QuizTraffic rulesNepal

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.


What wording is commonly shown on give-way signs in Nepal?

1. What wording is commonly shown on give-way signs in Nepal?

YIELD.
STOP.
✓ No wording.
GIVE WAY.

Give-way signs in Nepal normally use the inverted triangular symbol without wording.

Wording used on give-way and yield signs
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should unnecessary engine idling be avoided?

2. Why should unnecessary engine idling be avoided?

It prevents the battery from charging.
It always causes the engine to overheat.
It makes the tyres lose pressure.
✓ It uses fuel without moving the vehicle.

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
Why should you never leave a petrol or diesel engine running in an enclosed space?

3. Why should you never leave a petrol or diesel engine running in an enclosed space?

The engine can lose oil pressure.
✓ Dangerous carbon monoxide can build up.
The cooling system can stop working.
The tyres can lose pressure more quickly.

Exhaust gases from petrol and diesel engines can contain carbon monoxide, a poisonous gas that can build up quickly in an enclosed or poorly ventilated space. Never leave the engine running inside a closed garage or similar area.

Running vehicle engine in an enclosed space
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you slow down before a sharp bend?

4. Why should you slow down before a sharp bend?

To reduce fuel consumption.
To prevent other vehicles from overtaking.
To make the bend easier to see from a distance.
✓ To keep control of the vehicle.

Sharp bends reduce your view and can make the vehicle harder to control, so you should slow down before entering the bend.

Vehicle approaching a sharp bend
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you consider before selecting a lower gear in a manual vehicle?

5. What should you consider before selecting a lower gear in a manual vehicle?

Whether the steering wheel is centred.
Whether the headlights are switched on.
✓ Whether the vehicle's speed is suitable for the lower gear.
Whether the parking brake is applied.

Before selecting a lower gear, make sure the vehicle's speed is suitable for that gear. Selecting too low a gear at excessive speed can cause harsh engine braking and place unnecessary stress on the drivetrain.

Selecting a lower gear in a manual vehicle
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you check before starting a manual vehicle?

6. What should you check before starting a manual vehicle?

✓ That the gearbox is in neutral and the clutch is pressed.
That reverse gear is selected.
That the parking brake is released.
That first gear is selected and the accelerator is pressed.

Before starting a manual vehicle, make sure the gearbox is in neutral and press the clutch pedal. This helps prevent the vehicle from moving unexpectedly when the engine starts.

Clutch and gear checks before starting a manual vehicle
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you avoid changing lanes inside an intersection?

7. Why should you avoid changing lanes inside an intersection?

It can make it harder to maintain a steady speed.
✓ It can confuse other road users and increase collision risk.
It can make road markings harder to follow.
It can make your route through the junction longer.

Changing lanes inside an intersection can surprise drivers, cyclists, and pedestrians. It is safer to choose the correct lane before entering.

Vehicle changing lanes within a junction
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you look well ahead while driving?

8. Why should you look well ahead while driving?

To follow the vehicle ahead more closely.
✓ To identify developing hazards early and gain more time to react.
To maintain the same speed in every situation.
To avoid checking your mirrors as often.

Looking well ahead helps you identify developing hazards early, such as slowing traffic, pedestrians, junctions, or changing road conditions. Earlier detection gives you more time to assess the situation and respond smoothly and safely.

Driver observing the road and traffic ahead
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if the service brakes fail while driving?

9. What should you do if the service brakes fail while driving?

Continue slowly until the brakes begin working again.
Shift into neutral and let the vehicle coast to a stop.
Apply the parking brake suddenly at full force.
✓ Reduce speed using other available braking methods and stop safely.

Remain calm, warn other road users, and use other available braking methods to reduce speed. This may include engine braking or a lower gear, and careful use of the parking or emergency brake according to the vehicle's design. Steer toward the safest available stopping area.

Vehicle braking-system failure while driving
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if a large animal suddenly enters your path?

10. What should you do if a large animal suddenly enters your path?

Release the steering wheel and brake hard.
Accelerate to pass before the animal moves.
Turn suddenly toward the roadside.
✓ Brake firmly while keeping control of the vehicle.

If a large animal enters the road, brake firmly while keeping the vehicle under control. Avoid sudden swerving, as this can cause you to lose control or collide with other traffic.

