Cambodia Category B Driving Test common mistakes
Cambodia Category B Driving Test · Understand the traps and how to avoid them.
Treating the right-hand-drive rule as a formality: at an uncontrolled junction the candidate assumes the larger vehicle or the one on the main road always goes first, instead of yielding to traffic approaching from the right.
Cambodia drives on the right, and many candidates carry over habits from neighbouring countries or from informal riding experience where 'big beats small' and 'straight road beats side road' are treated as the real rule. They memorise the phrase 'yield to the right' but never apply it to a concrete junction scenario.
What to do instead
Drill the rule with concrete junction descriptions: two vehicles arriving at the same time at an unmarked crossroads, a motorbike from the right versus a car from the left, and so on. For each case state aloud who yields and why. Remember that size and road width do not create priority; the right-hand rule applies unless signs, signals, or a marked priority road say otherwise.
Confusing the meaning of the main sign categories, for example treating a blue circular sign as a warning, a red-bordered triangle as a prohibition, or a yellow diamond as a 'stop' rather than a priority-road sign.
Candidates learn signs by memorising individual pictures rather than by learning what shape and colour encode. Under exam pressure an unfamiliar sign is guessed from its picture rather than decoded from its form.
What to do instead
Learn the grammar of signs first: red-bordered circles prohibit, blue circles instruct, red-bordered triangles warn, rectangles inform, and the yellow diamond marks a priority road. Then sort a list of signs by shape and colour before learning the individual meanings. If a sign is unfamiliar in the exam, reason from its shape and colour.
Answering alcohol questions using a remembered number (such as 'one can of beer is fine') instead of the legal limit and the practical rule that any alcohol impairs driving.
Candidates mix up limits quoted in other countries, or believe that a small amount below the limit is safe. They also underestimate how quickly alcohol is absorbed and how long it stays in the body.
What to do instead
Learn the Cambodian blood-alcohol limit for the licence class being tested and the penalties for exceeding it, and separate that legal fact from the safety fact that the only reliable rule is not to drink and drive. Practise questions on absorption time, the effect of fatigue and food, and the fact that coffee, sleep, or a cold shower do not speed up elimination.
Misreading the sequence of traffic-light phases, especially flashing amber, a green arrow alongside a red circle, or a light that has just changed, and answering as if a green light always means 'go without checking'.
Candidates learn 'red stop, green go' as a slogan and never study the intermediate states. They also forget that a green light gives permission subject to the duty to yield to pedestrians and to clear the junction safely.
What to do instead
Learn each state separately: red means stop behind the line; flashing amber means proceed with caution and give way; green means go only if the junction is clear; a green arrow only protects the movement it indicates. For each state, write one sentence on what the driver must still check before moving.
Failing to apply the following-distance rule in real terms: answering that two seconds is always enough at any speed, or that a fixed number of metres works regardless of speed and road surface.
Candidates memorise a single figure without understanding that the gap must scale with speed, and they ignore wet roads, poor visibility, and heavy loads, which all lengthen stopping distance.
What to do instead
Learn the two-second rule as a minimum for dry conditions and the doubling to four seconds or more in rain, at night, or behind a large vehicle. Practise the arithmetic: reaction distance plus braking distance equals stopping distance, and stopping distance grows with the square of speed. Answer questions by naming the conditions that require a larger gap.
Skipping or rushing the pre-drive check: answering that a walk-around inspection is optional, or checking only the tyres while ignoring lights, mirrors, fluid levels, and the position of the load.
Candidates who have ridden or driven informally have never had a formal pre-drive routine, and in the exam they treat the question as trivial. They also confuse 'the vehicle started' with 'the vehicle is roadworthy'.
What to do instead
Learn a fixed sequence and apply it to every question: walk around the vehicle for obstacles and children, check tyres and tread, test lights and indicators, adjust mirrors and seat, check fluid levels, and secure the load. In questions, name the specific item being checked rather than saying 'check the car'.
Handling an accident scenario by moving the injured person immediately, leaving the scene to fetch help, or omitting the duty to stop, warn other traffic, and report to the police.
Candidates answer from instinct or from films rather than from a legal and first-aid sequence. They do not know that moving an injured person can worsen spinal injuries and that leaving the scene creates a separate offence.
What to do instead
Learn the order: stop, switch on hazard lights, place a warning triangle, check for danger, call emergency services, give first aid only within your training, exchange details, and report the accident to the police. For each step, be able to say what not to do and why. Practise questions on when moving a casualty is justified, such as immediate fire risk.
Misjudging the correct lane position and mirror-and-signal sequence before a turn, for example signalling after slowing, cutting the corner on a left turn, or changing lanes without a shoulder check.
Candidates learn the manoeuvre as a set of physical actions without the observation sequence, and they underestimate blind spots, especially on the right side in right-hand traffic.
What to do instead
Learn the mirror–signal–manoeuvre order as a fixed chain, and add a shoulder check for the blind spot before any lane change. For turns, learn the correct approach position, the speed reduction before the turn, and the obligation to give way to pedestrians and to oncoming traffic when turning across it.
Treating documentation questions as pure memory of fee amounts and ignoring the consequences: answering that driving without a licence or with an expired licence is a minor matter, or that a vehicle without valid registration and insurance can still be used.
Candidates memorise numbers but not the legal chain, so they cannot reason when a question is phrased as a scenario rather than a definition. They also mix up the licence categories and the documents that must be carried.
What to do instead
Learn the licence categories and what each permits, the documents that must be carried while driving, and the consequences of driving without them, including penalties and insurance invalidity. Build a one-page table linking each document to its purpose and to what happens when it is missing or expired, and answer scenario questions by naming the specific breach.
Answering defensive-driving questions with generic advice such as 'drive carefully' or 'be alert' instead of naming a specific hazard-perception action such as scanning ahead, covering the brake, or creating an escape space.
Candidates have absorbed safety slogans without learning the concrete techniques behind them, so they cannot distinguish a correct answer from a plausible-sounding one.
What to do instead
For each defensive-driving topic, learn one concrete technique and its trigger: scan far ahead and check mirrors every few seconds, cover the brake when a hazard is developing, leave an escape route, and expect the unexpected from children, animals, and motorcycles. When answering, choose the option that names a specific observable action rather than a general attitude.