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About this exam

A heavy vehicle licence in Cambodia is the authorisation that lets a driver operate large goods vehicles, tractor units with trailers, and heavy passenger vehicles on public roads. It matters most to people who drive for a living - long-haul freight drivers, construction and tipper operators, port and warehouse shuttle drivers, and bus or coach drivers - and to employers who must show that their drivers are properly licensed for the class of vehicle they operate. The examination is administered by the Ministry of Public Works and Transport through its driver licensing system, and it combines a written theory paper with a practical driving test in the vehicle category applied for. Theory questions are drawn from Cambodian traffic law, road signs, signals and markings, plus heavy-vehicle-specific material: pre-trip inspection and load security, defensive driving and hazard perception, vehicle controls and manoeuvring, braking and stability with a laden vehicle, emergency response and first aid, and fitness rules covering fatigue, alcohol and drugs. The practical test assesses control of a large vehicle at low speed and in traffic, observation, mirror use, lane discipline and safe judgment. Preparation should be deliberate: learn the road signs and right-of-way rules until they are automatic, practise the pre-trip inspection as a fixed checklist, then spend supervised hours in the actual vehicle class, including reversing and tight manoeuvres. Logistics such as fees, scheduling and the current pass mark are published by the Ministry; confirm them on its official site before you book.

What you'll study

Common questions

About Cambodia Heavy Vehicle Driving Test preparation

What does the heavy vehicle driving test actually consist of?

Two parts: a multiple-choice theory paper on traffic law, signs, signals and markings plus heavy-vehicle topics such as inspection, load security, braking and emergency procedures, and a practical driving test in the class of vehicle you applied for. The practical covers vehicle control, observation, manoeuvring and behaviour in real traffic.

How many questions are on the theory paper and how long does it take?

Those details are set by the Ministry of Public Works and Transport and can change between sessions, so they are not fixed here. Check the Ministry's official driver licensing information for the current question count, time allowance and pass mark before your test date.

What score do I need to pass, and what does the test cost?

The pass mark and the fee are published by the Ministry of Public Works and Transport, not by this page. Because they are revised periodically, confirm the current figures through the Ministry's official channels when you register. Do not rely on figures quoted by other candidates, driving schools or older forum posts.

How difficult is the test for someone who already drives a truck?

Experienced drivers usually find the theory paper the bigger obstacle, because it rewards precise knowledge of signs, markings and right-of-way rules rather than road instinct. The practical is harder for candidates who have never reversed a long vehicle or judged clearance with a laden body. Both are passable with structured practice.

If I fail, how soon can I retake it?

Retake rules, waiting periods and any additional fees are set by the Ministry and may differ between theory and practical components. Ask at the licensing office where you sat the test, or check the Ministry's official information, so you plan around the correct interval rather than assuming a fixed waiting time.

In what order should I study the eight topic areas?

Start with traffic law, signs, signals and markings, since they underpin every other section. Then take vehicle inspection and load security, followed by braking, speed control and stability. Add safe and defensive driving, then controls and manoeuvring with hands-on practice. Finish with first aid and emergency procedures, fitness rules, and licensing documentation.

Where do candidates most often lose marks?

Common failures are missed mirror and shoulder checks, poor observation at junctions, rolling stops, incorrect lane position with a wide vehicle, and unstable or harsh braking. On the theory side, candidates confuse similar warning signs and misjudge following distances for heavy vehicles. Load security and pre-trip inspection questions also catch people who skipped that section.

Can I take the practical test in any heavy vehicle?

No. The practical is conducted in the vehicle class matching the licence category you apply for, and the vehicle must be roadworthy and correctly registered for that purpose. Confirm the accepted vehicle type and any documentation required with the licensing office before test day, because arriving with an unsuitable vehicle can cost you the slot.

How should I prepare for the practical driving section?

Get supervised hours in the same vehicle class, not a smaller truck. Practise low-speed manoeuvring, reversing, tight turns and stopping smoothly with a load, and narrate your mirror checks so they become habitual. Drive the routes near the test centre and rehearse the pre-trip inspection aloud until the checklist is automatic.