National

National Class 2 4.6m high and/or 25m Long Vehicle Carrier Authorisation Notice 2024 (No.1)

Authorises the use of Vehicle Carriers from 4.3 to 4.6 metres in height, or from 19 to 25 metres in length, or both, in stated areas or on stated routes, during stated hours of stated days and states the conditions under which these Vehicle Carriers may be used.

National Class 2 Heavy Vehicle 4.6m High Livestock Carrier Authorisation Notice 2024 (No.1)

Authorises the use of Livestock Carriers from 4.3 to 4.6 metres in height in stated areas or stated routes, during stated hours of stated days and to state the conditions under which these Livestock Carriers may be used.

National Class 2 Road Train Authorisation Notice 2022 (No.3)

Provides complying road trains access in New South Wales, Queensland, South Australia and Victoria. The national notice introduces simplified and more nationally consistent conditions for road trains, supporting more seamless cross-border access.

National Class 3 Drought Assistance Dimension Exemption Notice 2023 (No.1)

Exempts eligible vehicles from complying with certain dimension requirements when transporting specified commodities for consumption by livestock in declared drought affected areas.

National Class 3 Heavy Vehicle 4.6m High by Construction Semitrailer Dimension Exemption Notice 2024 (No.1)

Exempts a stated category of Class 3 heavy vehicles from the height limit stated in section 8 of Schedule 6 of the Heavy Vehicle (Mass, Dimension and Loading) National Regulation.

Please note the following supporting document for this Notice:

National Class 3 4.6m High Semitrailer Dimension Exemption Notices Operator's Guide

National Class 3 Mechanical Tarping and Safety Harness Systems Dimension Exemption Notice 2024 (No.1)

Exempts a stated category of Class 3 heavy vehicles from the width limit in section 7(1) of Schedule 6 of the Heavy Vehicle (Mass, Dimension and Loading) National Regulation.

National Class 3 Road Train Prime Mover Dimension and Mass Exemption Notice 2022 (No.1)

Provides length exemption to eligible combinations under the Notice. It also provides flexibility for operators of road train prime movers to continue their travel when decoupling from a road train combination and to access networks when not operating as a road train.

National Class 3 Vehicle Carrier Exemption Notice 2024 (No.1)

Exempts the stated categories of Class 3 heavy vehicles from the stated dimension requirements of the Heavy Vehicle (Mass, Dimension and Loading) National Regulation specified in the Notice, subject to specified conditions.

National Heavy Vehicle Standards (Road Train Non-Standard Coupling Height) Exemption Notice 2021 (No.1)

Exempts a heavy vehicle to which it applies from specified requirements of the Heavy Vehicle (Vehicle Standards) National Regulation.

National Heavy Vehicle Work and Rest Hours Exemption (Personal Use – Standard Hours) Notice 2024 (No.1)

Exempts specified categories of permitted personal activity from the definition of work, with the intention that those activities are not counted as work time for a driver under Standard Hours.

Please note the following supporting document for this Notice:

Heavy Vehicle Advisory Publication - Personal use of fatigue-regulated heavy vehicles (PDF, 412KB)

