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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
Why should you notice the location of emergency exits in a tunnel?

251. Why should you notice the location of emergency exits in a tunnel?

Pedestrians may be crossing near them.
✓ You may need to reach one quickly during an emergency.
They mark areas where vehicles may stop temporarily.
They show where overtaking is prohibited.

Knowing where emergency exits and refuge areas are located can save valuable time during a fire, collision, or evacuation.

Emergency exit inside a road tunnel
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you check shortly after securing a load?

252. What should you check shortly after securing a load?

Increase speed briefly to test the restraints.
✓ Stop safely and check that the restraints are still tight.
Loosen the restraints slightly after the load has settled.
Assume the load is secure once the journey has started.

Loads and straps may settle or loosen after the journey begins. Recheck them at a safe stopping place.

Rechecking straps securing a vehicle's load
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if your headlights fail while driving at night?

253. What should you do if your headlights fail while driving at night?

Follow another vehicle closely for visibility.
✓ Reduce speed and stop safely using any remaining lights or hazard lights.
Continue slowly if the road is well lit.
Use hazard lights and continue to your destination.

Without effective headlights, you may not see hazards and other road users may not see you. Stop in a safe location as soon as possible.

Vehicle with failed headlights at night
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does this dashboard symbol indicate?

254. What does this dashboard symbol indicate?

Air recirculation.
Windscreen washer.
Air conditioning.
✓ Front windscreen demister.

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

255. 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 make the road extremely slippery.
It can make the road surface much softer.

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

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

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

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 black ice?

257. What is black ice?

Snow mixed with road dirt.
Ice that forms only during darkness.
Frozen mud covering the road surface.
✓ A thin, often transparent layer of ice that can be difficult to see.

Black ice is difficult to detect because the road surface may look merely wet. It can cause a sudden and severe loss of grip.

Thin ice covering a road surface
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does pulling the lighting stalk towards you normally do?

258. What does pulling the lighting stalk towards you normally do?

Activate the direction indicators.
Switch on the dipped headlights.
✓ Flash the main-beam headlights.
Switch on the front fog lights.

Pulling the lighting stalk towards you normally flashes the main-beam headlights. This briefly illuminates the main beam while the stalk is held or operated.

Lighting stalk used to flash the main-beam headlights
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you normally do before selecting D or R in an automatic vehicle?

259. What should you normally do before selecting D or R in an automatic vehicle?

Press the accelerator pedal.
Apply the parking brake only.
Switch off the engine.
✓ Press and hold the brake pedal.

Before selecting D (Drive) or R (Reverse), keep the brake pedal pressed to prevent the vehicle from moving unexpectedly when the gear is engaged.

Holding the brake before selecting an automatic driving gear
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should hard braking be avoided while a motorcycle is leaning in a bend?

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

✓ It can reduce stability and available tyre grip.
It increases tyre pressure immediately.
It prevents the suspension from working.
It can make the engine overheat.

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 should you do if fog becomes so thick that you cannot see safely?

261. What should you do if fog becomes so thick that you cannot see safely?

Stop immediately in the traffic lane.
Follow the vehicle ahead closely for guidance.
Use main beam and keep driving.
✓ Slow down and stop in a safe location away from traffic if necessary.

If visibility becomes dangerously poor, find a safe place to stop rather than continuing without being able to see clearly.

Dense fog obscuring the road ahead
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you avoid selecting N while driving downhill in an automatic vehicle?

262. Why should you avoid selecting N while driving downhill in an automatic vehicle?

It increases engine braking.
It automatically selects a lower gear.
It applies the parking brake.
✓ It reduces engine braking and vehicle control.

Selecting N (Neutral) while driving downhill disconnects the engine from the driven wheels, reducing engine braking. Keep an appropriate drive or gear selected so you can maintain better control of the vehicle.

Neutral selection and downhill coasting in an automatic vehicle
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if the brake pedal feels unusually soft?

263. What should you do if the brake pedal feels unusually soft?

Continue until the brakes begin making noise.
Use only the parking brake while driving.
Reduce the tyre pressure to improve braking.
✓ Stop safely and have the braking system inspected.

A soft brake pedal or increased stopping distance may indicate a serious brake fault. Do not continue driving normally until the system has been checked.

Brake-pedal check for a possible braking fault
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does this vehicle-control symbol indicate?

264. What does this vehicle-control symbol indicate?

Air recirculation.
Windscreen demisting.
✓ Cabin fan speed.
Air conditioning.

This control adjusts the cabin ventilation fan speed. Increasing the setting moves more air through the vehicle's ventilation and climate-control system.