Large animal entering a vehicle's path
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you take extra care if oil or diesel is spilled on the road?

11. Why should you take extra care if oil or diesel is spilled on the road?

It can increase tyre pressure.
It can make the brakes overheat.
It can damage road markings immediately.
✓ It can make the road extremely slippery.

Oil, diesel and other fluids can create a very slippery road surface, particularly for motorcycles and bicycles. Reduce speed, avoid sudden braking or steering and keep the vehicle as stable as possible when crossing a contaminated area.

Oil or diesel spilled on a road surface
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if a friend who has been drinking wants to drive?

12. What should you do if a friend who has been drinking wants to drive?

Give them coffee and wait a short while.
✓ Encourage them not to drive and arrange safe transport.
Follow them home in another vehicle.
Let them drive slowly on quiet roads.

Preventing an impaired person from driving can protect them, their passengers, and other road users. Arrange a sober driver, taxi, public transport, or accommodation.

Friends discussing safe transport after drinking
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you leave extra space when passing road workers?

13. Why should you leave extra space when passing road workers?

✓ They may be working close to moving traffic.
Road workers always have priority over passing traffic.
To avoid damaging temporary road markings.
Road workers are protected by the construction barriers.

Workers may be only a short distance from passing vehicles. Reduce speed and leave as much safe space as possible.

Vehicle passing workers close to the road
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if you feel tired while driving?

14. What should you do if you feel tired while driving?

Turn up the radio to stay alert.
Drink coffee and continue without stopping.
Drive faster to reach your destination sooner.
✓ Stop in a safe place and take a break.

Driving while tired reduces concentration and reaction time. Stop somewhere safe and rest before continuing.

Tired driver taking a break from a journey
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does this dashboard symbol indicate?

15. What does this dashboard symbol indicate?

✓ Parking assistance.
Adaptive cruise control.
Automatic emergency braking.
Lane-departure warning.

This symbol relates to the vehicle's parking assistance system. Depending on the vehicle, the system may use sensors or cameras to detect obstacles and assist the driver while parking.

Parking-assistance symbol on the dashboard
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should cyclists do after a collision or hard fall?

16. What should cyclists do after a collision or hard fall?

✓ Check yourself and inspect the bicycle before riding again.
Continue if you feel fine and the bicycle looks normal.
Check only the bicycle and ignore minor injuries.
Test the bicycle by riding it before checking for damage.

A fall can damage the brakes, wheels, frame, handlebars, or helmet. Injuries may also not be immediately obvious.

Checking a bicycle after a fall or collision
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
How should a three-point seat belt normally be worn during pregnancy?

17. How should a three-point seat belt normally be worn during pregnancy?

With the shoulder belt placed behind the back.
Using only the lap section of the seat belt.
Loosely fitted so it does not press against the body.
✓ With the lap belt low across the hips and the shoulder belt across the chest.

During pregnancy, a three-point seat belt should be worn correctly. The lap belt should sit low across the hips, below the abdomen, while the shoulder belt should pass across the chest and to the side of the abdomen. The belt should fit snugly and should not be placed behind the back or under the arm.

Seat-belt positioning during pregnancy
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do before driving down a long, steep hill?

18. What should you do before driving down a long, steep hill?

✓ Reduce speed and select a suitable lower gear.
Select a higher gear to reduce engine resistance.
Accelerate before the descent to maintain momentum.
Coast in neutral to save fuel.

A lower gear helps control your speed and reduces the amount of continuous braking needed on a long descent.

Vehicle approaching a long, steep descent
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do when temporary traffic lights show red?

19. What should you do when temporary traffic lights show red?

Proceed if no road workers are visible.
Only permanent traffic lights are valid.
✓ Stop before the signal or temporary stop line.
Continue if the road ahead appears clear.

Temporary traffic signals must be obeyed like permanent signals. Stop and wait until you are permitted to continue.

Red signal on temporary roadworks traffic lights
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?

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

Accelerate and pass before the bus moves out.
✓ Slow down and be prepared to let it move out when safe.
Sound your horn so the bus waits for you.
Drive closely beside the bus to prevent it moving out.

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
What does this dashboard symbol indicate?

