Belgium Theory D key terms

A signal head where a separate arrow lights up for one direction only. Traffic going that way may proceed, while other directions still obey the main light.

A sign showing a yellow diamond that tells drivers they have right of way at upcoming junctions until a sign cancels it or a different rule applies.

An inverted triangle sign requiring the driver to slow down and let crossing or joining traffic pass before entering the junction or merging into the flow.

The default Belgian rule at junctions with no signs or markings: you must give way to vehicles approaching from your right, slowing or stopping as needed.

At a roundabout marked with yield signs or lines, entering traffic must give way to vehicles already circulating on the ring, unless signs state otherwise.

A solid white line across the lane at a junction or signal. Drivers must stop completely before this line when a stop sign, red light or officer requires it.

A painted zigzag zone at a bus or coach stop where parking and stopping by other vehicles are prohibited so buses can pull in and passengers board safely.

A sign showing a number in a red circle that sets the maximum permitted speed on that road until a cancellation or different limit sign appears.

The general maximum speed inside a built-up area, normally 50 km/h in Belgium, unless signs show a lower or higher posted limit on that specific road.

A device fitted to buses and coaches that caps the vehicle's maximum speed, commonly at 100 km/h, to improve safety and comply with construction requirements.

The licence category that allows driving a bus or coach for passengers, with limits on trailer mass; it requires passing the relevant theory and practical tests.

A card proving the professional driver has completed the required periodic training for passenger transport, kept with the licence and shown on request.

A document confirming the driver meets the health and eyesight standards for professional passenger driving, renewed at intervals set by national rules.

A recording device in the vehicle that logs driving time, other work, availability and rest, and supports enforcement of professional driving and rest rules.

The legal limits on how long a professional driver may drive and the minimum breaks and rest periods required, designed to reduce fatigue-related risk.

The maximum time a professional driver may spend driving in one day, generally nine hours, extendable to ten hours twice a week under the rules.

The mandatory pause after a set period of driving, typically at least 45 minutes after four and a half hours, which may be split into shorter parts.

A state of reduced alertness caused by long driving, poor sleep or irregular hours, which slows reactions and raises the risk of serious crashes.

A driving style that anticipates other road users' mistakes, keeps safety margins and adjusts speed and position to avoid hazards before they become emergencies.

The gap kept behind the vehicle ahead, often measured by the two-second rule and increased in rain, darkness or when carrying passengers.

A smooth, planned driving technique using gentle acceleration, early gear changes and anticipation to cut fuel use and emissions while improving safety.

A system that slows the vehicle without using the foot brake, helping control speed on long descents and reducing brake wear and overheating.

Loss of braking power when brakes overheat from repeated or prolonged use, often on long downhill runs, making the pedal feel weak or ineffective.

The inspection a driver performs before departure, covering tyres, lights, brakes, fluids, doors and emergency equipment, to confirm the bus is safe to use.

Mandatory safety equipment carried on passenger vehicles, checked regularly for charge, seal and expiry, and used in an emergency until help arrives.

A system that prevents the bus from moving while a passenger door is open and may prevent doors opening while the vehicle is in motion.

The routine of stopping close to the kerb, applying the parking brake, opening doors safely and supervising passengers as they board or leave.

The rule that standing passengers may only be carried up to the vehicle's approved capacity and never where standing is unsafe or prohibited by signs.

A plate or sticker showing the maximum number of seated and standing passengers the vehicle may carry, which the driver must never exceed.

Carrying more passengers or weight than the vehicle is approved for, which harms braking, stability and handling and is an offence.

The obligation for drivers and passengers to use fitted seat belts where provided, with the driver responsible for ensuring minors are properly restrained.

The organised removal of passengers from a bus in danger, using marked exits and emergency hammers, keeping calm and moving people clear of traffic.

A small tool mounted near bus windows for breaking the glass to create an escape route when doors cannot be used in an emergency.

Breakdown equipment: a reflective triangle placed behind the vehicle and a high-visibility vest worn before leaving the cab on the road.

Moving the vehicle as far off the carriageway as possible, switching on hazard lights and getting occupants to a safe place behind the barrier.

A stable side-lying position for an unconscious but breathing casualty that keeps the airway open and allows fluids to drain safely.

The European emergency number used to request ambulance, police or fire service, stating location, casualties and hazards clearly and calmly.

The area around a bus that the driver cannot see in the mirrors, especially close alongside and behind, where cyclists and pedestrians may be hidden.

Setting all mirrors before departure so the driver has the widest possible view along both sides and behind the bus, reducing blind spots.

A road user with little physical protection, such as pedestrians, cyclists and motorcyclists, who needs extra care and space from large vehicles.