Control for adjusting the cabin fan speed
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
How should you normally brake on a motorcycle?

265. How should you normally brake on a motorcycle?

Use only the front brake.
Alternate between the front and rear brakes.
✓ Use both brakes smoothly and progressively.
Use only the rear brake.

During normal braking, use both the front and rear brakes smoothly and progressively. The front brake normally provides much of the braking force, while the rear brake also helps slow and stabilise the motorcycle. Sudden or poorly balanced braking can reduce stability or cause a wheel to lose grip.

Motorcyclist using the front and rear brakes
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if an unusual vibration develops in the steering wheel?

266. What should you do if an unusual vibration develops in the steering wheel?

Increase speed until the vibration becomes less noticeable.
Hold the steering wheel more tightly and continue.
Reduce the tyre pressure slightly to smooth the ride.
✓ Reduce speed and have the tyres, wheels, and steering checked.

An unusual vibration may indicate tyre damage, wheel imbalance, loose components, or another mechanical fault. Reduce speed and arrange an inspection.

Driver experiencing vibration through the steering wheel
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you avoid removing the coolant cap while the engine is hot?

267. Why should you avoid removing the coolant cap while the engine is hot?

The thermostat may become damaged.
The cooling fan could stop working.
The coolant level may become harder to read.
✓ Pressurised hot coolant may escape and cause serious burns.

A hot cooling system may remain under pressure. Allow the engine to cool and follow the manufacturer's instructions before checking or adding coolant.

Coolant cap and the risk of hot pressurised coolant
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you avoid using a phone while driving?

268. Why should you avoid using a phone while driving?

Because it can make your reactions faster.
Because it can disable the cruise control system.
Because it can cause road rage.
✓ Because it distracts you from the road.

Using a phone while driving reduces attention, reaction time, and control of the vehicle. A hands-free system may reduce the need to handle the phone, but the conversation itself can still be distracting.

Phone distracting a driver from the road
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Where should passengers wait after safely leaving a broken-down vehicle?

269. Where should passengers wait after safely leaving a broken-down vehicle?

Wait close beside the vehicle where drivers can see you.
Stand between the vehicle and the safety barrier.
✓ In a protected place well away from moving traffic.
Wait in the traffic lane until help arrives.

Move passengers, children, and pets away from the carriageway. On high-speed roads, wait behind a safety barrier where possible.

Passengers moving away from a broken-down vehicle
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
How may drivers normally use a phone while driving in Thailand?

270. How may drivers normally use a phone while driving in Thailand?

Only for texting.
Either handheld or hands-free.
Handheld.
✓ Hands-free.

When phone use while driving is permitted in Thailand, drivers must generally use a hands-free system rather than holding the phone.

Hands-free phone use inside a vehicle
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does this vehicle-control symbol indicate?

271. What does this vehicle-control symbol indicate?

Bonnet release.
Central door locking.
Parking brake.
✓ Fuel-filler flap release.

This control releases the fuel-filler flap, allowing access to the vehicle's fuel filler.

Release control for the fuel-filler flap
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does this vehicle-control symbol indicate?

272. What does this vehicle-control symbol indicate?

Air recirculation.
Fan speed.
✓ Air conditioning.
Front windscreen demister.

The A/C symbol controls the vehicle's air-conditioning system. Air conditioning can cool and dehumidify the air inside the vehicle, which can also help clear mist from the windows.

Air-conditioning control with the A/C symbol
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Which selector position is used when parking the vehicle?

273. Which selector position is used when parking the vehicle?

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

Select P (Park) when parking an automatic vehicle. Park locks the transmission, but the parking brake should also be applied to secure the vehicle.

Automatic gear selector with P, R, N and D positions
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do when the road is covered with snow or ice?

274. What should you do when the road is covered with snow or ice?

Brake firmly in bends to keep control.
Drive at the normal speed limit if the road looks clear.
✓ Reduce speed, increase following distance, and drive gently.
Use quick steering movements if the vehicle starts to slide.

Snow and ice greatly reduce tyre grip. Lower speed, extra distance, and gentle steering, braking, and acceleration help maintain control.

Vehicle travelling on a snow-covered road
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What may happen to the steering when the ignition key is removed?

275. What may happen to the steering when the ignition key is removed?

The power steering remains fully active.
The wheels automatically straighten.
✓ The steering lock may engage.
The steering becomes lighter.

On vehicles fitted with a steering lock, removing the ignition key may allow the steering lock to engage. Never remove the key while the vehicle is moving.

Ignition key and vehicle steering lock
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does this dashboard symbol indicate?

276. What does this dashboard symbol indicate?

Brake-system warning.
Charging-system warning.
Power-steering warning.
✓ Airbag system warning.

