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Four-wheel drive is a drivetrain system that can send power to all four wheels of a vehicle rather than only the front or rear wheels.

4x4 normally indicates a vehicle with four wheels of which all four can be driven by the powertrain.

The terms 4WD and AWD are sometimes used interchangeably, but manufacturers often use them for different types of system. Traditional 4WD systems commonly provide selectable driving modes, while AWD systems often distribute power automatically.

Yes. Sending power to more wheels can improve traction when accelerating on snow, mud, gravel, sand or other low-grip surfaces.

Not automatically. Braking performance depends primarily on the tyres, road surface, speed, braking system and vehicle condition. Four-wheel drive should not encourage a driver to travel faster on slippery roads.

Yes. The tyres provide the contact between the vehicle and road. Four-wheel drive cannot compensate for tyres that are unsuitable, excessively worn or incorrectly inflated.

Yes. It can improve the ability to move away and climb on snow-covered roads, but safe braking and cornering still depend heavily on tyre grip and appropriate speed.

Some 4x4 vehicles are designed for off-road use, but four-wheel drive alone does not make every vehicle suitable for difficult terrain. Ground clearance, tyres, suspension and the drivetrain design are also important.

This depends on the type of drivetrain. Permanent or automatic systems are designed for normal road use, while some selectable 4WD systems should only be engaged under particular conditions. Follow the manufacturer's instructions.

It can improve traction when towing, but the legally and technically permitted trailer mass is determined by the vehicle's approved towing limits and local regulations, not simply by the presence of four-wheel drive.

A bicycle is a wheeled vehicle primarily propelled by the rider using pedals or hand cranks.

It can be. Electrically assisted bicycles that remain within specified power and assistance-speed limits are commonly treated as bicycles. Faster or more powerful vehicles may be classified differently.

Cyclists should use cycle paths, cycle lanes or the roadway according to the local traffic rules and signs. The required position varies between countries and road types.

This depends on the country and type of cycle facility. Some cycle paths are compulsory, while others are optional.

Yes, when required by local law. Bicycles commonly need a white or yellow light at the front and a red light at the rear during darkness or poor visibility.

Yes. A bicycle used on public roads must have an effective braking system appropriate to its design and local technical requirements.

This varies between countries. Some require helmets for all cyclists or particular age groups, while others recommend helmets without making them compulsory.

Yes, where the bicycle is appropriately equipped and local law permits it. A passenger should use a proper seat and any other required safety equipment.

This depends on local law and the road conditions. Many countries allow two cyclists to ride beside each other in certain circumstances but require single-file riding when necessary for safety or traffic flow.

In many traffic systems, a person who dismounts and walks the bicycle by hand is treated as a pedestrian. The exact legal definition depends on local law.

Motorcyclists should use appropriate protective equipment, commonly including a helmet, gloves, protective jacket and trousers, and footwear that protects the feet and ankles.

Helmet requirements depend on local law, although approved motorcycle helmets are compulsory in many countries. The helmet should fit correctly and be used in a way that preserves its protective function.

Protective clothing can reduce injuries caused by impact, abrasion and contact with the road surface. Purpose-designed motorcycle clothing may also include impact protectors for vulnerable parts of the body.

Gloves help protect the hands and wrists against abrasion, weather and impact and can also improve grip on the motorcycle controls.

Suitable boots provide protection for the feet and ankles and can reduce injuries caused by impact, abrasion or the motorcycle falling onto the rider.

Yes. Passengers are exposed to many of the same risks as riders and should use appropriate protective equipment. Local law may require the passenger to wear the same helmet and clothing as the rider.

A road-legal motorcycle normally requires functioning brakes, tyres, lights, reflectors, mirrors, a horn and other prescribed equipment. Exact technical requirements vary between countries and motorcycle categories.

Yes. Check that the headlight, rear light, brake light and direction indicators work correctly where fitted or required. Motorcycle visibility is especially important because motorcycles can be difficult for other road users to detect.