21. What does this dashboard symbol indicate?

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

This symbol indicates a problem with the vehicle's charging system. If it remains illuminated while the engine is running, the battery may not be charging correctly because of a fault with the alternator, battery, wiring, or related components.

Charging-system warning symbol on the dashboard
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do after hitting a deep pothole hard?

22. What should you do after hitting a deep pothole hard?

Continue driving normally if the tyre still looks inflated.
Reduce the tyre pressure to absorb further bumps.
✓ Check for tyre or wheel damage when it is safe to stop.
Brake sharply to check whether the wheels are damaged.

A hard impact with a pothole can damage tyres, wheel rims, steering, suspension, or wheel alignment. When it is safe to stop, inspect the tyres and wheels and pay attention to unusual vibration, pulling, or steering changes. Have the vehicle checked if you suspect damage.

Checking a tyre and wheel after hitting a pothole
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do with a manual parking brake before driving away?

23. What should you do with a manual parking brake before driving away?

Leave it partly applied.
✓ Release it fully.
Apply it only after moving off.
Pull it up further.

The manual parking brake should be released fully before driving away. Driving with it partly applied can cause unnecessary brake wear and overheating.

Releasing a manual handbrake before driving away
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you remove dark sunglasses before entering a tunnel?

24. Why should you remove dark sunglasses before entering a tunnel?

To make the vehicle headlights work more effectively.
To prevent the lenses from reflecting tunnel lights.
✓ Your eyes need to adjust to the lower light level.
Because tunnel lighting can damage dark lenses.

Dark sunglasses reduce the amount of light reaching your eyes and can make hazards inside a tunnel harder to see.

Driver removing sunglasses before entering a tunnel
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you avoid sudden steering movements on snow or ice?

25. Why should you avoid sudden steering movements on snow or ice?

They make the tyres wear more quickly.
They reduce the effectiveness of the headlights.
✓ They can cause the tyres to lose grip and the vehicle to skid.
They increase fuel consumption.

Abrupt steering can overwhelm the limited grip available on a slippery surface. Steering smoothly helps keep the vehicle stable.

Steering a vehicle on a snowy road
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What is the best place to cross the road?

26. What is the best place to cross the road?

✓ At a designated crossing.
At the shortest point, even if visibility is limited.
At a junction without checking for turning traffic.
Between parked vehicles if traffic appears quiet.

Use a designated crossing whenever possible. It is usually the safest place to cross the road.

Designated crossing for pedestrians
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should headlights, indicators, and other exterior lights be kept clean and working?

27. Why should headlights, indicators, and other exterior lights be kept clean and working?

They make the vehicle use less fuel.
They prevent the windscreen from misting.
They only need to work when you drive at night.
✓ They help you see, be seen, and communicate your intentions.

Dirty or faulty lights reduce visibility and make it harder for other road users to understand when you are braking, turning, reversing, or changing position.

Checking and cleaning a vehicle's exterior lights
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you avoid using air recirculation for too long in damp conditions?

28. Why should you avoid using air recirculation for too long in damp conditions?

✓ It can cause the windows to mist.
It can overheat the engine.
It can reduce tyre pressure.
It can switch off the air conditioning.

Using air recirculation for too long in damp conditions can allow moisture to build up inside the vehicle and increase window misting, especially when the air conditioning is not dehumidifying the air. Switching to fresh outside air can help clear condensation.

Air-recirculation setting and misted vehicle windows
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if an EV charging cable or connector is damaged?

29. What should you do if an EV charging cable or connector is damaged?

Cover the damaged area and continue charging.
✓ Do not use it, and report or arrange repair of the damage.
Use it if the vehicle still begins charging.
Hold the damaged section away from the vehicle.

Do not use a damaged charging cable or connector. Damage can create a risk of electric shock, overheating, or fire. Use suitable undamaged charging equipment and report the fault or arrange professional repair or replacement.

Damaged electric-vehicle charging cable or connector
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you check before beginning a journey in severe winter weather?

30. What should you check before beginning a journey in severe winter weather?

✓ The weather, road conditions, tyres, fuel or charge, and emergency supplies.
Only whether the main roads have been cleared.
Check whether other vehicles are using the roads.
Nothing extra if the vehicle has winter tyres.

