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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
What does the intermittent wiper interval control adjust?

51. What does the intermittent wiper interval control adjust?

The speed of the rear wiper.
✓ The time between wiper sweeps.
The brightness of the dashboard.
The amount of washer fluid sprayed.

The intermittent wiper interval control adjusts the time between windscreen-wiper sweeps, allowing the driver to match the wiping frequency to light rain or spray.

Interval adjustment for intermittent windscreen wiping
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does this vehicle-control symbol indicate?

52. What does this vehicle-control symbol indicate?

Window lock.
✓ Child safety lock.
Mirror adjustment.
Central door locking.

This control activates the child safety lock. It helps prevent a rear door from being opened from inside the vehicle, depending on the vehicle and system design.

Child safety lock control and symbol
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do before driving down a long, steep hill?

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

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

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 if fuel spills while you are refuelling?

54. What should you do if fuel spills while you are refuelling?

Continue filling the tank and clean it up afterwards.
Wash the spill away with water and continue refuelling.
Ignore the spill if only a small amount escaped.
✓ Stop refuelling, avoid ignition sources, and alert station staff.

If fuel is spilled, stop refuelling immediately and keep flames, sparks, and other ignition sources away. Do not start the vehicle until the situation is safe. Alert filling-station staff and follow their instructions for dealing with the spill.

Fuel spilled during refuelling
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Rain can reduce tyre grip and increase stopping distance.

55. Rain can reduce tyre grip and increase stopping distance.

✓ True.
False.

Wet roads reduce traction, so your vehicle may need more distance to stop safely.

Vehicle travelling on a wet road
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What is the purpose of heated door mirrors?

56. What is the purpose of heated door mirrors?

✓ To clear mist or ice from the mirror glass.
To adjust the mirror angle.
To fold the mirrors automatically.
To improve the headlights.

Heated door mirrors warm the mirror glass to help clear mist, condensation, or light ice and improve rearward visibility. On some vehicles, they operate together with the rear-window demister.

Heated door-mirror control and demisting function
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
When should a passenger get on or off a motorcycle?

57. When should a passenger get on or off a motorcycle?

As soon as the engine has been started.
✓ When the motorcycle is stationary and the rider is ready.
Whenever the passenger feels ready.
While the motorcycle is moving slowly.

A passenger getting on or off can shift the motorcycle's balance suddenly. The motorcycle should be stationary and stable, and the passenger should wait until the rider is ready and prepared to support the extra movement.

Passenger getting onto a stationary motorcycle
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you check before connecting an electric vehicle to a charger?

58. What should you check before connecting an electric vehicle to a charger?

That the charging cable is as long as possible.
✓ That the connector and charging equipment are suitable for the vehicle.
That the vehicle doors remain unlocked.
That the charger provides its maximum power.

Charging connectors and charging capabilities can vary between vehicles and charging stations. Use compatible charging equipment that is suitable for the vehicle and follow the vehicle and charger manufacturer's instructions.

Matching an electric vehicle's connector to suitable charging equipment
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should a designated driver do?

59. What should a designated driver do?

Stop drinking shortly before driving.
Drink only low-alcohol drinks.
✓ Remain alcohol-free for the entire journey.
Drink only a small amount with food.

A designated driver should remain sober so they can drive safely and respond properly to traffic conditions.

Alcohol-free designated driver for a journey
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
How should a motorcyclist cross tram or railway rails?

60. How should a motorcyclist cross tram or railway rails?

While braking firmly on the rails.
With the motorcycle leaning sharply.
By accelerating hard as the front wheel reaches the rail.
✓ At a safe angle, as close to perpendicular as practical.

Rails can be slippery and can catch a motorcycle tyre, especially when wet. Cross them at a sufficiently large angle, as close to perpendicular as practical, and avoid sudden braking, acceleration or steering while crossing.

Motorcycle crossing rails in the road
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Which control activates all direction indicators at the same time?

61. Which control activates all direction indicators at the same time?

The rear-window demister.
The headlight switch.
The parking-brake control.
✓ The hazard warning light switch.

The hazard warning light switch activates all direction indicators at the same time to warn other road users of a hazard or emergency.

Hazard warning light switch and triangle symbol
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you adjust the seat and mirrors correctly before driving?

62. Why should you adjust the seat and mirrors correctly before driving?

To reduce the vehicle's stopping distance.
To make the steering and pedals easier to operate.
✓ To maintain good control and a clear view around the vehicle.
To improve the grip of the tyres.

A correct driving position helps you operate the pedals and steering comfortably and maintain proper control. Correctly adjusted mirrors improve your view around the vehicle and help reduce blind spots. Adjust both before starting your journey.

Adjusting the driving position and mirrors before a journey
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you be prepared for changing conditions on mountain roads?

