HTV Driving Theory study guide
HTV Driving Theory · Work through your exam, one topic at a time.
The HTV driving theory test is the knowledge-assessment step for drivers who want to operate heavy transport vehicles - tractor-trailers, rigid lorries and similar high-mass combinations. It is aimed at learner drivers progressing to a heavy-vehicle licence, at drivers adding a heavier class to an existing licence, and at fleet operators who need staff to demonstrate formal road-knowledge competence. The HTV Driving Theory study guide has 8 sections and about 2,986 words.
01Road Traffic Law, Signs, Markings and Right-of-Way
This domain checks whether you can read the road environment quickly: regulatory, warning and guide signs; pavement markings; and who must yield when movements conflict. Heavy vehicles add restricted routes, bridge limits and lane-use rules.
371 words, about 2 min02Pre-Trip Inspection, Vehicle Roadworthiness and Defect Reporting
This domain tests a systematic walk-around inspection, recognition of out-of-service defects, and the paperwork that proves a defect was reported and repaired. The examiner looks for critical-item knowledge, not a vague "check the truck".
353 words, about 2 min03Vehicle Controls, Handling, Dimensions and Stability
This domain covers control use, steering technique, gearing and retarders, vehicle dimensions, mass effects, centre of gravity, off-tracking and rollover risk. Questions often ask what a driver should do before a hazard, not during it.
390 words, about 2 min04Defensive Driving, Hazard Perception and Speed Management
This domain tests scanning, following distance, speed selection for conditions and early hazard recognition. Heavy vehicles need longer stopping distances, so the exam rewards seeing a hazard before it becomes an emergency.
361 words, about 2 min05Cargo Loading, Weight Distribution and Load Securement
This domain tests axle and gross mass limits, load placement, centre of gravity and securement. The examiner wants to see that you understand why a load is unsafe, not just that straps were used.
372 words, about 2 min06Braking Systems, Air Brakes and Auxiliary Systems
This domain covers air-brake components, daily tests, brake fade, retarders, ABS and spring brakes. Questions often ask what a gauge reading or warning means and whether the vehicle may be driven.
375 words, about 2 min07Driver Hours, Rest Periods and Record-Keeping
This domain tests fatigue management: maximum driving and on-duty limits, minimum breaks and rest, fitness for duty, and accurate records. The examiner wants practical judgement about when to stop, not just memorised numbers.
384 words, about 2 min08Incidents, Breakdowns, Emergency Response and First Aid
This domain tests scene safety, warning other traffic, emergency calls, fire and spill response, and basic first aid. The priority order is always protect yourself and the scene before assisting.
380 words, about 2 min