BiH Theory A common mistakes
BiH Theory A · Understand the traps and how to avoid them.
Reading a sign's shape and colour but answering from memory of what that sign 'usually' means, instead of what the specific sign shown requires (e.g. treating a blue square as a mandatory instruction when it is informational).
Candidates learn sign families as a list of pictures rather than as a system of shape-colour-meaning rules, so under time pressure they pattern-match to the most familiar example.
What to do instead
Study the classification rules first: triangles warn, circles with red rings prohibit, blue circles instruct, blue squares inform, rectangles with black borders on white give directions. Then drill mixed sets where similar-looking signs appear together and justify each answer by naming shape, colour and symbol before choosing.
Approaching an intersection and answering right-of-way questions by 'who arrives first' rather than by priority rules, missing that a vehicle from the right has priority on an unmarked crossing or that a tram has priority over other vehicles.
Everyday driving habits and courtesy intuitions override the formal hierarchy of priority, and candidates never memorise the ordered list of who yields to whom.
What to do instead
Memorise the priority hierarchy explicitly: police officer, then traffic lights, then signs, then the right-hand rule. Practise scenario questions where two or three of these conflict, and state aloud which level of the hierarchy decides before answering.
Choosing the posted speed limit for the road type while ignoring the modifier that actually applies, such as a lower limit for a vehicle carrying a trailer, a newly qualified driver, or a wet road.
Candidates learn the general limits table but not the exceptions attached to vehicle category, licence age, or conditions, so the general number feels 'correct enough'.
What to do instead
Build a one-page matrix of limits: rows for road type, columns for vehicle category and condition, plus separate notes for novice-driver and trailer restrictions. Test yourself by covering cells and reciting them, then answer questions by identifying vehicle and condition first, road type second.
Answering hazard-perception and following-distance questions with a fixed number (such as 'always keep two seconds') instead of adjusting for speed, surface, visibility and load.
Rule-of-thumb numbers are easy to memorise and give false confidence; candidates do not connect the rule to the conditions described in the scenario.
What to do instead
Learn the two-second rule as a baseline and the multipliers for rain, night, towing and gravel. For each practice scenario, write down the baseline, the modifier, and the resulting gap before selecting an answer. Also practise reading the scenario for the condition keywords that trigger a modifier.
Treating a situation as safe because no rule is broken, e.g. answering that overtaking is fine because it is not prohibited, while ignoring limited sight distance, a crest, or a pedestrian about to step out.
Candidates equate legality with safety and answer the letter of the regulation rather than the defensive-driving judgement the question is testing.
What to do instead
For every 'is this allowed' question, add a second check: what can I not see, and what would I do if the hidden hazard appears? Practise by naming the specific unseen risk in each scenario before choosing the answer.
Confusing warning-light meanings and responses, for example continuing to drive with the oil-pressure or brake-system warning illuminated, or treating the tyre-pressure light as informational only.
Dashboard symbols are visually similar and candidates learn them as pictures without linking each to the required driver action.
What to do instead
Group warning lights by required response: stop immediately (oil pressure, brake system, coolant temperature), stop when safe and check (tyre pressure, ABS), inform and monitor (engine management, glow plug). Learn each symbol with its colour and its action, and rehearse the three groups until the action comes before the symbol name.
Giving first-aid answers that prioritise the wrong action, such as moving an injured motorcyclist out of the road, giving an unconscious casualty something to drink, or starting chest compressions on a breathing casualty.
Instincts about tidying the scene and 'doing something' conflict with the actual priority order of danger, response, airway, breathing, circulation, and candidates have not rehearsed the sequence.
What to do instead
Memorise and rehearse the ordered sequence: secure the scene and call emergency services with location and casualty count, then airway, breathing, circulation. Learn the explicit do-nots (do not move a suspected spinal injury unless there is immediate danger, do not give fluids to an unconscious person) and practise full scenarios end to end rather than isolated facts.
Mixing up penalty ranges and licence consequences, for example confusing the sanction for exceeding the limit by a small margin with the sanction for a large margin, or not knowing when penalty points lead to a driving ban.
Penalties are learned as scattered numbers without a structure, and questions deliberately place similar values side by side.
What to do instead
Build a table of offences with columns for fine range, penalty points, and licence consequence, and learn the thresholds that trigger escalation. Anchor each number to its threshold rather than memorising it in isolation, and review the table weekly with self-testing rather than re-reading.
Answering eco-driving questions by picking the option that sounds most environmentally friendly rather than the one that is technically correct, such as claiming the engine should always be switched off in traffic or that higher gears are always better regardless of load and gradient.
Moral framing replaces technical understanding, and candidates have not learned how engine load, rev range and cold starts actually affect consumption and emissions.
What to do instead
Learn the mechanisms: cold engines run rich, sustained idling wastes fuel, optimal efficiency sits in a mid rev band under moderate load, and unnecessary weight and roof racks raise consumption. Answer by reasoning from the mechanism, and be alert to 'always' and 'never' options that overstate a valid principle.
Applying car rules to other categories, e.g. using car following distances, speed limits or licence requirements for a heavy goods vehicle, bus or motorcycle, or misjudging which licence category covers a given combination.
Most practice happens in the car category, so category-specific rules are under-learned and candidates assume the general rule transfers.
What to do instead
For each vehicle category, write out the differences that matter: mass and dimension limits, speed limits, required licence category and any age or experience conditions, and specific loading or passenger rules. Answer category questions by first naming the category and reciting its distinguishing rules before comparing options.