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QuizTraffic rulesThailand

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
Thailand
True/false 17 Thailand 17 Car controls 109 Dashboard lights 40 Priority rules 9 Pedestrians 19 Cyclists 20 Show all 584
How should a three-point seat belt normally be worn during pregnancy?

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

With the lap belt positioned across the abdomen.
✓ With the lap belt low across the hips and the shoulder belt across the chest.
Using only the lap section of the seat belt.
With the shoulder belt placed behind the back.

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 if oncoming headlights dazzle you at night?

2. What should you do if oncoming headlights dazzle you at night?

Move closer to the centre of the road for a clearer view.
Maintain your speed until the vehicle has passed.
✓ Slow down and look toward the edge of your lane.
Look briefly at the headlights to judge their position.

Bright headlights can reduce your vision. Avoid staring at them, slow down if needed, and use the road edge or lane markings to guide you safely.

Oncoming headlights dazzling a driver at night
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does this dashboard symbol indicate?

3. What does this dashboard symbol indicate?

Brake warning.
Emergency braking.
Rear fog lights.
✓ Hazard warning lights.

This symbol indicates the hazard warning lights. When activated, all direction indicators flash simultaneously to warn other road users of a hazard or unusual situation.

Hazard warning light symbol on the dashboard
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if a motorcycle helmet visor is badly scratched?

4. What should you do if a motorcycle helmet visor is badly scratched?

✓ Replace it before riding.
Keep using it if the weather is dry.
Ride with the visor raised.
Cover the scratches with clear tape.

A badly scratched or damaged visor can reduce or distort your view, especially in bright sunlight or at night. Replace a visor that no longer provides a clear, safe view and follow the helmet manufacturer's instructions.

Scratched visor on a motorcycle helmet
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What is the general motorway speed limit for cars in Thailand?

5. What is the general motorway speed limit for cars in Thailand?

110 km/h.
130 km/h.
Other speed limit.
✓ 120 km/h.

The general motorway speed limit for cars in Thailand is 120 km/h, unless signs indicate otherwise.

Motorway speed limits for cars
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you leave extra space when passing road workers?

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

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

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
Why should you reduce speed when approaching roadworks?

7. Why should you reduce speed when approaching roadworks?

To reduce wear on the vehicle suspension.
✓ Road workers, narrow lanes, and unexpected hazards may be present.
To reduce exhaust gases near construction sites.
To keep construction dust off the windscreen.

Roadworks can involve workers, machinery, changing lane layouts, and uneven surfaces. Lower speed gives you more time to react.

Vehicle approaching a roadworks area
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if your vehicle begins rolling backward on a steep incline?

8. What should you do if your vehicle begins rolling backward on a steep incline?

Let it roll backwards and try again.
Switch off the engine and restart immediately.
Open the door and step out.
✓ Apply the brake, secure the vehicle, and restart carefully.

Stop the vehicle under control, apply the parking brake if necessary, and prepare to move away again safely.

Vehicle rolling backwards on a steep incline
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if an overtaking vehicle is coming toward you?

9. What should you do if an overtaking vehicle is coming toward you?

✓ Slow down and move slightly aside if safe.
Accelerate to pass the danger point more quickly.
Maintain your speed and expect the other driver to return to their lane.
Move closer to the centre so the other driver notices you.

If an oncoming vehicle creates danger while overtaking, reduce speed and make space if it is safe to do so. Avoid sudden movements that could create an additional hazard.

Oncoming vehicle overtaking into the driver's lane
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What is the legal blood alcohol limit for ordinary drivers in Thailand?

10. What is the legal blood alcohol limit for ordinary drivers in Thailand?

0.8 g/L.
0.2 g/L.
0.0 g/L.
✓ 0.5 g/L.

The legal blood alcohol limit for ordinary drivers in Thailand is 0.5 g/L.

Alcohol limits for ordinary drivers
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do when approaching a narrow road with oncoming traffic?

11. What should you do when approaching a narrow road with oncoming traffic?

✓ Slow down and give space when needed.
Continue first if you entered the narrow section earlier.
Expect the oncoming driver to make room for you.
Maintain your speed if there appears to be enough room.

On narrow roads, reduce speed and be prepared to stop or use a suitable passing place. Leave enough space for the oncoming vehicle and avoid forcing either vehicle into an unsafe position.

Oncoming vehicles approaching a narrow stretch of road
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you avoid resting your hand on the gear lever while driving?

12. Why should you avoid resting your hand on the gear lever while driving?

✓ It can cause unnecessary wear in the gear-selection mechanism.
It can apply the parking brake.
It can disengage the clutch.
It can increase engine speed.