Yes. Check tyre condition, tread and pressure regularly. Because motorcycles rely on two relatively small tyre contact areas, damaged or incorrectly inflated tyres can significantly affect stability, steering and braking.

A brief check of the tyres, brakes, lights, controls, mirrors and general condition of the motorcycle can help identify problems before riding. Protective equipment should also be correctly fitted and in usable condition.

A track consists of rails that guide trams, trains or other rail vehicles. Tracks may be separated from ordinary traffic or incorporated into a road.

Yes. Tram tracks may be embedded in the carriageway and share part of the road with other traffic, depending on the local road layout and traffic rules.

The applicable priority rules vary between countries, but rail vehicles commonly receive special priority because they cannot leave their tracks. Always obey traffic lights, signs and local rules.

This depends on the road layout and local regulations. Tracks incorporated into an ordinary traffic lane may sometimes be used by other vehicles, while reserved tram tracks or separate railway tracks may not.

You should never stop or park where your vehicle would obstruct a rail vehicle. Local traffic law may specifically prohibit stopping or parking on or close to tracks.

Wheels can slip on wet rails or become trapped in the groove beside a rail. Riders should cross tracks carefully and, where possible, at an angle that reduces the risk of a wheel following the rail groove.

No. Maintain sufficient distance so that you can react safely if the tram stops, passengers enter the roadway or traffic conditions change.

Yes, where crossing is permitted, but pedestrians should carefully check for approaching rail vehicles and obey pedestrian lights and crossing restrictions.

No. Tram tracks can be incorporated directly into a street or carriageway. A railway level crossing is a specific place where a road or path crosses railway tracks, usually with dedicated warning signs or signals.

Do not enter a track crossing unless there is enough space to clear it completely. Never deliberately stop where a tram or train could be blocked.

A caravan is a trailer designed to be towed by another vehicle and used as temporary accommodation while travelling or camping.

Yes. A towable caravan is a type of trailer and is therefore subject to the applicable rules for trailers as well as any specific rules concerning caravans.

Check that the caravan is properly coupled, correctly loaded and secured and that the towing vehicle, trailer and driver comply with the applicable weight, equipment and driving-licence requirements.

A trailer is a vehicle designed to be pulled by another vehicle rather than propelled by its own motor.

Trailers can transport goods, equipment, vehicles, boats or other loads and can also include caravans designed for accommodation.

Check that the trailer is properly coupled, correctly loaded and secured and that the towing vehicle, trailer and driver meet the applicable weight, equipment and licensing requirements.

A tow hitch is a mechanical coupling fitted to a vehicle so that a trailer, caravan or other towable vehicle can be attached.

A tow ball is the ball-shaped part of a common passenger-car towing system onto which the trailer coupling is secured.

No. The vehicle must be approved or technically suitable for the coupling and intended towing load. Some vehicles have limited or no approved towing capacity.

No. You must respect the towing vehicle's approved towing capacity, the hitch rating, trailer limits and the driving-licence rules applying to the combination.

The permitted load depends on the vehicle and coupling. The coupling normally has specified maximum towing and vertical-load ratings that must not be exceeded.

Nose weight is the downward vertical force that a trailer applies to the towing vehicle through the coupling. It must remain within the limits specified for the vehicle, hitch and trailer.

Yes. Tow hitches may be fixed, detachable or retractable. Detachable systems must be correctly installed and securely locked before towing.

Yes, if the hitch and carrier are designed for that purpose. The permitted vertical load and vehicle manufacturer's restrictions must still be respected.

Depending on the trailer's braking system and local law, a safety cable, chain or breakaway system may be required in addition to the main coupling.

Check that the coupling is fully engaged and locked, the safety connection is correctly attached, the electrical connector works and the trailer lights and brakes operate correctly where required.

A fire truck is an emergency vehicle used by firefighters to respond to fires, collisions, rescues and other emergencies. It may carry firefighters, water, ladders and specialised rescue equipment.

