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QuizTraffic rulesJapan

This interesting quiz helps you test your knowledge in a clear and visual way. With easy multiple-choice questions, you can quickly build confidence and learn new facts while keeping it simple, interactive, and fun.

Traffic signs
Traffic rules
Japan
True/false 17 Japan 22 Car controls 109 Dashboard lights 40 Priority rules 9 Pedestrians 19 Cyclists 20 Show all 589
Why is high-visibility clothing useful during a roadside breakdown?

1. Why is high-visibility clothing useful during a roadside breakdown?

It makes hazard warning lights unnecessary.
It protects you from injury if a vehicle hits you.
It gives you priority when walking beside the road.
✓ It makes you easier for approaching drivers and recovery workers to see.

High-visibility clothing improves your visibility, especially at night or in poor weather, but you must still remain away from traffic.

High-visibility clothing worn during a roadside breakdown
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you avoid using an ordinary extension lead to charge an electric vehicle?

2. Why should you avoid using an ordinary extension lead to charge an electric vehicle?

✓ It may overheat because it is not designed for continuous high-power charging.
It prevents the vehicle from locking while charging.
It will always charge the vehicle too quickly.
It prevents the charging port from closing afterwards.

An ordinary household extension lead may not be designed for the sustained electrical load required for EV charging and can overheat. Use suitable approved charging equipment and follow the vehicle and charging-equipment manufacturer's instructions.

Extension lead used for electric-vehicle charging
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does this dashboard symbol indicate?

3. What does this dashboard symbol indicate?

Oil-pressure warning.
Engine-temperature warning.
✓ Engine-management warning.
Charging-system warning.

This symbol indicates a fault detected by the engine-management or emissions-control system. If it remains illuminated while driving, the vehicle should be checked according to the manufacturer's instructions.

Engine-management warning symbol on the dashboard
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do before attempting to jump-start a vehicle?

4. What should you do before attempting to jump-start a vehicle?

Connect the leads without checking their polarity.
✓ Check the owner's manual and make sure the connections are compatible.
Use any battery that physically fits the vehicle.
Ignore battery damage if the terminals look clean.

Incorrect jump-starting can damage electrical systems, cause sparks, or make a battery explode. Connect the leads in the correct order before starting the vehicles, and follow the manufacturer's procedure exactly.

Preparing to jump-start a vehicle battery
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do when driving on icy roads?

5. What should you do when driving on icy roads?

Brake firmly before bends to reduce speed.
Follow the vehicle ahead more closely for guidance.
✓ Drive slowly and avoid sudden braking, steering, or acceleration.
Maintain normal speed if the road appears clear.

Ice greatly reduces tyre grip. Drive gently, keep extra distance, and avoid sudden movements that could cause a skid.

Vehicle travelling on an icy road
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why does higher speed increase the risk of aquaplaning?

6. Why does higher speed increase the risk of aquaplaning?

Higher speed increases the tyre pressure.
The vehicle becomes heavier as speed increases.
✓ The tyres have less time to clear water from the road surface.
The suspension becomes less effective at high speed.

At higher speeds, the tyres may not disperse water effectively, making it easier for the vehicle to lose contact with the road.

Vehicle speed and aquaplaning on a wet road
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you reduce speed in residential areas?

7. Why should you reduce speed in residential areas?

Overtaking is prohibited throughout residential areas.
Traffic from side roads must always give way.
Parked vehicles have priority over moving traffic.
✓ Pedestrians, cyclists, and children may be nearby.

Residential areas often have pedestrians, cyclists, parked vehicles, driveways, and children, and hazards may appear suddenly. Lower speed gives you more time to react and stop safely.

Vehicle travelling through a residential street
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if you realise you have put the wrong fuel in your vehicle?

8. What should you do if you realise you have put the wrong fuel in your vehicle?

Add the correct fuel and continue driving.
Rev the engine briefly to mix the fuels.
Drive until the fuel warning light comes on.
✓ Do not start the engine, and seek assistance.

If you have used the wrong fuel, do not start the engine. Starting it can circulate the incorrect fuel and cause further damage. If possible, avoid switching on the ignition and seek appropriate roadside or workshop assistance.

Fuel nozzle and the risk of misfuelling
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do before entering a roundabout?