Resting your hand on the gear lever can place unnecessary pressure on parts of the gear-selection mechanism and contribute to wear. Keep both hands on the steering wheel when you are not changing gear.

Driver's hand resting on a manual gear lever
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does this vehicle-control symbol indicate?

13. What does this vehicle-control symbol indicate?

Automatic headlights.
Front fog lights.
Main beam.
✓ Headlight level adjustment.

This control adjusts the vertical aim of the headlights. It can be used to lower the beam when the vehicle is heavily loaded, helping to avoid dazzling other road users.

Control for adjusting the headlight beam height
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do before reversing your vehicle?

14. What should you do before reversing your vehicle?

Check the mirrors and reverse if they appear clear.
Sound the horn before reversing and proceed.
✓ Check all around and make sure it is safe.
Check behind only after you start moving.

Before reversing, check all around the vehicle, including blind spots, for pedestrians, cyclists, vehicles, and other hazards. Reverse slowly and keep checking as you move.

Vehicle preparing to reverse from a driveway
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
How should luggage be carried on a bicycle?

15. How should luggage be carried on a bicycle?

On one handlebar if the bag is not very heavy.
On one side of the bicycle to leave the other side clear.
✓ Securely, without affecting steering, braking, or balance.
On the rear carrier without securing it for a short trip.

Loose or badly positioned luggage can interfere with control, become caught in the wheels, or hide bicycle lights.

Luggage carried on a bicycle
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Are moped riders generally required to wear a helmet in Thailand?

16. Are moped riders generally required to wear a helmet in Thailand?

No.
✓ Yes.

Moped riders in Thailand are generally required to wear an approved helmet.

Moped rider wearing a helmet
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
How should luggage be carried on a motorcycle?

17. How should luggage be carried on a motorcycle?

Loosely strapped so it can move with the motorcycle.
✓ Securely and evenly, without affecting balance or control.
Hanging from the handlebars if the luggage is light.
As high as possible so it stays away from the wheels.

Motorcycle luggage should be securely fastened and sensibly distributed. A loose, uneven or badly positioned load can affect balance, steering and braking, or become caught in moving parts.

Luggage carried on a motorcycle
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
How should you position your vehicle beside a fuel pump?

18. How should you position your vehicle beside a fuel pump?

With the fuel hose stretched tightly across the vehicle.
Wherever there is space, regardless of the fuel-filler position.
As close to the pump as possible, even if access is restricted.
✓ With the fuel-filler side close enough for the hose to reach safely.

Position the vehicle so the fuel filler is close to the pump and the hose can reach without being stretched tightly across or around the vehicle. Stop within the designated refuelling area and leave enough space to use the pump safely.

Vehicle positioned beside a fuel pump
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you remove dark sunglasses before entering a tunnel?

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

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

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
What should you check after fitting a child restraint?

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

That the child can easily loosen the harness.
✓ That it is securely installed and correctly fitted.
That the seat belt is routed in any convenient way.
That the restraint can move freely on the seat.

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
Why is adequate tyre tread important?

21. Why is adequate tyre tread important?

It prevents tyres from losing air pressure.
✓ It helps maintain grip and move water away from the tyre.
It increases the amount of power from the engine.
It makes wheel alignment unnecessary.

Tyre tread helps the vehicle grip the road and disperse water. Worn tread increases the risk of skidding and aquaplaning, especially in wet conditions.

Tread grooves on a vehicle tyre
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Which selector position is used to drive the vehicle backwards?

22. Which selector position is used to drive the vehicle backwards?

✓ R (Reverse).
D (Drive).
P (Park).
N (Neutral).

Select R (Reverse) when you need to drive the vehicle backwards. The vehicle should be stationary before selecting Reverse.

Automatic gear selector with P, R, N and D positions
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
When should you select R (Reverse) in an automatic vehicle?

23. When should you select R (Reverse) in an automatic vehicle?

✓ After the vehicle has come to a complete stop.
Whenever you want to reduce speed.
Before pressing the brake pedal.
While the vehicle is still moving forward slowly.

Select R (Reverse) only after the vehicle has come to a complete stop. Selecting Reverse while the vehicle is still moving forward can damage the transmission.

Selecting Reverse in a stationary automatic vehicle
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do when walking near a driveway?

24. What should you do when walking near a driveway?

Assume vehicles will stop before crossing your path.
Rely on engine noise to warn you of vehicles.
✓ Watch for vehicles entering or leaving.
Watch only for vehicles leaving the driveway.