This depends on the local traffic laws and emergency signals being used. Fire trucks responding to urgent incidents commonly use flashing warning lights and a siren to indicate that other road users must make way.

Make sufficient space and allow it to pass. Slow down or stop where necessary, but avoid sudden manoeuvres that could endanger other road users or block the emergency vehicle.

Do not create another dangerous situation. Make room in a safe and controlled manner and follow any directions given by police, firefighters or other authorised personnel.

Emergency vehicles may be permitted to pass a red light during an urgent response under special legal conditions. The precise rules and precautions required vary between countries.

Many countries allow emergency vehicles to depart from certain speed restrictions while carrying out an urgent mission. Emergency drivers must nevertheless take appropriate precautions and comply with the applicable emergency-driving rules.

Emergency vehicles may sometimes use emergency lanes, restricted lanes or other parts of the road during urgent missions when local law permits it.

You should not follow closely or use the path created for the fire truck to bypass traffic. Maintain a safe distance and continue to obey the normal traffic rules.

No. Warning lights and sirens are generally used according to the urgency of the mission and local law. A fire-service vehicle travelling on a non-urgent assignment may operate without emergency signals.

Reduce speed and remain alert. Firefighters, hoses, equipment or other emergency personnel may be on or near the roadway, and temporary traffic restrictions may be in place.

A siren is a powerful audible warning device used primarily by emergency or priority vehicles to alert other road users of their approach.

Sirens are commonly used by ambulances, fire engines, police vehicles and other authorised emergency vehicles.

Stay alert, determine where the emergency vehicle is approaching from and make room for it to pass safely according to the traffic rules of the country.

A convoy is an organised group of vehicles travelling together along the same route.

No. An ordinary convoy does not automatically have priority over other traffic. Special rules may apply to military convoys, exceptional transports or officially escorted groups.

Yes. Drivers should maintain sufficient distance from the vehicle ahead so they can react safely and so that other traffic can interact with the convoy where permitted.

Emergency vehicle lighting consists of special warning lights fitted to authorised emergency or priority vehicles to increase their visibility and alert other road users.

Depending on the country, they may be used by police vehicles, ambulances, fire engines, rescue vehicles and other authorised emergency services.

Remain alert, determine where the emergency vehicle is coming from and follow the applicable rules for giving way or creating a safe passage. The precise obligation depends on the country's traffic laws and whether an audible warning is also being used.

Agricultural machinery includes vehicles and machines designed to perform farming operations such as cultivating, planting, harvesting, mowing or transporting agricultural materials.

Examples include tractors, combine harvesters, self-propelled sprayers, forage harvesters, mowing machines and agricultural trailers.

No. Some agricultural machines are self-propelled vehicles, while others are implements or equipment that must be attached to or towed by another vehicle. Their legal classification depends on their construction and use.

Yes, when legally permitted and suitably equipped. Registration, insurance, lighting, dimensions, speed and driving-licence requirements may apply.

This depends on the country and type of machine. Some countries have a dedicated agricultural-vehicle licence, while other vehicles fall under ordinary car or heavy-vehicle licence categories.

They may. The permitted speed can depend on the machine's construction speed, mass, tyres and road type. Many agricultural machines are designed to travel considerably more slowly than ordinary road vehicles.

Agricultural vehicles are frequently prohibited from motorways or other high-speed roads. The exact restrictions depend on local traffic law.

Agricultural machinery can be slow, wide or unusually long and may turn into fields or farm entrances. Drivers should reduce speed where necessary and overtake only with sufficient visibility and space.

Yes. Some machinery exceeds normal road dimensions. Folding equipment, special markings, permits or other restrictions may apply before it can travel on public roads.

Yes, when designed and approved to do so. Tractors commonly tow agricultural trailers and implements, subject to applicable mass, braking, coupling and dimensional requirements.

An electric bicycle is a bicycle equipped with an electric motor that provides assistance to the rider.