This symbol indicates a possible fault in the airbag or supplementary restraint system. If it remains illuminated while driving, the system should be checked because one or more airbags or seat-belt pretensioners may not operate correctly in a collision.

Airbag-system warning 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?

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

Maintain your speed until someone starts crossing.
Drive through if the pedestrians are still waiting.
Sound your horn so pedestrians wait.
✓ Slow down and stop if they want to cross.

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
How should a cyclist react to a pothole?

278. How should a cyclist react to a pothole?

Keep your speed and pass as close as possible.
Brake hard just before reaching the pothole.
✓ Check surroundings, reduce speed, and avoid it smoothly.
Swerve around it as soon as you notice it.

Sudden swerving can place you in the path of traffic. Check your surroundings and change direction gradually.

Cyclist approaching a pothole
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does this vehicle-control symbol indicate?

279. What does this vehicle-control symbol indicate?

✓ Driving mode selection.
Four-wheel drive.
Parking assistance.
Cruise control.

This control selects a driving mode. Depending on the vehicle, different modes can alter characteristics such as accelerator response, steering assistance, transmission behaviour or energy use.

Selector for the vehicle's driving modes
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if you feel tired while driving?

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

✓ Stop in a safe place and take a break.
Turn up the radio to stay alert.
Open a window and continue driving.
Drive faster to reach your destination sooner.

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 should you do if exhaust fumes begin entering the car?

281. What should you do if exhaust fumes begin entering the car?

Open the windows and continue to your destination.
✓ Open the windows, stop safely, leave the vehicle, and seek assistance.
Ignore the fumes if no warning lights appear.
Switch the ventilation to recirculation and keep driving.

Exhaust gases may contain carbon monoxide, which is poisonous and may not be visible. The exhaust system should be inspected before the vehicle is used again.

Vehicle exhaust fumes and cabin ventilation
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you remember when using driver-assistance systems?

282. What should you remember when using driver-assistance systems?

You only need to intervene when a warning appears.
The systems can always detect every hazard.
You may stop watching the road when they are active.
✓ You remain responsible and must stay alert.

Driver-assistance systems can help with tasks such as maintaining speed, monitoring lanes, or warning about hazards, but they do not replace the driver. Stay attentive, monitor the road and traffic, and be ready to take control whenever necessary.

Driver monitoring the road while using driver assistance
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
How can strong crosswinds affect a vehicle towing a trailer?

283. How can strong crosswinds affect a vehicle towing a trailer?

They affect only the towing vehicle, not the trailer.
They improve tyre grip on exposed roads.
✓ They can push the trailer sideways and reduce stability.
They make the trailer more stable at higher speeds.

Trailers have large side surfaces and may be affected strongly by wind, especially on bridges and exposed roads.

Vehicle and trailer exposed to crosswinds
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does the AUTO setting on the lighting control do?

284. What does the AUTO setting on the lighting control do?

It keeps the main beam switched on.
✓ It switches the headlights on or off automatically when needed.
It switches on the hazard warning lights.
It flashes the headlights automatically.

The AUTO lighting setting allows the vehicle to switch its exterior lights on or off automatically according to ambient light conditions. The driver remains responsible for ensuring that the correct lights are being used.

AUTO setting on the vehicle's lighting control
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What is the button on a manual handbrake lever used for?

285. What is the button on a manual handbrake lever used for?

To unlock the steering.
To select reverse gear.
✓ To release the handbrake mechanism.
To apply the service brakes.

To release a manual handbrake, pull the lever up slightly, press and hold the release button, then lower the lever under control.

Release button on a manual handbrake lever
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why can bridges and overpasses become icy before nearby roads?

286. Why can bridges and overpasses become icy before nearby roads?

✓ Cold air circulates above and below them.
Bridges are always at a higher altitude.
Their barriers trap cold air on the road surface.
Traffic usually moves faster across bridges.

Bridges lose heat from both their upper and lower surfaces, so they can freeze before roads built directly on the ground.

Icy surface on an exposed bridge
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if there is no pavement?

287. What should you do if there is no pavement?

Pay attention only to traffic approaching from behind.
Walk close to traffic so drivers can see you.
✓ Walk where you can be seen and stay alert.
Choose the side with the smoothest road surface.

If there is no pavement, stay as far from traffic as possible and remain alert. The exact side of the road depends on local traffic rules.

Pedestrian walking beside a road without a pavement
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What is the main safety risk of aggressive driving?

288. What is the main safety risk of aggressive driving?

✓ It increases the risk of crashes.
It can increase fuel consumption.
It may attract the attention of the police.
It can increase tyre and brake wear.

