AF Motorcycle Driving Theory key terms

The legal entitlement of one road user to proceed ahead of another at a junction, crossing, or narrow section. It is given by signs, markings, or rules, and must never be assumed without checking.

A broken or solid line painted across a lane marking where a rider must yield to traffic on the crossing road. You slow or stop there and only pull out when the way is clearly safe.

A solid white line at a junction or signal where a rider must come to a complete halt before proceeding. Stopping past it, or rolling through it, is an offence and blocks sightlines.

A road whose traffic has right of way at its junctions, usually shown by a yellow diamond sign. Riders entering from side roads must yield to vehicles already on it.

The sequence of red, red-and-amber, green, and amber shown by traffic lights. Red-and-amber means prepare but do not move; amber alone means stop unless it is unsafe to do so.

Riding between or past slower or stationary traffic queues, usually at low speed. It is legal in many places but demands care near junctions, lane changes, and opening doors, and is restricted for novice riders in some countries.

Riding a motorcycle directly alongside or between two lanes of moving traffic, sharing the lane space. It is treated differently from filtering and is restricted or banned in many jurisdictions.

The manoeuvre of slowing, choosing a lane, and giving way to traffic already circulating before entering a roundabout. Signal intent on approach and again before leaving, and check mirrors and blind spots.

A pedestrian crossing marked by broad alternating stripes, where pedestrians on the crossing have priority. Riders must approach at a speed that lets them stop and must not overtake vehicles stopped at one.

Painted lines, arrows, hatched areas, and words on the road surface that regulate or guide traffic. Solid lines generally prohibit crossing; broken lines permit it when safe.

The technique of pressing the handlebar in the direction of the intended turn at speed, which makes the bike lean that way. It is how motorcycles above walking pace actually change direction.

The tendency to steer toward whatever you stare at, especially a hazard. Riders must consciously look through a bend or past an obstacle to where they want the bike to go.

The furthest visible point where the two edges of the road appear to meet. Watching how it moves tells you whether a bend is tightening or opening up, so you can set a safe speed.

The path a rider chooses through a bend, ideally wide on entry, tight at the apex, and wide on exit. A good line keeps the bike upright longer and preserves the best view and safety margin.

How far a motorcycle is tilted from vertical while turning. More lean means less tyre grip available for braking or acceleration, so speed must be set before the bike is tipped in.

The grip between tyre and road surface that allows braking, accelerating, and turning. It is reduced by rain, gravel, oil, painted lines, and cold tyres, so inputs must be smoother in poor conditions.

The total distance travelled from recognising a hazard to coming to rest, made up of thinking distance plus braking distance. It rises sharply with speed and on wet or slippery roads.

The gap kept behind the vehicle ahead, commonly at least two seconds in good conditions and more when wet or dark. It gives time to react and a clear view past the vehicle.

The area beside and behind a rider that mirrors do not show. A shoulder check, a brief head turn, is needed before changing lane or position because mirrors alone leave gaps.

A final glance over the shoulder before changing direction or position, made after mirror checks. It catches vehicles, cyclists, or pedestrians hidden in the blind spot and is a core riding habit.

Turning the head briefly to look directly into a blind area before a manoeuvre. On a motorcycle it must be quick so the rider's eyes return to the road ahead promptly.

The range of clutch lever travel where the clutch partially engages and begins to transmit drive. Riders use it for slow-speed control, pulling away smoothly, and preventing stalls.

Smooth, progressive use of the twist grip to manage power delivery. Jerky throttle upsets the chassis, especially mid-corner, and can break traction on slippery surfaces.

Shifting body weight to the outside of a slow, tight turn to balance the bike and keep it stable. It is used in low-speed manoeuvres such as U-turns and tight car park turns.

The brake operated by the right foot, useful for slow-speed control and for settling the bike before corner entry. Overuse alone gives less stopping power than the front brake.

The brake on the front wheel, which provides most of a motorcycle's stopping power as weight transfers forward. It must be applied progressively to avoid locking the wheel.

An electronic system that rapidly releases and reapplies brake pressure to stop wheels locking. It helps riders brake hard on slippery surfaces but does not remove the need to brake smoothly.

The measured depth of grooves in a tyre, which clears water and resists aquaplaning. Legal minimums apply, and worn tyres also reduce grip in dry conditions.

A quick inspection before setting off covering tyres, brakes, lights, fluid levels, chain or belt tension, and mirrors. It catches faults that would be dangerous once moving.

The amount of up-and-down movement in a motorcycle drive chain, set within the manufacturer's range. Too tight strains bearings and too loose risks the chain jumping or breaking.

The safety certification a motorcycle helmet must carry to be legal and protective. A correctly certified, well-fitted helmet is the single most effective protection against fatal head injury.

How snugly a helmet sits without pressure points, with the chin strap fastened so it cannot be pulled off. A loose or unfastened helmet can come off in a crash.

Purpose-made riding gear such as abrasion-resistant jackets, trousers, gloves, and boots. It reduces road rash, cuts, and impact injury compared with ordinary clothing.

How easily a rider is seen by other road users, improved by bright or reflective clothing, a working headlight, and riding where drivers' mirrors and eyes are pointed.

A shorthand for 'sorry mate, I didn't see you', describing the common failure of drivers to notice motorcycles. Riders counter it with conspicuous clothing, positioning, and anticipating sudden pull-outs.

The first part of the rider or bike to strike an object or the ground in a crash. Helmets, gloves, boots, and shoulder and knee armour are placed to protect these points.

A controlled maximum-effort stop using both brakes with weight transferred forward and the bike kept upright. Practice builds the reflex to brake hard without locking a wheel.

Making a scene safe by stopping clear, warning other traffic, switching off engines, and calling emergency services before helping casualties. Protecting the area prevents further collisions.

A first-aid sequence: Danger, Response, Airway, Breathing, Circulation. It guides a rescuer to check safety, see if the casualty responds, and confirm they are breathing before further help.

Placing an unconscious but breathing casualty on their side so the airway stays open and vomit can drain. It is used when no spinal injury is suspected and help is on the way.

Taking off an injured rider's helmet only when essential, such as to clear a blocked airway, and ideally with a second trained person. Unnecessary removal can worsen neck or spine injury.

The amount of alcohol in the blood, expressed as a percentage or per volume. It rises with drinks consumed and body weight, and any legal limit for riders is often lower than for drivers.

The maximum blood or breath alcohol level permitted while riding, set by law. Limits vary between countries and for novice riders, and riding below the limit does not mean riding safely.

Any reduction in the ability to ride safely caused by alcohol, drugs, fatigue, illness, or medication. It slows reactions, narrows attention, and worsens balance, all critical on a motorcycle.

Physical and mental tiredness that degrades concentration, reaction time, and judgement. It is a major cause of single-vehicle motorcycle crashes; the only real remedy is to stop and rest.

A label or leaflet note stating that a medicine may cause drowsiness or affect driving. Riders must read it and avoid riding if their alertness or coordination could be reduced.

Cover that pays for injury or damage the rider causes to other people and their property. It is the minimum cover required by law in most places and does not pay for the rider's own bike.

A document or digital record proving a motorcycle has valid insurance cover. Riders may be required to produce it to police or after a collision.

The official permit authorising a person to ride a motorcycle, often with category, power, and learner restrictions. Riding without the correct licence or outside its conditions is an offence.

Conditions attached to a provisional or learner motorcycle licence, such as power limits, no passengers, or display of L plates. Breaching them can invalidate insurance and the licence itself.

The condition of a motorcycle meeting legal safety requirements for tyres, brakes, lights, steering, and emissions. A machine that fails these standards must not be ridden on public roads.