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

Road conditions usually improve as altitude increases.
Mountain roads always have the same weather.
✓ Weather, visibility, and road conditions can change quickly.
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
Why does higher speed increase the risk of aquaplaning?

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

The suspension becomes less effective at high speed.
The brakes cannot remove water from the tyres.
✓ The tyres have less time to clear water from the road surface.
Higher speed increases the tyre pressure.

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
What should you do when traffic lights change to amber as you approach?

65. What should you do when traffic lights change to amber as you approach?

✓ Stop if you can do so safely.
Stop even if this requires sudden harsh braking.
Treat it like a green light until it turns red.
Continue at the same speed if the junction looks clear.

An amber light warns that the signal is changing. Stop if it is safe, but avoid sudden braking that could cause danger behind you.

Vehicle approaching an amber traffic light
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does this dashboard symbol indicate?

66. What does this dashboard symbol indicate?

Windscreen washer.
Air conditioning.
Air recirculation.
✓ Rear window demister.

This symbol indicates the rear window demister. It heats the rear window to help clear condensation, mist or frost and improve visibility.

Rear-window demister symbol on the dashboard
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you keep a safe following distance?

67. Why should you keep a safe following distance?

To make your vehicle easier to see ahead.
✓ To have enough time to stop.
To make overtaking easier.
To reduce wear on the brakes.

A safe following distance gives you enough time to react if the vehicle in front slows down or stops suddenly.

Gap between a vehicle and the traffic ahead
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should a seat belt not be twisted when worn?

68. Why should a seat belt not be twisted when worn?

A flat belt makes the seat easier to adjust.
A twisted belt can cause the buckle to open.
A twisted belt makes the brakes less effective.
✓ A flat belt spreads collision forces more effectively.

A seat belt should lie flat against the body without twists. A twisted belt concentrates force over a smaller area and may provide less effective protection in a collision.

Twisted seat belt across an occupant's body
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do after hitting an animal with your vehicle?

69. What should you do after hitting an animal with your vehicle?

✓ Stop safely, warn other traffic, and seek appropriate help.
Continue driving if the vehicle still works.
Leave the scene and report it later.
Approach the animal immediately.

After an animal collision, stop in a safe place if possible and protect yourself and other road users from further danger. Do not approach an injured or frightened animal unless it is safe to do so. Contact the appropriate police, road authority, animal service, or emergency service as required by the situation and local rules.

Vehicle stopped after a collision with an animal
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if you are dazzled by low sun?

70. What should you do if you are dazzled by low sun?

Follow the vehicle ahead closely as a guide.
Maintain your speed if you can still see the road markings.
Look only at the road immediately in front of you.
✓ Slow down and use the sun visor if needed.

Low sun can greatly reduce visibility. Slow down, increase your safety margin, and use the sun visor or sunglasses if needed.

Low sunlight dazzling a driver
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you not use water on a fire involving live electrical equipment?

71. Why should you not use water on a fire involving live electrical equipment?

Water makes electrical cables harder to disconnect.
✓ Water can conduct electricity and create an electric-shock hazard.
Water can make the electrical equipment restart.
Water can cause the battery to charge more quickly.

Do not use water on a fire involving energised electrical equipment, because water can conduct electricity and create a serious electric-shock hazard. Keep clear, disconnect the power only if it is safe to do so, and call the emergency services. Use only a suitable fire extinguisher if it is safe and you know how to use it.

Fire involving live electrical equipment
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What makes up the total stopping distance of a vehicle?

72. What makes up the total stopping distance of a vehicle?

Visibility distance and reaction distance.
Braking distance and overtaking distance.
✓ Reaction distance and braking distance.
Tyre distance and braking distance.

The total stopping distance consists of the distance travelled while the driver reacts to a hazard plus the distance travelled while the vehicle is braking to a stop.

Reaction and braking distances before a vehicle stops
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do when your view is blocked at a junction?

73. What should you do when your view is blocked at a junction?

Sound your horn and enter the junction.
✓ Slow down and proceed carefully.
Drive through quickly before other traffic appears.
Follow the vehicle ahead without checking yourself.

If your view is blocked, slow down and make sure the way is clear before entering the junction.

Restricted view of approaching traffic at a junction
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you take extra care when crossing a tram or bus lane?

74. Why should you take extra care when crossing a tram or bus lane?

You only need to check for traffic from one direction.
These lanes are usually free from moving traffic.
✓ A tram or bus may approach quickly.
Trams and buses must always stop before crossings.

Check carefully before crossing or entering a tram or bus lane. Trams cannot steer around obstacles, and both trams and buses may need significant distance to stop.

Traffic crossing a lane used by public transport
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you avoid braking hard on a curve?