Pedal assistance means that the electric motor provides power while the rider pedals. The assistance normally decreases or stops when a specified speed is reached.

It can be. Electric bicycles that remain within the applicable motor-power and assistance-speed limits are commonly treated as bicycles. Faster or more powerful models may belong to another vehicle category.

The permitted assistance speed depends on the vehicle category and local law. Ordinary pedal-assisted bicycles commonly stop providing motor assistance at approximately 25 km/h.

Yes, by your own effort where otherwise permitted. The assistance limit normally determines when the motor stops helping; it does not necessarily prevent the bicycle itself from travelling faster downhill or through pedalling.

This depends on its legal classification. Ordinary low-power pedal-assisted bicycles commonly require no driving licence, while faster electric bicycles may require a moped or another licence.

Ordinary pedal-assisted bicycles generally do not require registration, but high-speed electric bicycles may require registration and a licence plate.

Helmet requirements depend on the country and vehicle category. Ordinary e-bikes may follow normal bicycle helmet rules, while faster electric bicycles can have specific compulsory helmet requirements.

Ordinary electric bicycles generally follow the same cycle-path rules as conventional bicycles. Different rules can apply to faster or more powerful electric bicycles.

This depends on the vehicle's technical characteristics and local law. Ordinary pedal-assisted bicycles commonly do not require motor-vehicle insurance, while vehicles capable of greater independent motor propulsion may be subject to insurance requirements.

Usually yes. Most electric bicycles can still be pedalled like conventional bicycles when the motor is switched off or the battery is depleted, although their additional weight may make pedalling harder.

Yes, when the bicycle is designed and legally equipped for them. Passenger seats, cargo areas, child restraints and trailers must satisfy the applicable safety and traffic rules.

An electric vehicle is a vehicle that uses one or more electric motors for propulsion and stores electrical energy in a rechargeable battery or another electrical energy-storage system.

A fully electric or battery-electric vehicle uses only electric motors for propulsion and obtains its driving energy from rechargeable electrical energy storage rather than a combustion engine.

A plug-in hybrid uses both electric propulsion and another power source, normally a combustion engine, and its battery can be charged from an external electricity supply. It is therefore different from a fully electric vehicle.

An electric vehicle is connected to a suitable charging point that supplies electrical energy to its rechargeable battery. Charging power and connector types vary between vehicles and charging stations.

No. Charging speed depends on the vehicle, battery, charger, electrical supply, temperature and current battery condition.

A fully electric vehicle produces no combustion-engine exhaust emissions while driving. It can still contribute to non-exhaust emissions through tyres, brakes and road wear.

Not necessarily. Charging spaces can have specific conditions requiring the vehicle to be connected, actively charging, within a time limit or otherwise complying with local parking rules.

Normally no. A car remains subject to the rules for cars, a motorcycle to those for motorcycles and so on. Electric propulsion does not generally change ordinary priority, speed or lane rules.

Where an electric vehicle belongs to a vehicle category that normally requires registration and insurance, those requirements continue to apply.

Fully electric vehicles are commonly permitted in low-emission zones because they have no combustion-engine exhaust emissions, but access rules are determined locally.

Yes, when their vehicle category satisfies the normal motorway-access requirements. Electric propulsion by itself neither grants nor prevents motorway access.

No. Electric bicycles belong to separate pedal-cycle categories and are subject to their own power, assistance-speed and traffic rules.

A pedelec is an electrically assisted bicycle whose motor provides assistance while the rider pedals.

Pedal assistance means that the electric motor provides additional power when the rider uses the pedals. The assistance stops according to the speed and operating limits applying to the bicycle.

A pedelec is a type of electric bicycle. The term specifically emphasises that the motor assists the rider while pedalling rather than functioning primarily as an independent means of propulsion.

No. A speed pedelec can provide assistance at considerably higher speeds and is commonly subject to additional requirements concerning helmets, licences, registration or road use.