9. What should you do before entering a roundabout?

Enter without giving way if you are going straight ahead.
Maintain your speed unless another vehicle blocks your path.
Enter first if you reach the roundabout before other traffic.
✓ Slow down and give way when required.

Before entering a roundabout, reduce your speed, observe traffic, and give way according to the local rules.

Vehicle approaching a roundabout
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What can uneven tyre wear indicate?

10. What can uneven tyre wear indicate?

The tyres are correctly inflated.
✓ Incorrect pressure, poor alignment, or a suspension or braking problem.
The vehicle has been driven mainly at low speeds.
The tyres have reached normal operating temperature.

Uneven wear may result from incorrect tyre pressure, wheel misalignment, worn suspension parts, or a brake that is not releasing properly.

Uneven wear across a vehicle tyre
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
You should signal before turning or changing lanes.

11. You should signal before turning or changing lanes.

✓ True.
False.

A clear signal helps other road users understand your intentions, but you must still check that the manoeuvre can be made safely.

Vehicle signalling before a turn
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does this dashboard symbol indicate?

12. What does this dashboard symbol indicate?

Lane-departure warning.
✓ Forward-collision warning.
Electronic stability control.
Adaptive cruise control.

This symbol relates to the forward-collision warning or automatic emergency braking system. It may warn the driver when the vehicle detects a risk of collision with traffic ahead.

Forward-collision warning symbol on the dashboard
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
You should keep both hands ready to control the steering.

13. You should keep both hands ready to control the steering.

False.
✓ True.

Keeping proper control of the steering wheel helps you react safely to changes in traffic and road conditions.

Driver keeping both hands on the steering wheel
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should hard braking be avoided while a motorcycle is leaning in a bend?

14. Why should hard braking be avoided while a motorcycle is leaning in a bend?

It makes the motorcycle turn more sharply.
It increases tyre pressure immediately.
It prevents the suspension from working.
✓ It can reduce stability and available tyre grip.

When a motorcycle is leaning, the tyres are already using grip to turn. Hard braking can demand additional grip and may reduce stability. Whenever possible, adjust speed before the bend and use smooth, controlled inputs while cornering.

Motorcycle leaning while travelling through a bend
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does this dashboard symbol indicate?

15. What does this dashboard symbol indicate?

Brake-pad wear warning.
✓ Brake-system warning.
Parking brake applied.
Anti-lock braking system warning.

This symbol indicates a possible brake-system fault. If it remains illuminated after the parking brake is released, stop safely and have the braking system checked.

Brake-system warning symbol on the dashboard
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do with a helmet that has taken a significant impact in a collision?

16. What should you do with a helmet that has taken a significant impact in a collision?

Keep using it if the visor or straps still work.
Keep using it if there are no visible cracks.
✓ Stop using it and follow the manufacturer's replacement guidance.
Replace only the outer shell if it is scratched.

A helmet can be damaged internally by a significant impact even when no damage is visible from the outside. Stop using the helmet and follow the manufacturer's guidance, which will commonly require replacement after a significant impact.

Helmet inspection after a significant impact
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
It is safer to drive faster than the speed limit when overtaking.

17. It is safer to drive faster than the speed limit when overtaking.

✓ False.
True.

You must still drive safely and obey traffic laws. Speeding increases risk and is not automatically justified by overtaking.

Vehicle overtaking another road user
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should a child use a suitable child restraint?

18. Why should a child use a suitable child restraint?

To allow the child to sit closer to the window.
To prevent the vehicle from braking suddenly.
✓ To reduce the risk of serious injury in a collision.
To make the seat belt more comfortable.

A suitable child restraint is designed to protect a child according to their size and development. It helps position and restrain the child correctly, reducing the risk of serious injury in a collision or sudden stop.

Child secured in a suitable car seat
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Which pedal is used to slow down or stop the vehicle?

19. Which pedal is used to slow down or stop the vehicle?

The accelerator pedal.
The footrest.
The clutch pedal.
✓ The brake pedal.

The brake pedal is used to reduce the vehicle's speed or bring it to a stop. In a manual vehicle, it is the middle pedal.

Brake pedal in the driver's footwell
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why can main-beam headlights make driving in fog more difficult?

20. Why can main-beam headlights make driving in fog more difficult?

Main beam reduces the effectiveness of the fog lights.
The stronger beam uses too much electrical power.
Main beam makes interior lights less effective.
✓ The light can reflect off fog droplets and reduce visibility.