Check whether the journey is necessary and prepare for delays or changing conditions. Suitable tyres, sufficient fuel or charge, warm clothing, and basic emergency supplies may be important.

Preparing a vehicle for a winter journey
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you be prepared for changing conditions on mountain roads?

31. Why should you be prepared for changing conditions on mountain roads?

✓ Weather, visibility, and road conditions can change quickly.
Mountain roads always have the same weather.
Road signs become less important at higher elevations.
Vehicles automatically lose engine power in the mountains.

Fog, rain, snow, ice, falling rocks, and strong winds can develop rapidly in mountainous areas.

Changing visibility and weather on a mountain road
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do around a damaged electric or hybrid vehicle?

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

✓ Keep clear of damaged high-voltage components and call trained assistance.
Assume the system is safe once the vehicle is switched off.
Move damaged high-voltage parts away from the road.
Inspect damaged cables closely before calling for help.

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
What can selecting a lower gear provide in a manual vehicle?

33. What can selecting a lower gear provide in a manual vehicle?

A shorter steering ratio.
Higher tyre pressure.
✓ Greater engine braking.
Automatic parking-brake operation.

Selecting a suitable lower gear can increase engine braking, helping the vehicle slow or control its speed without relying entirely on the brakes.

Manual gear selection for engine braking
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you expect when leaving a tunnel in bright sunlight?

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

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

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 should you reduce speed in fog?

35. Why should you reduce speed in fog?

To prevent the windscreen from misting.
To reduce fuel consumption.
✓ Because you have less time to react to hazards you cannot see.
To prevent moisture from entering the engine.

Fog can hide obstacles, pedestrians, and other vehicles. Lower speed gives you more time to react.

Fog limiting a driver's view ahead
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if your motorcycle helmet visor starts to fog?

36. What should you do if your motorcycle helmet visor starts to fog?

✓ Reduce speed and clear the visor safely.
Keep riding at the same speed until it clears.
Close all helmet vents completely.
Wipe the inside of the visor while riding.

A fogged visor can seriously reduce your view of the road. Reduce speed and use the helmet's ventilation, demisting or anti-fog features where available. If you cannot restore a clear view safely, stop in a safe place before continuing.

Misted visor on a motorcycle helmet
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if a tyre-pressure warning appears and handling changes?

37. What should you do if a tyre-pressure warning appears and handling changes?

Accelerate slightly to warm the tyre.
Brake firmly to test whether the tyre still has grip.
✓ Reduce speed and stop safely to check the tyres.
Continue until the warning light goes out by itself.

A pressure loss or damaged tyre can affect steering and braking. If the tyre-pressure warning appears together with a change in handling, it may indicate a serious tyre problem. Stop safely and inspect the tyres before continuing.

Tyre-pressure warning and a tyre inspection
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if a tyre has a deep cut, bulge, or exposed cords?

38. What should you do if a tyre has a deep cut, bulge, or exposed cords?

✓ Stop using the tyre and arrange professional inspection or replacement.
Drive slowly until the next scheduled service.
Move the damaged tyre to another wheel position.
Increase the tyre pressure and continue driving.

Cuts, bulges, and exposed cords can indicate serious structural damage. The tyre may fail suddenly and should not be used normally.

Damaged vehicle tyre requiring inspection
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if you see smoke or fire inside a tunnel?

39. What should you do if you see smoke or fire inside a tunnel?

Stay inside the vehicle and wait for the smoke to clear.
Reverse toward the entrance without checking behind.
✓ Follow tunnel instructions and leave the tunnel if it is safe to do so.
Keep driving normally unless the tunnel is completely blocked.

If it is safe to drive out of the tunnel, do so. If you cannot continue safely, stop, switch off the engine, leave the vehicle, and use the marked emergency exits or refuge routes. Follow tunnel-control instructions.

Smoke inside a road tunnel
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Which gear is used to drive a manual vehicle backwards?

40. Which gear is used to drive a manual vehicle backwards?

✓ R (Reverse).
Neutral.
1st gear.
2nd gear.

Select R (Reverse) when you need to drive a manual vehicle backwards. The vehicle should be stationary before Reverse is selected.

Manual gear lever and gear-selection pattern
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does this dashboard symbol indicate?