Yes. With an ordinary pedelec, the motor is intended to assist the rider's pedalling rather than propel the bicycle independently during normal riding.

Yes, by your own effort where otherwise permitted. The assistance limit determines when the motor stops helping; it does not normally prevent the bicycle itself from travelling faster through pedalling or downhill.

Ordinary low-power pedelecs are generally treated as bicycles in jurisdictions that recognise the category and therefore commonly require no driving licence. Local rules should always be checked.

Ordinary pedelecs commonly require no registration plate when they remain legally classified as bicycles. Faster electric cycles may have different requirements.

When legally classified as a bicycle, a pedelec normally follows the same cycle-path rules as conventional bicycles.

This depends on local bicycle law. Some countries require helmets for particular riders or circumstances, while others recommend them without making them compulsory.

Yes, where the bicycle is designed and legally equipped to carry them. Appropriate seating, foot protection or child-restraint requirements may apply.

It may be classified as a motorised cycle, speed pedelec, moped or another vehicle category, resulting in different technical and traffic requirements.

A quadricycle is a four-wheeled motor vehicle belonging to a specialised vehicle category distinct from an ordinary passenger car.

A light quadricycle is a relatively low-powered four-wheel motor vehicle with a restricted maximum design speed. In European vehicle classification, light quadricycles belong to category L6e.

A heavier or more powerful quadricycle that does not qualify as a light quadricycle can fall within category L7e under European vehicle-classification rules.

No. Although some enclosed quadricycles resemble very small cars, they belong to a different technical and legal vehicle category and can have different licence, power, mass and road-access rules.

Not necessarily. The quadricycle category includes several types of four-wheel motor vehicles. Some are open recreational quads, while others are enclosed road-going microcars designed for passengers or goods.

Yes. Quadricycles can use electric motors, combustion engines or other approved propulsion systems.

Usually yes, but the required licence depends on whether the vehicle is classified as a light or heavier quadricycle and on the country's licensing system.

Road-going quadricycles commonly require registration and a registration plate. Exact requirements vary between countries.

This depends on the vehicle design and local law. Open quadricycles may require helmets, while enclosed vehicles with a passenger compartment and restraint systems can be subject to seat-belt rules instead.

Yes, when it is designed and approved to do so. The number of passengers may not exceed the vehicle's approved seating capacity.

This depends on its vehicle category, construction speed and local motorway-access rules. Low-speed light quadricycles are normally unsuitable for motorway traffic.

This depends on its legal classification. Some light quadricycles are treated similarly to mopeds, while heavier quadricycles may follow many of the ordinary rules applying to cars.

A microcar is a very small enclosed motor vehicle generally intended for short journeys and urban transport.

Not necessarily. Many microcars are legally classified as light or heavy quadricycles rather than passenger cars and can therefore have different licence, speed and road-access rules.

Many microcars are light quadricycles, but the terms are not identical. Microcar describes the general vehicle design, while light quadricycle is a specific legal vehicle category.

Yes. Microcars may use electric motors, combustion engines or other approved propulsion systems.

This depends on its legal category and construction. Light quadricycles commonly have a substantially lower maximum design speed than ordinary passenger cars.

Usually yes. The required licence depends on whether the vehicle is classified as a light quadricycle, heavier quadricycle or ordinary passenger car.

Some countries allow light quadricycles to be driven at a younger age than ordinary cars, subject to the appropriate licence. Minimum ages vary between countries.

Road-going microcars generally require registration and a registration plate according to their vehicle category.

Normally yes. Motor vehicles used on public roads are generally subject to the motor-liability insurance requirements of the country in which they are registered or used.

This depends on the vehicle construction and local law. Enclosed quadricycles equipped with seat belts may be treated differently from open quadricycles, where helmet requirements are more common.

Low-speed microcars classified as light quadricycles are commonly prohibited from motorways. Faster vehicles may have different access rights according to their classification and construction speed.