Aggressive driving, such as tailgating, speeding, or sudden lane changes, reduces safety margins and increases the risk of crashes and conflict with other road users.

Driver displaying aggressive behaviour in traffic
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
You should always wear a seat belt, even on short trips.

289. You should always wear a seat belt, even on short trips.

False.
✓ True.

Seat belts reduce the risk of serious injury and should be worn on every trip, even short ones.

Driver wearing a seat belt for a car journey
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if your vehicle breaks down inside a road tunnel?

290. What should you do if your vehicle breaks down inside a road tunnel?

✓ Move aside if possible, use hazard lights, and call for assistance.
Stay in the traffic lane and wait without using hazard lights.
Reverse toward the tunnel entrance if traffic is light.
Leave the vehicle and walk along the road to find help.

If possible, stop in an emergency bay or another safe place and use the hazard lights. Contact tunnel control using an emergency telephone or other available assistance system, and follow the tunnel signs and instructions.

Broken-down vehicle inside a road tunnel
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should happen after an airbag has deployed?

291. What should happen after an airbag has deployed?

The airbag can be reused if it is not torn.
Only the airbag warning light needs to be reset.
The airbag can be removed and the vehicle used normally.
✓ The restraint system should be professionally inspected and repaired.

A deployed airbag is a single-use safety component. After deployment, the restraint system should be professionally inspected and the airbag and any other affected components replaced or repaired as required before the system is relied upon again.

Deployed airbag inside a vehicle
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does this dashboard symbol indicate?

292. What does this dashboard symbol indicate?

Front fog lights.
Rear fog lights.
Sidelights.
✓ Dipped headlights.

This symbol indicates that the dipped headlights are switched on. Dipped headlights illuminate the road ahead while limiting glare for other road users.

Dipped-headlight symbol on the dashboard
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you consider before selecting a lower gear in a manual vehicle?

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

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

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
Why should you check your mirrors before braking?

294. Why should you check your mirrors before braking?

✓ To know what is happening behind you.
To decide which gear to use while slowing down.
To shorten the distance needed to stop.
To check whether the road surface is slippery.

Checking your mirrors helps you understand what is happening behind you and anticipate how following traffic may react. In an emergency, do not delay necessary braking.

Driver checking following traffic before braking
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does this vehicle-control symbol indicate?

295. What does this vehicle-control symbol indicate?

Cabin temperature adjustment.
Air recirculation.
Air conditioning.
✓ Airflow direction.

This control selects the direction of the ventilation airflow, such as towards the face, feet or windscreen.

Control for directing cabin ventilation airflow
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should cyclists do before turning or changing position on the road?

296. What should cyclists do before turning or changing position on the road?

Signal only when a vehicle is close behind.
Signal and turn without checking behind.
✓ Look behind, signal clearly, and move only when safe.
Move first, then signal to traffic behind.

Checking behind and signalling gives other road users time to understand what you intend to do.

Cyclist preparing to turn or change road position
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does this vehicle-control symbol indicate?

297. What does this vehicle-control symbol indicate?

Electric window control.
Child safety lock.
✓ Window lock.
Mirror adjustment.

This control activates the window lock, which normally prevents passengers from operating their electric windows while leaving control with the driver.

Lock switch for passenger window controls
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if traffic stops inside a tunnel?

298. What should you do if traffic stops inside a tunnel?

✓ Stop at a safe distance and follow signals or instructions.
Make a U-turn and leave the tunnel.
Reverse toward the tunnel entrance.
Sound the horn continuously until traffic moves.

Remain calm, keep space from the vehicle ahead, and obey traffic signals, signs, or instructions from tunnel staff.

Traffic stopped inside a road tunnel
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if traffic suddenly slows on a motorway?

299. What should you do if traffic suddenly slows on a motorway?

Maintain speed until the vehicle ahead brakes.
Change lanes immediately to avoid slowing down.
Move onto the shoulder and continue driving.
✓ Slow down smoothly and warn traffic behind if needed.

When traffic slows suddenly, reduce speed smoothly, keep a safe distance, and use hazard lights if needed to warn following traffic.

Motorway traffic slowing ahead
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you avoid sudden braking when it is not necessary?

300. Why should you avoid sudden braking when it is not necessary?

It causes the tyres to lose pressure.
It prevents the brake lights from working properly.
It makes the steering less responsive afterwards.
✓ Vehicles behind may not have time to react.

Sudden braking can surprise drivers behind you and increase the risk of a rear-end collision.

Following traffic and the risk of sudden braking
AI-generated by Traffic-rules.com • WCIT • CC BY-SA