Main beam can reflect back from fog and create glare, making it harder to see the road ahead.

Headlight glare reflected by fog
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you expect when leaving a tunnel in bright sunlight?

21. What should you expect when leaving a tunnel in bright sunlight?

The speed limit automatically increasing.
The road surface becoming more slippery.
The brakes becoming more powerful.
✓ Temporary glare and reduced visibility.

Your eyes may need time to adjust from the darker tunnel to bright daylight. Reduce speed if necessary and remain alert.

Bright sunlight at the exit of a road tunnel
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why are tyre condition and pressure especially important on a motorcycle?

22. Why are tyre condition and pressure especially important on a motorcycle?

They determine how brightly the lights work.
They affect only comfort at high speed.
They matter only when carrying a passenger.
✓ They directly affect grip, stability, and braking.

A motorcycle relies on a relatively small area of tyre contact with the road. Correct tyre pressure, tread and condition are important for grip, steering, stability and braking. Check the tyres regularly and follow the manufacturer's recommended pressures.

Checking the condition of a motorcycle tyre
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do when approaching a hill crest?

23. What should you do when approaching a hill crest?

Maintain speed if no traffic is visible.
✓ Slow down and be prepared for hidden hazards.
Move toward the centre of the road for a better view.
Follow the vehicle ahead closely for guidance.

A hill crest can hide vehicles, cyclists, pedestrians, or obstacles. Reduce speed and stay in your lane.

Vehicle approaching the crest of a hill
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if another vehicle is tailgating you?

24. What should you do if another vehicle is tailgating you?

Reduce the gap ahead so they cannot move into it.
Tap the brakes to make them increase their distance.
✓ Stay calm and increase your safety margin ahead.
Move toward the centre to discourage them from passing.

If someone follows too closely, avoid sudden actions. Keeping more space in front gives you more time to brake gently if needed. If it is safe, allow the tailgating vehicle to pass.

Following vehicle visible close behind
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if the windscreen wipers stop working during heavy rain?

25. What should you do if the windscreen wipers stop working during heavy rain?

Follow another vehicle closely so you can see its lights.
✓ Reduce speed and stop in a safe place as soon as possible.
Continue slowly using the hazard lights.
Open a side window and continue driving carefully.

Do not continue when you cannot see clearly. Slow down smoothly and stop somewhere protected from traffic.

Windscreen wipers failing during heavy rain
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Where should the top of the head restraint normally be positioned?

26. Where should the top of the head restraint normally be positioned?

Level with the shoulders.
As low as possible.
✓ Approximately level with the top of the head.
Behind the neck only.

The head restraint should normally be adjusted so that its top is approximately level with the top of the head. This helps reduce the risk of neck injury in a collision.

Adjusting the head restraint to head height
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does this vehicle-control symbol indicate?

27. What does this vehicle-control symbol indicate?

✓ Electric window control.
Window lock.
Central door locking.
Mirror adjustment.

This control operates the vehicle's electric windows. Pressing or pulling the switch lowers or raises the corresponding window.

Switch for operating an electric window
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do around a damaged electric or hybrid vehicle?

28. What should you do around a damaged electric or hybrid vehicle?

Disconnect exposed electrical components yourself.
Assume the system is safe once the vehicle is switched off.
Move damaged high-voltage parts away from the road.
✓ Keep clear of damaged high-voltage components and call trained assistance.

Electric and hybrid vehicles can contain dangerous high-voltage systems. Do not touch damaged cables, batteries, or electrical components.

Damaged electric vehicle and high-voltage safety risks
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why can mixing alcohol with medicine be dangerous for drivers?

29. Why can mixing alcohol with medicine be dangerous for drivers?

✓ The combination may increase drowsiness or impairment.
Medicine can cancel out the effects of alcohol.
Alcohol leaves the body faster when taking medicine.
Medicine prevents alcohol from causing drowsiness.

Some prescription and non-prescription medicines can intensify alcohol-related drowsiness, dizziness, poor coordination, or reduced concentration.

Alcohol and medicine as a driving-impairment risk
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
You do not need to look for cyclists when opening your car door.

30. You do not need to look for cyclists when opening your car door.

✓ False.
True.

You should always check for cyclists, motorcyclists, and other road users before opening a door.

