BiH Theory C common mistakes
BiH Theory C · Understand the traps and how to avoid them.
Stopping at a stop sign only briefly or after the line, and treating a yield sign as a full stop, so the vehicle's final position and priority behaviour are wrong.
Candidates memorise sign shapes but never practise the physical sequence of stopping fully behind the line, checking both directions and only then moving off, so under test pressure they roll through.
What to do instead
Rehearse the stop routine as a fixed script: full stop with the front bumper behind the line, two-way observation, then move. For yield signs, drill the decision rule: stop only if traffic requires it, but always be prepared to stop.
Misreading priority at unmarked intersections and roundabouts, entering when the rule says give way, or hesitating and stopping when they actually have priority.
Priority rules are learned as abstract lists rather than applied to concrete layouts, and candidates confuse right-hand priority with signed priority when a sign is partially obscured or absent.
What to do instead
Work through intersection diagrams one by one, stating aloud who has priority and why, including the right-hand rule, roundabout give-way and priority-road signs. Practise naming the rule before acting at every junction.
Confusing vehicle categories and their licence, mass and speed conditions, for example mixing up what a category B licence covers when towing a trailer or misjudging the maximum authorised mass of a combination.
Category definitions are studied as tables without linking them to real vehicle documents, so the numbers stay abstract and get swapped under exam pressure.
What to do instead
Build a personal comparison sheet linking each category to a concrete example vehicle, its maximum mass and permitted trailer load, and test yourself by classifying real vehicles seen on the road.
Loading a vehicle so that the permitted axle or total mass is exceeded or the load is distributed unevenly, and failing to secure it against shifting.
Candidates estimate loads by eye and ignore the difference between payload, total mass and axle loads, and they underestimate how much a shifting load changes handling and braking.
What to do instead
Practise calculating total and axle loads from vehicle documents plus actual weights, and apply a fixed securing checklist: distribute low and centred, lash down, recheck after the first few kilometres.
Braking late and hard into a bend, or braking while already cornering, instead of adjusting speed before the curve and accelerating gently through it.
In normal driving the candidate follows traffic rhythm rather than reading the road ahead, so speed is set too late and the bend is used to correct it.
What to do instead
Train the sequence: observe the curve, reduce speed before entry, hold a steady line, then apply gentle power on exit. Repeat the same curve at correct speed until the timing becomes automatic.
Following too closely and leaving no escape space, especially in rain or on wet roads, and failing to adjust speed and distance to visibility and surface conditions.
Candidates copy the gap of the car ahead and treat the two-second rule as a formality rather than a calculation that must grow with speed and poor grip.
What to do instead
Count the time gap aloud at fixed roadside markers in dry and wet conditions, doubling it in rain, and consciously identify an escape route or shoulder before it is needed.
Skipping the safety check before approaching a casualty, moving an injured person unnecessarily, or giving food and drink to a conscious casualty.
Candidates focus on the injury and rush to help, forgetting that scene safety and avoiding further harm come first, and they confuse comforting a casualty with giving them drink.
What to do instead
Memorise the fixed order: secure the scene and warn traffic, check responsiveness and breathing, call emergency services, then treat. Drill the rule that an injured person is not moved unless there is immediate danger.
Performing the daily or pre-departure check superficially, for example glancing at tyres without checking pressure and tread depth, or ignoring warning lights and fluid levels.
The check is treated as a ritual to get through rather than a measurement task, and candidates do not know the actual limits for tread depth, pressure or fluid levels.
What to do instead
Use a written checklist with measurable thresholds: tread depth, cold tyre pressure against the plate value, oil and coolant levels, lights, brakes and warning lamps, signed off each time until it becomes routine.
Leaving the engine idling for long periods, using harsh acceleration and late braking, and carrying unnecessary loads or roof racks, all of which raise fuel use and emissions.
Candidates drive by habit and feel rather than by anticipation, and they do not connect idling, aggressive pedal use and extra weight to measurable consumption.
What to do instead
Practise anticipatory driving: lift off early, use engine braking, switch off during longer stops, remove unnecessary weight and roof equipment, and compare consumption figures before and after to make the effect visible.
Misjudging the vehicle's dimensions and blind spots when reversing, parking or changing lanes, relying only on mirrors and forgetting the blind spot over the shoulder.
Candidates learn manoeuvres on one vehicle and do not recalibrate to the size and mirror layout of the test vehicle, and they trust mirrors as complete coverage.
What to do instead
Before driving, set mirrors and identify the blind spots on that specific vehicle, then practise reversing and lane changes with a shoulder check every time until it is automatic.