75. Why should you avoid braking hard on a curve?

✓ It can reduce control and increase the risk of skidding.
It can make the tyres grip the road more strongly.
It can make the steering feel heavier.
It can increase tyre pressure during the turn.

Hard braking on a curve can upset the vehicle's balance and reduce grip. Slow down before the curve and steer smoothly.

Vehicle braking while negotiating a bend
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
It is safer to drive faster than the speed limit when overtaking.

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

True.
✓ False.

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
Which vehicles are especially vulnerable to strong crosswinds?

77. Which vehicles are especially vulnerable to strong crosswinds?

Vehicles without winter tyres.
✓ High-sided vehicles such as trucks, buses, and vans.
Vehicles with full fuel tanks.
Low, heavily loaded vehicles.

High-sided vehicles can be pushed sideways because of their large side area. Cyclists and motorcyclists can also be strongly affected by sudden gusts.

High-sided vehicle exposed to crosswinds
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if your vehicle breaks down on a busy road?

78. What should you do if your vehicle breaks down on a busy road?

Stay close to the vehicle so other drivers can see you.
Remain in the traffic lane even if you can move to safety.
Sound the horn continuously to warn other drivers.
✓ Move to a safe place, use hazard lights, and stay clear of traffic.

If your vehicle breaks down, make it visible and get yourself away from moving traffic. Safety comes before repairing the vehicle.

Broken-down vehicle beside a busy road
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should cyclists avoid riding in a large vehicle's blind spot?

79. Why should cyclists avoid riding in a large vehicle's blind spot?

✓ The driver may not be able to see them.
Blind spots matter only when a vehicle is reversing.
The driver can always hear a cyclist beside the vehicle.
Large vehicles always have priority when turning.

Buses and trucks have large areas where the driver cannot see cyclists, especially beside the vehicle and near turns.

Cyclist in a large vehicle's blind spot
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do when traffic is merging from another lane?

80. What should you do when traffic is merging from another lane?

Maintain your speed and expect them to merge behind you.
Move into another lane without checking around you.
✓ Adjust your speed and leave space when safe.
Speed up slightly so they can merge behind you.

When traffic merges, good observation and speed control help vehicles join safely without sudden braking or conflict.

Vehicle merging from an adjacent lane
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you use a lower gear when driving downhill?

81. Why should you use a lower gear when driving downhill?

It increases tyre grip on steep roads.
✓ It helps control speed using engine braking.
It makes the steering lighter on descents.
It allows the vehicle to coast more freely.

Engine braking helps prevent the vehicle from gaining too much speed and reduces strain on the brakes.

Lower-gear selection for a downhill road
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
When should you consider delaying a journey because of severe weather?

82. When should you consider delaying a journey because of severe weather?

Only when roads are closed.
✓ When conditions make driving unsafe.
Whenever the weather forecast mentions rain.
Only when your vehicle has no winter tyres.

Severe weather can create dangerous conditions. Delaying a journey may be the safest choice when risks are too high.

Severe weather making a road journey hazardous
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if one of your tyres suddenly bursts while driving?

83. What should you do if one of your tyres suddenly bursts while driving?

Pump the brake pedal repeatedly.
Accelerate briefly to stabilise the vehicle.
Release the steering wheel and let the vehicle slow itself.
✓ Hold the steering wheel firmly and slow down gradually.

A tyre burst can make the vehicle unstable. Hold the wheel firmly, avoid sudden braking or steering, and slow down gradually.

Vehicle tyre damaged by a sudden blowout
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you leave extra space behind a vehicle carrying animals?

84. Why should you leave extra space behind a vehicle carrying animals?

Because they cannot use brake lights.
Because they cannot use their horn.
Because they must always travel in the centre of the road.
✓ Because it may move slowly or stop unexpectedly.

Vehicles transporting animals may accelerate slowly, take bends carefully, or brake gently to protect their load.

Vehicle following an animal transporter
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should a child use a suitable child restraint?

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

To allow the child to sit closer to the window.
To make the seat belt more comfortable.
✓ To reduce the risk of serious injury in a collision.
To make it easier for the child to sleep.

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

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

It applies the parking brake.
It locks the steering.
It increases tyre pressure.
✓ 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 should you do if a trailer begins to sway?

87. What should you do if a trailer begins to sway?

Accelerate to pull the trailer straight.
✓ Ease off the accelerator and reduce speed smoothly.
Move into another lane to create more space.
Brake hard as soon as the sway begins.

Sudden steering or braking can worsen trailer sway. Stay calm, hold a steady course, and reduce speed smoothly.

Trailer swaying behind a towing vehicle
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does this dashboard symbol indicate?

88. What does this dashboard symbol indicate?

Adaptive cruise control.
Parking assistance.
✓ Lane-departure warning.
Electronic stability control.