A microcar belongs to a different vehicle category and may be subject to different construction and type-approval requirements from an ordinary passenger car. Drivers should not assume that the two vehicle types provide identical levels of crash protection.

An all-terrain vehicle is a motor vehicle designed to travel over rough or uneven terrain, commonly using four wheels and wide tyres.

It depends on the country and vehicle. An ATV may need to meet specific registration, equipment, insurance and licensing requirements before it can legally use public roads.

Not necessarily. The term can cover different types of off-road vehicles, although four-wheeled quads are among the most common forms.

A van is an enclosed motor vehicle commonly designed to transport goods, equipment or passengers.

No. Many vans are designed primarily for goods transport, while others are configured mainly or partly for carrying passengers.

Not necessarily. Rules can depend on the van's maximum authorised mass, vehicle category, use and number of passenger seats.

A recreational vehicle is a vehicle designed or adapted for travelling and temporary living accommodation.

The term commonly includes motorhomes and campervans and may also be used more broadly for caravans and camping trailers.

Not always. The applicable rules can depend on the vehicle's classification, weight, dimensions and whether it is self-propelled or towed.

A scooter is a two-wheeled motor vehicle with a characteristic step-through design that may be powered by a combustion engine or electric motor.

It can be either. The legal classification depends on characteristics such as the scooter's maximum design speed, power and engine capacity.

No. Different rules may apply according to whether the scooter is legally classified as a moped, motorcycle or another vehicle category.

A Trikke is a three-wheeled standing personal-mobility vehicle that is steered with handlebars and by leaning or shifting the rider's body.

Yes. Trikke-type vehicles can be human-powered or electrically powered, depending on the model.

The applicable rules depend on the vehicle's propulsion, maximum design speed and legal classification. A human-powered and an electric Trikke may therefore be treated differently.

A personal transporter is a compact device designed to transport an individual, commonly over relatively short distances.

Examples can include electric scooters, kick scooters, skateboards, self-balancing devices, monowheels and certain mobility devices.

Yes, commonly. Electric scooters are one of the most widespread forms of motorised personal transporter, although their precise legal classification varies between countries.

No. A bicycle is primarily propelled through pedals or hand cranks. Personal transporters can use other methods of propulsion and may belong to a separate legal category.

Not necessarily. Low-speed personal mobility devices are often classified separately from mopeds. Devices exceeding specified speed or construction limits may fall into another vehicle category.

This depends on the country and type of device. Motorised personal transporters are often permitted or required to use cycle infrastructure where available.

This depends on local law. Motorised devices may be prohibited from ordinary pavements, while people using non-motorised devices at walking speed may sometimes be treated as pedestrians.

Some countries impose a minimum riding age for electric scooters and similar motorised devices. The applicable age and exceptions vary between jurisdictions.

Only when the device is specifically designed and legally permitted to carry passengers. Most ordinary electric scooters are designed for one person only.

Motorised devices may be subject to requirements concerning lights, reflectors, brakes and audible warning devices. The required equipment depends on local traffic and technical regulations.

This varies between countries and device categories. Even where a helmet is not legally compulsory, wearing an appropriate helmet can provide additional protection in a fall or collision.

A modification that increases the vehicle beyond the legal speed or technical limits may change its classification or make it illegal for use on public roads.

A skateboard is a board fitted with wheels that is ridden while standing and normally propelled by pushing against the ground or by gravity.

Yes. In addition to recreational and sporting use, skateboards can be used for short-distance personal travel where local traffic rules permit.

This depends on the country and the user's speed. Skateboard users may be treated similarly to pedestrians or cyclists under some traffic-law systems.

A Segway is a self-balancing electric personal transporter designed to carry a standing rider.

A Segway uses an electronic self-balancing system that continuously responds to the rider's movements and helps keep the vehicle upright.

This depends on local traffic laws. Segways may be classified as personal mobility devices, bicycles or another vehicle category, which determines whether they may use cycle paths, roads or other areas.