Vehicles may enter or leave driveways suddenly. Stay alert and check for moving vehicles.

Pedestrian passing a driveway entrance
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why can mixing alcohol with medicine be dangerous for drivers?

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

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

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
Why should you avoid overtaking when approaching a pedestrian crossing?

26. Why should you avoid overtaking when approaching a pedestrian crossing?

Crossing markings can make lane changes more difficult.
Vehicles use more braking distance near crossings.
The crossing may make it harder to judge your speed.
✓ A pedestrian may be hidden by the vehicle ahead.

A vehicle slowing or stopping near a pedestrian crossing may be hiding someone who is crossing. Overtaking could put you directly into the pedestrian's path.

Vehicles approaching a pedestrian crossing
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why can loud music be dangerous while cycling?

27. Why can loud music be dangerous while cycling?

✓ You may not hear traffic or warning sounds.
It makes the brakes respond more slowly.
It makes bicycle lights less effective.
It makes the bicycle harder to balance.

Hearing approaching vehicles, bells, horns, and other warning sounds is an important part of staying aware.

Cyclist listening to music near traffic
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if the windscreen wipers stop working during heavy rain?

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

Use the washer fluid repeatedly to clear the windscreen.
Continue slowly using the hazard lights.
✓ Reduce speed and stop in a safe place as soon as possible.
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
Who should always wear a seat belt?

29. Who should always wear a seat belt?

Only the driver.
✓ Everyone in the vehicle.
Only children and young passengers.
Only people in the front seats.

Seat belts greatly reduce the risk of serious injury in a crash and should be worn by everyone in the vehicle.

Vehicle occupants wearing seat belts
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why can swerving suddenly to avoid a small animal be dangerous?

30. Why can swerving suddenly to avoid a small animal be dangerous?

Swerving increases the vehicle's stopping distance.
✓ You may lose control or collide with another road user.
The tyres can be damaged by sudden steering.
Small animals usually move away before you reach them.

A sudden swerve can take you into another lane, off the road, or into nearby traffic.

Small animal in the road ahead of a vehicle
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Which gear is normally used when moving off from a standstill?

31. Which gear is normally used when moving off from a standstill?

2nd gear.
Reverse.
✓ 1st gear.
Neutral.

1st gear is normally used when moving off from a standstill because it provides the greatest pulling power at low speed.

Manual gear lever and gear-selection pattern
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do when an automatic vehicle is stationary in D?

32. What should you do when an automatic vehicle is stationary in D?

Select reverse gear.
Release the parking brake.
✓ Keep the brake pedal pressed.
Press the accelerator lightly.

An automatic vehicle may creep forward when D (Drive) is selected, even without pressing the accelerator. Keep the brake pedal pressed while stationary to prevent unintended movement.

Automatic gear selector in Drive and brake-pedal control
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do before crossing behind a bus or large vehicle?

33. What should you do before crossing behind a bus or large vehicle?

Listen for traffic and cross if you hear none.
Cross as soon as the vehicle has stopped.
✓ Wait until you have a clear view of the road.
Cross if the nearest traffic lane appears clear.

Large vehicles can block your view and hide you from drivers. Wait until you can clearly see the road before crossing.

Pedestrian preparing to cross behind a bus
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
You may drive through an amber light without slowing down.

34. You may drive through an amber light without slowing down.

True.
✓ False.

An amber light means you should stop if you can do so safely. If you are too close to stop safely, continue through the junction with caution.

Vehicle approaching an amber traffic light
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you slow down near schools or playgrounds?

35. Why should you slow down near schools or playgrounds?

School zones are closed to normal traffic.
✓ Children may behave unpredictably.
Children are easier to see when you drive slowly.
Children always have priority near schools.

Children may suddenly cross the road or move unexpectedly, so drivers should slow down and stay alert near schools and playgrounds.

Vehicle approaching a school or playground area
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does this dashboard symbol indicate?

36. What does this dashboard symbol indicate?

✓ Diesel glow-plug preheating.
Diesel particulate filter warning.
Charging-system 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 before driving with a load?

37. What should you do before driving with a load?

Place heavy items on top of lighter items.
Check the load only after you have started driving.
Leave light items loose for short journeys.
✓ Make sure it is properly secured and cannot move or fall.

An unsecured load can shift, affect vehicle control, or fall into the road. Check that everything is safely restrained before moving.

Checking a vehicle's load before setting off
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does this dashboard symbol indicate?

38. What does this dashboard symbol indicate?

✓ A general warning requiring attention.
Electronic stability control.
A brake-system fault.
An engine-management fault.

