Heavy Vehicle Licence - LR / MR / HR / HC / MC under the HVNL

Light Rigid (LR) Licence

The Light Rigid licence authorises you to drive a rigid vehicle (a vehicle whose prime mover and load-carrying body are permanently connected) with a GVM exceeding 4.5 tonnes but not exceeding 8 tonnes. You may also tow a trailer with a GVM not exceeding 9 tonnes, provided the combination's total GCM does not exceed 8 tonnes.

Vehicles in the LR class include: small box trucks, food delivery trucks, tippers in the 5–8 tonne GVM range, small bus/coach conversions, and many work vehicles used in the trades. The LR is the most accessible heavy vehicle licence - it requires a minimum holding period of 1 year on your car (C class) licence before you can apply.

The LR licence test involves a knowledge test covering load management, pre-trip inspection procedures, and the road rules specific to heavy vehicles, followed by a practical driving test demonstrating control of the vehicle in traffic, reversing, and manoeuvring. The test is conducted in a vehicle belonging to the candidate or provided by the testing authority.

• GVM: over 4.5 tonnes up to 8 tonnes (rigid vehicle)
• Towing: trailer GVM up to 9 tonnes (total GCM must not exceed 8 tonnes)
• Prerequisite: 1 year on C class licence (full, not learner or P-plate)
• Minimum age: 18 years
• Typical vehicles: small delivery trucks, tradespeople's work vehicles, small tippers

Medium Rigid (MR) Licence

The Medium Rigid licence covers rigid vehicles with a GVM exceeding 8 tonnes, with no more than 2 axles. You may also tow a trailer with a GVM not exceeding 9 tonnes. The MR class includes LR class vehicles (an MR licence includes the LR entitlement).

Typical MR vehicles include: rigid trucks in the 8–18 tonne GVM range with two axles (steer axle and one drive axle), concrete agitators (smaller capacity), some bus and coach configurations (a separate bus or coach endorsement may be required), refrigerated transport trucks used for food distribution, and medium-duty service vehicles operated by utilities and councils.

To obtain an MR licence, you must have held a full LR (or C class in some states) licence for a minimum period, which varies by state. The practical test is more demanding than LR - it assesses gear selection and use of range/splitter transmissions, loaded vehicle handling, reversing into a dock or bay, and pre-trip vehicle inspection including brake system checks.

• GVM: over 8 tonnes, maximum 2 axles (rigid vehicle)
• Includes LR licence entitlement
• Prerequisite: full LR or C licence held for minimum period (varies by state)
• Range/splitter gearboxes common in MR trucks - practical test assesses gear control
• Typical vehicles: 8–18 tonne rigid trucks, concrete agitators, some buses

Heavy Rigid (HR) Licence

The Heavy Rigid licence is one of the most significant milestones in the heavy vehicle licence progression. It authorises you to drive a rigid vehicle with 3 or more axles, regardless of GVM. HR includes LR and MR entitlements. You may tow a trailer with a GVM not exceeding 9 tonnes.

Vehicles in the HR class include: semi-trailer prime movers without a trailer attached (prime movers have 3+ axles); tri-axle rigid trucks (tray, tipper, curtainsider, refrigerated); concrete agitators and pump trucks; heavy buses and coaches (50+ seats, 3-axle configurations); concrete pump trucks; and refuse collection vehicles. The HR is essential for most professional heavy transport roles.

A medical assessment (commercial vehicle medical) becomes mandatory from the HR licence class. The medical assesses vision, cardiovascular fitness, and the absence of conditions that could affect safe operation of heavy vehicles. The practical test includes an extended road assessment in urban and highway conditions, assessment of coupling and uncoupling procedures (where applicable), and a comprehensive pre-trip inspection covering all systems.

• GVM: any GVM - 3 or more axles (rigid vehicle)
• Includes LR and MR entitlements
• Commercial vehicle medical mandatory - assessed by an approved medical examiner
• Prerequisite: full MR (or LR in some states) licence held for minimum period
• Typical vehicles: semi prime movers (bobtail), tri-axle rigids, heavy buses, concrete agitators

Heavy Combination (HC) Licence

The Heavy Combination licence authorises the operation of a prime mover with a semi-trailer (commonly called a "semi" or "B-single"). This is the licence required for most linehaul, interstate freight, and bulk transport operations using a standard semi-trailer configuration. HC includes all lower rigid class entitlements.

Vehicles in the HC class: prime mover and semi-trailer combinations; B-singles (the standard articulated semi-trailer used across Australia); some special-purpose articulated vehicles. HC does not authorise the operation of road trains, B-doubles, or other multi-combination vehicles - those require an MC licence.

The HC practical test is significantly more complex than HR. It assesses: coupling and uncoupling of the semi-trailer (including checking fifth wheel engagement, air line connections, and trailer brake operation); reversing on a straight run and into a simulated dock; swept path and off-tracking management through tight turns; and highway driving with a loaded trailer. Knowledge of load restraint, mass and dimension limits, and fatigue regulations is assessed.

• Authorises: prime mover + semi-trailer (B-single, articulated semi)
• Does NOT authorise B-doubles, road trains, or other multi-combinations
• Prerequisite: full HR licence held for minimum period (varies by state)
• Coupling/uncoupling assessment is a key component of the practical test
• Load restraint and CoR obligations - study the Load Restraint Guide (NHVR)

Multi-Combination (MC) Licence

The Multi-Combination licence is the highest class of heavy vehicle licence in Australia. It authorises you to operate the largest and most complex road vehicles in the world - including B-doubles, B-triples, road trains (A-doubles, A-triples), and other combinations involving multiple trailers connected by a converter dolly or fifth-wheel coupling. MC includes all lower class entitlements.