This symbol relates to the lane-departure warning or lane-keeping system. The system monitors the vehicle's position within its lane and may warn the driver if the vehicle begins to leave the lane unintentionally.

Lane-departure warning symbol on the dashboard
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Which colour combination is commonly used for warning signs in Thailand?

89. Which colour combination is commonly used for warning signs in Thailand?

✓ Black border with yellow background.
Red border with yellow background.
Blue border with white background.
Red border with white background.

Most warning signs in Thailand have a black border with a yellow background.

Colour combinations used for road warning signs
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Should the legal alcohol limit be treated as a safe target?

90. Should the legal alcohol limit be treated as a safe target?

Yes, if you know exactly how much you have drunk.
✓ No, impairment can begin before the legal limit is reached.
Yes, if you feel completely sober.
Yes, because impairment begins only above the limit.

A legal limit is an enforcement threshold, not a recommended drinking level. Even a small amount of alcohol can affect driving performance.

Alcohol consumption and the limits of safe driving
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does this vehicle-control symbol indicate?

91. What does this vehicle-control symbol indicate?

Dipped headlights.
✓ Interior lighting.
Parking lights.
Instrument-panel brightness.

This control operates the vehicle's interior lighting. Depending on the vehicle, the lights can be switched on manually or set to illuminate automatically when a door is opened.

Control for the vehicle's interior lighting
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Are bicycle helmets generally required in Thailand?

92. Are bicycle helmets generally required in Thailand?

✓ No.
Yes, for all adults.
Yes, for all cyclists.

Bicycle helmets are not generally required for all cyclists in Thailand, although specific age or regional rules may apply.

Cyclist wearing a bicycle helmet
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you expect when leaving a tunnel in bright sunlight?

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

The road surface becoming more slippery.
The brakes becoming more powerful.
✓ Temporary glare and reduced visibility.
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
What should you do if a vehicle is reversing near you?

94. What should you do if a vehicle is reversing near you?

Stand close behind it so the driver can see you.
Cross behind it once the driver looks forward.
✓ Stay clear and make sure the driver can see you.
Walk behind it if it is reversing slowly.

Reversing vehicles have blind spots. Stay away from the vehicle and make sure the driver can see you.

Pedestrian near a reversing vehicle
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you avoid blocking a junction?

95. Why should you avoid blocking a junction?

✓ Other traffic needs space to move safely.
Traffic lights may stop working.
Junctions may only be entered at low speed.
Vehicles in a junction lose priority.

Blocking a junction can prevent vehicles, cyclists, or pedestrians from moving safely. Enter only when there is enough space to drive through and clear the junction.

Traffic blocking a road junction
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why must luggage or other objects not obstruct the driver's view?

96. Why must luggage or other objects not obstruct the driver's view?

They can make the steering heavier.
✓ They can hide hazards and reduce the driver's ability to see safely.
They can increase tyre pressure.
They can increase the vehicle's braking distance.

The driver must have a clear view of the road and surroundings. Luggage, decorations, or other objects that obstruct the windscreen, windows, or mirrors can hide pedestrians, cyclists, vehicles, signs, or other hazards.

Luggage obstructing the driver's view
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why is it dangerous to drive through standing water at speed?

97. Why is it dangerous to drive through standing water at speed?

The brakes become more effective when wet.
✓ The tyres may lose contact with the road.
The water can increase tyre pressure.
The suspension becomes firmer at higher speed.

Driving too fast through water can cause aquaplaning, where the tyres lose grip and the driver may lose control.

Vehicle travelling through standing water
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you keep a safe distance from cyclists?

98. Why should you keep a safe distance from cyclists?

Cyclists must move aside whenever a vehicle approaches.
Cyclists always have priority over other traffic.
✓ They may need space to avoid obstacles.
Cyclists cannot signal before changing direction.

Cyclists may need to move around potholes, parked cars, or drains. Giving them enough space helps prevent dangerous situations.

Lateral clearance between a vehicle and a cyclist
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if illness affects your ability to drive safely?

99. What should you do if illness affects your ability to drive safely?

Drive slowly and avoid busy roads.
✓ Do not drive until you are fit to do so.
Ask a passenger to watch the road for you.
Open a window to help you stay alert.

Illness can reduce concentration, alertness, coordination, or reaction time. If you do not feel fit to drive safely, postpone the journey or use another form of transport.

Driver feeling unwell before a journey
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if another road user makes a mistake?

100. What should you do if another road user makes a mistake?

✓ Stay calm and avoid creating more danger.
Immediately overtake them to get past the situation.
Drive closer so they notice your presence.
Use your horn repeatedly to express your frustration.

Road users can make mistakes. Staying calm and reacting safely helps prevent crashes.

Driver responding to another road user's mistake
AI-generated by Traffic-rules.com • WCIT • CC BY-SA