Cyclist near the door of a parked car
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you avoid keeping the clutch pedal pressed while driving?

31. Why should you avoid keeping the clutch pedal pressed while driving?

It increases tyre pressure.
It locks the steering.
It applies the parking brake.
✓ It reduces engine braking and vehicle control.

Keeping the clutch pedal pressed while the vehicle is moving disconnects the engine from the transmission. This reduces engine braking and can reduce your control of the vehicle.

Clutch held down while a vehicle is moving
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does this vehicle-control symbol indicate?

32. What does this vehicle-control symbol indicate?

Headlight level adjustment.
Interior lighting.
✓ Instrument-panel brightness.
Front fog lights.

This control adjusts the brightness of the instrument panel and dashboard illumination, allowing the driver to reduce or increase the lighting level.

Control for adjusting instrument-panel brightness
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you avoid stopping in a blind spot of a large vehicle?

33. Why should you avoid stopping in a blind spot of a large vehicle?

The driver can always see you in the mirrors.
Blind spots only matter when a vehicle is reversing.
Stopping beside a large vehicle makes you easier to see.
✓ The driver may not be able to see you.

Large vehicles have bigger blind spots. If you stop where the driver cannot see you, you may be at risk when the vehicle moves or turns.

Vehicle positioned in a large vehicle's blind spot
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should unnecessary engine idling be avoided?

34. Why should unnecessary engine idling be avoided?

It always causes the engine to overheat.
It immediately damages the brakes.
✓ It uses fuel without moving the vehicle.
It prevents the battery from charging.

An idling combustion engine uses fuel while the vehicle is stationary. Avoid unnecessary idling where it is safe and appropriate to switch the engine off, taking account of the vehicle manufacturer's instructions and local rules.

Stationary vehicle with its engine idling
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if you are unsure who has priority at a junction?

35. What should you do if you are unsure who has priority at a junction?

✓ Slow down and proceed only when it is safe.
Proceed if the other driver appears to be slowing down.
Enter slowly so the other driver has time to react.
Rely on eye contact and enter the junction first.

If priority is unclear, reduce speed, observe carefully, and avoid entering the junction until you are sure it is safe.

Vehicles approaching a junction with uncertain priority
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
How should you use the brake pedal during emergency braking in a vehicle with ABS?

36. How should you use the brake pedal during emergency braking in a vehicle with ABS?

✓ Press it firmly and keep it pressed.
Pump it rapidly.
Use the parking brake instead.
Release it if the pedal vibrates.

During emergency braking with ABS, press the brake pedal firmly and keep it pressed. Pulsation or vibration through the pedal can be normal while ABS is operating, so do not pump or release the brake.

Firm brake-pedal pressure during emergency braking with ABS
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if the oil-pressure warning light stays on?

37. What should you do if the oil-pressure warning light stays on?

✓ Stop safely, switch off the engine, and seek assistance.
Continue slowly until you reach a service station.
Ignore it if the engine sounds normal.
Increase the engine speed until the light goes out.

Low oil pressure can quickly cause severe engine damage. Stop as soon as it is safe, switch off the engine, and investigate the cause before continuing.

Oil-pressure warning illuminated on the dashboard
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you avoid sounding the horn near horses?

38. Why should you avoid sounding the horn near horses?

Using the horn gives the horse rider priority.
✓ The noise may frighten them.
The rider may think you are signalling them to stop.
The horn may make the horse move faster.

Horses can be startled by sudden or loud noises and may move unpredictably. Slow down, give them plenty of space, and avoid using the horn unless necessary.

Vehicle approaching a horse and rider
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does the ACC position of a traditional ignition switch normally allow?

39. What does the ACC position of a traditional ignition switch normally allow?

✓ Electrical accessories to be used without starting the engine.
The starter motor to turn the engine.
The transmission to select Drive.
The parking brake to release.

The ACC (accessory) position normally supplies power to certain electrical accessories, such as the audio system, without starting the engine. The exact functions available can vary between vehicles.

ACC accessory position on an ignition switch
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do when meeting another vehicle on a narrow mountain road?

40. What should you do when meeting another vehicle on a narrow mountain road?

Move toward the centre so the other driver gives way.
Stop where the road is narrowest and wait.
Drive onto the roadside without checking the surface.
✓ Slow down and use a safe passing place if necessary.