This is a general or master warning symbol. It indicates that the vehicle has detected a condition requiring attention and is often accompanied by a message or another warning on the instrument display.

General warning symbol on the dashboard
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What information is needed when requesting emergency assistance?

39. What information is needed when requesting emergency assistance?

Your insurance details and last service date.
Your name, destination, and planned route.
✓ Your exact location, direction of travel, vehicle details, and the problem.
Only the road name and nearest town.

Road numbers, junctions, location markers, direction of travel, and a clear description of the incident help assistance reach you quickly.

Requesting help after a vehicle breakdown
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does this dashboard symbol indicate?

40. What does this dashboard symbol indicate?

Differential lock.
Parking assistance.
✓ Four-wheel-drive system.
Electronic stability control.

This symbol relates to the vehicle's four-wheel-drive system, which can transmit power to all four wheels. The exact symbol and operating modes vary between vehicles.

Four-wheel-drive system symbol on the dashboard
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
How should an EV charging cable be positioned where pedestrians may pass?

41. How should an EV charging cable be positioned where pedestrians may pass?

Loose on the ground so pedestrians can step over it.
Around nearby street furniture to keep it under tension.
✓ So it does not create a trip hazard or obstruct the route.
Across the shortest possible route, even if people walk there.

An EV charging cable should be positioned so it does not create a trip hazard or unnecessarily obstruct pedestrians. Where a cable must cross a walking route, use an appropriate approved cable-management or protection system and follow local requirements.

Charging cable near a pedestrian route
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 the blind spot only after starting to move.
✓ Check your mirrors and blind spot.
Speed up and move over before nearby traffic catches up.

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
Why should you leave space when cycling beside parked cars?

43. Why should you leave space when cycling beside parked cars?

✓ A door may open suddenly.
Because the road could be slippery beside parked cars.
To stay outside the marked parking area.
To make it easier for traffic to overtake you.

A driver or passenger may open a door without seeing you. Leaving space reduces the risk of a dooring collision.

Cyclist riding beside parked cars
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if the service brakes fail while driving?

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

Shift into neutral and let the vehicle coast to a stop.
✓ Reduce speed using other available braking methods and stop safely.
Switch off the engine immediately while moving.
Apply the parking brake suddenly at full force.

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
You should adjust your mirrors before you start driving.

45. You should adjust your mirrors before you start driving.

✓ True.
False.

Properly adjusted mirrors improve visibility and help you monitor traffic around your vehicle.

Driver adjusting a mirror before setting off
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does this dashboard symbol indicate?

46. What does this dashboard symbol indicate?

✓ Cruise control.
Power-steering warning.
Speed limiter.
Electronic stability control.

This symbol indicates the cruise-control system. Cruise control can maintain a selected vehicle speed without the driver continuously pressing the accelerator. The exact indicator behaviour can vary between vehicles.

Cruise-control indicator symbol on the dashboard
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you be careful when turning across oncoming traffic?

47. Why should you be careful when turning across oncoming traffic?

Turning gives you priority over approaching traffic.
✓ You must judge the speed and distance of approaching vehicles.
Your steering becomes less responsive during the turn.
Turning makes your vehicle take longer to accelerate.

Turning across traffic requires careful observation. Misjudging speed or distance can lead to a serious collision.

Vehicle preparing to turn across oncoming traffic
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
How can alcohol affect your driving ability?

48. How can alcohol affect your driving ability?

✓ It can reduce judgement, coordination, and reaction speed.
It improves your ability to judge distance.
It has no effect if you drive slowly.
It makes your reactions faster.

Alcohol affects several abilities needed for safe driving, including concentration, decision-making, coordination, and hazard perception.

Alcohol impairment and driving ability
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What is the purpose of the clutch pedal in a manual vehicle?

49. What is the purpose of the clutch pedal in a manual vehicle?

To slow the vehicle using the brakes.
✓ To disconnect the engine from the transmission.
To apply the parking brake.
To increase the engine speed.

Pressing the clutch pedal temporarily disconnects the engine from the transmission, allowing the driver to change gear or stop without stalling the engine.

Clutch pedal in a manual vehicle
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does this vehicle-control symbol indicate?

50. What does this vehicle-control symbol indicate?

✓ Seat adjustment.
Seat heating.
Lumbar support.
Mirror adjustment.

This control adjusts the position of the seat. Depending on the vehicle, it may move the seat forwards or backwards, raise or lower it, or change the backrest angle.

Control for adjusting the driver's seat
AI-generated by Traffic-rules.com • WCIT • CC BY-SA