Related state and territory notices and declarations

Jurisdiction	Notice
Australian Capital Territory	Australian Capital Territory Higher Mass Limits Declaration 2021 (No.1) Authorises eligible heavy vehicles to operate on Higher Mass Limits (HML) on stated areas and routes in the Australian Capital Territory.
New South Wales	New South Wales Higher Mass Limits Declaration 2020 (No.1) \| PDF, 707KB Please note the following supporting document for this Notice: New South Wales Higher Mass Limits Declaration 2020 - Information Sheet (PDF, 333KB)
New South Wales Class 3 Converter Dolly Mass and Dimension Exemption Notice 2023 (No.1) Provides exemptions from mass and dimension requirements for Class 3 heavy combinations that are towing an unladen converter dolly. It also provides conditions of operation under those exemptions, including stated areas and routes upon which the exempted vehicle may operate.
Queensland	Queensland Class 3 Converter Dolly Combination Exemption Notice 2024 (No.1) Exempts Class 3 heavy vehicles towing an unladen converter dolly from the mass limit in Schedule 1, Part 1, Clause2 (1)(a)(iv), and the dimension limit in Schedule 6, Part 2, Clause 3(1)(a) of the Heavy Vehicle (Mass, Dimension and Loading) National Regulation.
Queensland Higher Mass Limits Declaration 2024 (No.1) Authorises heavy vehicles eligible to use Higher Mass Limits (HML) on stated areas and routes, during stated hours of stated days and to state the conditions under which they may be used.
South Australia	South Australia Class 3 Baled Commodity Exemption Notice 2024 (No.1) Provides an exemption from height and width dimension requirements for certain configurations of heavy vehicles while they are transporting baled commodities. Vehicles operating under this notice may operate up to the height and width limits specified, provided that they meet the specified conditions.
South Australia Class 3 Converter Dolly Combination Exemption Notice 2024 (No.1) Exempts Class 3 heavy articulated motor vehicles, and B-doubles, towing an unladen converter dolly, from the stated mass and dimension limits in Schedule 1 and Schedule 6 of the Heavy Vehicle (Mass, Dimension and Loading) National Regulation.
South Australia Class 3 Livestock Transportation Exemption Notice 2023 (No.1) Exempts the use of Class 3 combinations from stated mass limits in Schedule 1 of the Heavy Vehicle (Mass, Dimension and Loading) National Regulation and allows for a specific length exemption for specific 27.5m B-Doubles carrying livestock on a specific route. Please note supporting information for this notice can be found on the SA Government - Transport of livestock webpage.
South Australian Class 3 Road Friendly Suspension Mass Exemption Notice 2023 (No.1) Exempts certain heavy vehicles and combinations fitted with certified Road Friendly Suspension from mass requirements set out in the Heavy Vehicle (Mass Dimension and Loading) National Regulation, allowing operation at masses that are equivalent to Higher Mass Limits under the Heavy Vehicle National Law (HVNL). This Notice replaces the South Australia Class 3 (Application of Higher Mass Limits) Mass Exemption Notice.
Tasmania	Tasmania Higher Mass Limits Declaration 2021 (No.1) Authorises the use of certain categories of heavy vehicles under higher mass limits on stated areas and routes in Tasmania.
Victoria	Victoria Class 2 Converter Dolly Combination Authorisation Notice 2023 (No.1) Authorises Class 2 heavy combinations consisting of a prime mover towing a semi-trailer and converter dolly that is not supporting a semitrailer.
Victoria Class 3 Prime Mover and Semi-Trailer (Transport of Containers) Exemption Notice 2023 (No.1) Grants exemptions from mass requirements for a Class 3 heavy vehicle that is a combination consisting of a 3-axle prime mover towing a 3-axle semi-trailer that is loaded with a freight container.
Victoria Class 3 Rear Loader Waste Vehicles Rear Overhang Exemption Notice 2023 (No.1) Grants exemptions from dimension requirements for a Class 3 heavy vehicle that is a rear loading vehicle used for waste collection.
Victoria Class 3 Road Friendly Suspension Mass Exemption Notice 2024 (No.1) Exempts certain heavy vehicles fitted with certified road friendly suspension from mass requirements set out in the Heavy Vehicle (Mass Dimension and Loading) National Regulation.

Jurisdiction

Notice

Australian Capital Territory

Australian Capital Territory Higher Mass Limits Declaration 2021 (No.1)

Authorises eligible heavy vehicles to operate on Higher Mass Limits (HML) on stated areas and routes in the Australian Capital Territory.

New South Wales

New South Wales Higher Mass Limits Declaration 2020 (No.1) | PDF, 707KB

Please note the following supporting document for this Notice:

New South Wales Higher Mass Limits Declaration 2020 - Information Sheet (PDF, 333KB)

New South Wales Class 3 Converter Dolly Mass and Dimension Exemption Notice 2023 (No.1)

Provides exemptions from mass and dimension requirements for Class 3 heavy combinations that are towing an unladen converter dolly. It also provides conditions of operation under those exemptions, including stated areas and routes upon which the exempted vehicle may operate.

Queensland

Queensland Class 3 Converter Dolly Combination Exemption Notice 2024 (No.1)

Exempts Class 3 heavy vehicles towing an unladen converter dolly from the mass limit in Schedule 1, Part 1, Clause2 (1)(a)(iv), and the dimension limit in Schedule 6, Part 2, Clause 3(1)(a) of the Heavy Vehicle (Mass, Dimension and Loading) National Regulation.

Queensland Higher Mass Limits Declaration 2024 (No.1)

Authorises heavy vehicles eligible to use Higher Mass Limits (HML) on stated areas and routes, during stated hours of stated days and to state the conditions under which they may be used.

South Australia

South Australia Class 3 Baled Commodity Exemption Notice 2024 (No.1)

Provides an exemption from height and width dimension requirements for certain configurations of heavy vehicles while they are transporting baled commodities. Vehicles operating under this notice may operate up to the height and width limits specified, provided that they meet the specified conditions.

South Australia Class 3 Converter Dolly Combination Exemption Notice 2024 (No.1)

Exempts Class 3 heavy articulated motor vehicles, and B-doubles, towing an unladen converter dolly, from the stated mass and dimension limits in Schedule 1 and Schedule 6 of the Heavy Vehicle (Mass, Dimension and Loading) National Regulation.

South Australia Class 3 Livestock Transportation Exemption Notice 2023 (No.1)

Exempts the use of Class 3 combinations from stated mass limits in Schedule 1 of the Heavy Vehicle (Mass, Dimension and Loading) National Regulation and allows for a specific length exemption for specific 27.5m B-Doubles carrying livestock on a specific route.