41. What does this dashboard symbol indicate?

✓ Front windscreen demister.
Air conditioning.
Rear window demister.
Windscreen washer.

This symbol indicates the front windscreen demister. It directs airflow towards the windscreen to help clear condensation, mist or frost and restore a clear view.

Front windscreen demister symbol on the dashboard
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you check after fitting a child restraint?

42. What should you check after fitting a child restraint?

That the restraint can move freely on the seat.
That the seat belt is routed in any convenient way.
That the restraint is tilted as far back as possible.
✓ That it is securely installed and correctly fitted.

A child restraint should be installed securely and used according to the manufacturer's instructions. Check that the seat is firmly attached, the belt or ISOFIX connection is correct, and the child is restrained properly before driving.

Checking the installation of a child car seat
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Are motorcycle riders generally required to wear a helmet in Nepal?

43. Are motorcycle riders generally required to wear a helmet in Nepal?

No.
✓ Yes.

Motorcycle riders in Nepal are generally required to wear an approved helmet.

Motorcyclist wearing a protective helmet
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you normally do after completing an overtake?

44. What should you normally do after completing an overtake?

Move back immediately in front of the vehicle you passed.
✓ Return to the normal driving lane when it is safe.
Stay beside the vehicle until there is another reason to change lanes.
Remain in the overtaking lane until another vehicle approaches.

After overtaking, return to the normal driving lane when you have passed the other vehicle by a safe distance. Check your mirrors, signal when appropriate, and avoid moving back too soon.

Vehicle returning to its lane after overtaking
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does this dashboard symbol indicate?

45. What does this dashboard symbol indicate?

Automatic start-stop system.
Lane-departure warning.
✓ Adaptive cruise control.
Electronic stability control.

This symbol relates to adaptive cruise control (ACC). The system can maintain a selected speed and automatically adjust the vehicle's speed to help maintain a set distance from traffic ahead.

Adaptive cruise-control symbol on the dashboard
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
How can you check that a manual gearbox is in neutral?

46. How can you check that a manual gearbox is in neutral?

Press the accelerator pedal.
Turn the steering wheel.
Pull up the parking brake.
✓ Move the gear lever gently from side to side.

When a manual gearbox is in neutral, the gear lever can normally be moved freely from side to side across the centre of the gear pattern. Check that neutral is selected before starting the engine when appropriate.

Checking neutral with a manual gear lever
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if you approach slow-moving farm machinery?

47. What should you do if you approach slow-moving farm machinery?

Drive close behind until there is room to pass.
✓ Keep a safe distance and overtake only when safe.
Overtake as soon as the road becomes slightly wider.
Use your horn so the driver moves aside.

Farm machinery may be wide, slow, or turn unexpectedly. Keep distance and only overtake when you have a clear view and enough space.

Vehicle approaching slow-moving farm machinery
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What is important when raising a vehicle with its jack?

48. What is important when raising a vehicle with its jack?

✓ Use the correct jacking point and never go underneath a vehicle on a jack.
Work underneath if the jack appears stable.
Place the jack on soft ground to prevent floor damage.
Use any solid-looking part underneath the vehicle.

A jack can slip or fail if it is incorrectly positioned. Secure the vehicle and use additional approved supports before working underneath it.

Vehicle raised at a jacking point for a wheel change
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
How should a motorcyclist brake in an emergency?

49. How should a motorcyclist brake in an emergency?

Use only the rear brake.
✓ Apply both brakes firmly and progressively.
Steer sharply while braking hard.
Release both brakes before stopping.

During emergency braking, use both brakes firmly and progressively while keeping the motorcycle as upright and stable as practical. Avoid sudden steering. If ABS is fitted, maintain firm braking pressure and allow the system to work.

Motorcyclist making an emergency stop
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if passengers are distracting you while driving?

50. What should you do if passengers are distracting you while driving?

Continue the conversation while watching the road.
✓ Ask them to stop and keep your attention on the road.
Turn around briefly so you can speak to them.
Ignore the traffic until the distraction has passed.

Passengers can reduce a driver's attention and concentration. If their behaviour becomes distracting, ask them to stop and keep your focus on driving. If necessary, stop somewhere safe before dealing with the situation.

Passengers distracting a driver
AI-generated by Traffic-rules.com • WCIT • CC BY-SA