Narrow mountain roads may not provide enough space for two vehicles. Reduce speed and cooperate to pass safely.

Vehicles meeting on a narrow mountain road
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does this vehicle-control symbol indicate?

41. What does this vehicle-control symbol indicate?

Window lock.
Bonnet release.
✓ Boot or tailgate release.
Fuel-filler flap release.

This symbol indicates the boot or tailgate release. Operating the control unlocks or opens the luggage compartment, depending on the vehicle.

Boot or tailgate release control
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do before changing lanes?

42. What should you do before changing lanes?

Check only the lane directly beside you.
✓ Check your mirrors and blind spot.
Check the blind spot only after starting to move.
Rely on your mirrors without checking the blind spot.

Always check your mirrors, look over your shoulder if necessary, and make sure it is safe before changing lanes.

Driver checking surrounding traffic before changing lanes
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What is the clutch biting point?

43. What is the clutch biting point?

✓ The point where the clutch begins to transmit power to the wheels.
The point where the clutch pedal is fully pressed.
The point where the engine switches off.
The point where the parking brake releases.

The clutch biting point is reached as the clutch pedal is released and the clutch begins to transmit power from the engine to the transmission. Controlling this point helps the driver move off smoothly.

Clutch-pedal control when moving off
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do when a bus signals to pull away from a bus stop?

44. What should you do when a bus signals to pull away from a bus stop?

Drive closely beside the bus to prevent it moving out.
Sound your horn so the bus waits for you.
Ignore the signal until the bus starts moving.
✓ Slow down and be prepared to let it move out when safe.

Buses may pull away after picking up passengers. Slow down, check the traffic situation, and allow space when it is safe.

Bus signalling to pull away from a stop
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
How should a disabled vehicle be towed?

45. How should a disabled vehicle be towed?

✓ Use approved towing points and a method permitted by local rules.
At the highest possible safe speed.
By attaching a rope to the bumper.
With nobody controlling the disabled vehicle.

Incorrect towing can damage the vehicle or cause loss of control. Follow the manufacturer's instructions and local rules, and use professional recovery when the correct procedure is uncertain.

Disabled vehicle being towed
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does this dashboard symbol indicate?

46. What does this dashboard symbol indicate?

Diesel particulate filter warning.
✓ Diesel glow-plug preheating.
Engine-temperature warning.
Engine-management warning.

This symbol indicates the diesel glow-plug preheating system. In a diesel vehicle, wait for the light to go out before starting the engine when required. If it remains illuminated or flashes while driving, it may indicate a fault.

Diesel glow-plug preheating symbol on the dashboard
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do when people are waiting at a pedestrian crossing?

47. What should you do when people are waiting at a pedestrian crossing?

Sound your horn so pedestrians wait.
✓ Slow down and stop if they want to cross.
Continue if nobody has stepped onto the crossing.
Maintain your speed until someone starts crossing.

When people are waiting near a pedestrian crossing, reduce your speed and be ready to stop. Pedestrians may begin crossing at any moment.

People waiting at a pedestrian crossing
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if a child runs onto the road ahead?

48. What should you do if a child runs onto the road ahead?

✓ Brake firmly and be prepared to stop.
Sound your horn and continue driving.
Flash your lights instead of slowing down.
Accelerate to pass before the child moves further into the road.

Children can act unpredictably. Brake firmly, stay alert, and be prepared for more children to follow.

Child entering the road ahead of a vehicle
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Which roads are most likely to cause aquaplaning?

49. Which roads are most likely to cause aquaplaning?

Roads exposed to strong sunlight.
Roads with loose chippings.
Straight roads in dry weather.
✓ Roads with standing water or deep puddles.

Standing water can collect in dips, ruts, or puddles, increasing the chance that tyres will lose grip.

Standing water on a road surface
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why is riding a bicycle after drinking alcohol dangerous?

50. Why is riding a bicycle after drinking alcohol dangerous?

A small amount of alcohol improves balance.
A helmet protects you from alcohol-related risks.
✓ Alcohol can reduce your balance, coordination, judgement, and reaction time.
Alcohol affects driving more than cycling.

Alcohol can make it harder to balance, steer, judge distances, and react to hazards. Riding a bicycle while impaired may also be against the law.

Alcohol consumption and bicycle-riding safety
AI-generated by Traffic-rules.com • WCIT • CC BY-SA