Please note supporting information for this notice can be found on the SA Government - Transport of livestock webpage.

South Australian Class 3 Road Friendly Suspension Mass Exemption Notice 2023 (No.1)

Exempts certain heavy vehicles and combinations fitted with certified Road Friendly Suspension from mass requirements set out in the Heavy Vehicle (Mass Dimension and Loading) National Regulation, allowing operation at masses that are equivalent to Higher Mass Limits under the Heavy Vehicle National Law (HVNL). This Notice replaces the South Australia Class 3 (Application of Higher Mass Limits) Mass Exemption Notice.

Tasmania

Tasmania Higher Mass Limits Declaration 2021 (No.1)

Authorises the use of certain categories of heavy vehicles under higher mass limits on stated areas and routes in Tasmania.

Victoria

Victoria Class 2 Converter Dolly Combination Authorisation Notice 2023 (No.1)

Authorises Class 2 heavy combinations consisting of a prime mover towing a semi-trailer and converter dolly that is not supporting a semitrailer.

Victoria Class 3 Prime Mover and Semi-Trailer (Transport of Containers) Exemption Notice 2023 (No.1)

Grants exemptions from mass requirements for a Class 3 heavy vehicle that is a combination consisting of a 3-axle prime mover towing a 3-axle semi-trailer that is loaded with a freight container.

Victoria Class 3 Rear Loader Waste Vehicles Rear Overhang Exemption Notice 2023 (No.1)

Grants exemptions from dimension requirements for a Class 3 heavy vehicle that is a rear loading vehicle used for waste collection.

Victoria Class 3 Road Friendly Suspension Mass Exemption Notice 2024 (No.1)

Exempts certain heavy vehicles fitted with certified road friendly suspension from mass requirements set out in the Heavy Vehicle (Mass Dimension and Loading) National Regulation.

Resources

Participating jurisdiction heavy vehicle resources

For more information about operating a heavy vehicle in participating jurisdictions, refer to the following sites:

Australian Capital Territory: Transport Canberra and City Services - Heavy vehicle conditions and network
New South Wales: Transport for New South Wales (TfNSW) - Heavy vehicles
Queensland: Department of Transport and Main Roads (TMR) - Heavy vehicles
South Australia: Department for Infrastructure and Transport (DIT) - Heavy vehicles
Tasmania: Department of State Growth (DSG) - Heavy vehicles
Victoria: Department of Transport and Planning - Heavy vehicle industry

Tools and calculators

Note: This information is intended to provide general guidance only and does not constitute legal advice. We encourage you to obtain independent advice about your legal obligations. If you have any feedback on the information provided please contact us at info@nhvr.gov.au

B-double MDL Dimension and Axle Spacing Check Sheet

B-Double MDL Dimension and Axle Spacing Check Sheet (XLSX, 37KB)

Considerations

All of the distances are in metres (m), for example, 1.2m and not 1200mm or 120cm
All masses are in tonnes (t) and General Mass Limits (GML), even if requesting Higher Mass Limits (HML)
- Steer: 6t
- Tandem: 16.5t
- Tri: 20.0t
Distances for axle group length and spacing between axle groups are measured between the axle centres of the extreme axles of each group

Check sheet instructions

If required, open the 'Vehicle Dimensions' tab and enter vehicle length, height and width; This will show compliance with Heavy Vehicle (Mass, Dimension and Loading) National Regulation (MDL) dimensions.
Enter the number of axles for each axle group in light grey boxes
Enter MDL GML axle/axle group mass (tonnes) for each axle/axle group in white boxes. (Note: steer axle mass is recorded as 6t)
In blue boxes, alternately record axle group length (metres) for each axle group (Note: 0 for a single axle) and distance between separate groups
Scroll across to right and compliance with MDL Schedule 1 tables is indicated as PASS or FAIL

Note: If the result is a FAIL, reducing masses at step 4 or increasing distances in step 5 could provide a PASS result. A PASS result means the given information complies with B-double axle spacings mass limits for general access (up to 50.0t).

Figure 8 shows a 7 axle B-double (single steer, tandem drive prime mover, tandem axle A trailer, tandem axle B trailer) 4 axle groups and 3 axle spacings between groups. Distances for axle group length and spacing between axle groups are measured between the axle centres of the extreme axles of each group.

Image is of an 7 axle b-double with axle spacing markings below the axle groups to show the spacing between axle groups.

Changes and updates

Date	Summary	Links to resources and communications
9 September 2024	Update to Table 7: Approved state and territory routes to include correct naming and links from the National Network Map.
26 July 2024	Addition of the B-Double MDL Dimension and Axle Spacing Check Sheet (XLSX, 37KB) resource.
1 February 2024	National Class 2 B-Double Authorisation Notice 2024 (No.1) commenced.	C2024G00054