Multi-combination vehicles are the backbone of Australian long-haul freight, particularly in outback and resource-sector transport where road trains are common. A B-double typically measures 25 metres in length and has a GCM of up to 68.5 tonnes. A typical Type 2 road train can be up to 36.5 metres long with a GCM of 79.5 tonnes.

The MC practical test and training requirements are the most demanding in the heavy vehicle licensing system. You must demonstrate: coupling and uncoupling of multiple trailers including dollies; backing and manoeuvring a B-double or road train; swept path management; dolly adjustment and fifth wheel height matching; and full understanding of performance-based standards (PBS) that govern longer, heavier vehicle combinations. Training must be completed with an approved heavy vehicle training provider before the test.

• Authorises: B-doubles, B-triples, road trains (A-doubles, A-triples), and all lower classes
• Prerequisite: full HC licence held for minimum period (varies by state - typically 1–2 years)
• Road train operation: additional Performance-Based Standards (PBS) schemes apply
• B-double max length: 25 metres; GCM up to 68.5 tonnes
• Road train operation restricted to approved routes and areas - check NHVR route approvals

Chain of Responsibility (CoR)

Chain of Responsibility is one of the most important concepts in the HVNL. It recognises that safety outcomes on Australian roads are not determined solely by drivers - they are influenced by a chain of parties including employers, prime contractors, schedulers, loaders, consignors, consignees, and loading managers. Under CoR, any party in the supply chain who has the ability to influence safety outcomes - and fails to exercise that influence - can be held legally liable for breaches.

This means that a company that sets delivery schedules that can only be met by speeding or driving fatigued - even if they never instruct the driver to break the law - can be prosecuted for HVNL breaches. Similarly, a shipper who overloads a vehicle or a receiver who causes unreasonable delays (increasing fatigue pressure on drivers) is potentially liable under CoR.

• CoR applies to every party in the supply chain with influence over safety
• Maximum penalties for CoR breaches: severe, including prison for executives
• Employers must not set schedules that require drivers to break road laws
• Drivers are still responsible for their own conduct - CoR extends liability, it does not replace it
• A party cannot avoid liability by claiming they did not know about the breach

Fatigue Management for Heavy Vehicle Drivers

Driver fatigue is one of the leading causes of fatal heavy vehicle crashes in Australia. The HVNL establishes a mandatory Basic Fatigue Management (BFM) framework that defines maximum work and driving hours, minimum rest periods, and record-keeping requirements for all heavy vehicle drivers.

The standard work and rest rules under BFM set maximum driving hours (no more than 5.5 hours continuous driving without a 15-minute break), maximum work hours in a 24-hour period (12 hours work, 12 hours rest), and weekly accumulation limits. Advanced Fatigue Management (AFM) and Basic Fatigue Management accreditation schemes allow operators to operate under modified hours with additional safety systems in place.

• Standard: maximum 5.5 hours continuous driving then mandatory 15-minute rest
• Standard: maximum 12 hours work in any 24-hour period
• Standard: minimum 7 hours continuous rest in each 24-hour period
• Work diaries (logbooks) must be completed accurately - falsifying a diary is a serious offence
• Electronic Work Diaries (EWDs) are mandatory for some operators and progressively expanding

Mass, Dimension, and Loading Requirements

The HVNL strictly regulates the maximum mass and dimensions of heavy vehicles on Australian roads. Exceeding mass limits damages road surfaces, increases braking distances, and dramatically increases the severity of crash outcomes. Exceeding dimension limits can create clearance hazards on bridges, underpasses, and through road corridors.

Key mass limits include: General Mass Limits (GML) which apply to all vehicles, and Higher Mass Limits (HML) which apply to vehicles with road-friendly suspensions on approved roads. Load restraint is regulated by the NHVR's Load Restraint Guide, which prescribes the minimum restraint forces required to prevent a load shifting during normal driving, emergency braking, and cornering.

• Standard single steer axle: 6 tonnes maximum (GML)
• Standard tandem drive axle group: 16.5 tonnes maximum (GML)
• Maximum vehicle width: 2.5 metres (standard), 2.55 m with road-friendly suspension
• Load restraint must withstand 0.8g deceleration, 0.5g lateral, 0.2g uplift - minimum
• Overloaded vehicles can be directed to unload at the roadside - at the operator's cost

Vehicle Standards and Pre-Trip Inspection

The HVNL requires heavy vehicles to meet national vehicle standards at all times they are operated on a public road. The driver is responsible for ensuring the vehicle is roadworthy before commencing a journey. A systematic pre-trip inspection is both a legal obligation and a professional standard expected of all heavy vehicle drivers.

A complete pre-trip inspection covers: tyres (pressure, tread depth, condition, correct fitment); brake system (air pressure build and hold, brake adjustment, spring brake operation); lights (all markers, indicators, reversing, brake lights); coupling (fifth wheel engagement, kingpin security, airlines, electrical connection); trailer (tyres, lights, load security, mudguards, body condition); and fluid levels and engine bay. Any defect that affects safety must be repaired before the vehicle can legally operate.

• Pre-trip inspection is a legal obligation - not optional
• Air brakes: build to operating pressure within the required time, governor cuts out correctly, no excessive pressure loss
• Tyre tread minimum: 1.5 mm across 75% of width for steering tyres
• Any defect affecting safety = the vehicle must not operate until repaired
• Document your pre-trip inspection - some operators require a written record