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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 should a motorcyclist do when approaching loose gravel?

201. What should a motorcyclist do when approaching loose gravel?

Accelerate sharply to cross it quickly.
Brake hard while riding over it.
✓ Reduce speed before reaching it and use smooth controls.
Turn suddenly to avoid every loose stone.

Loose gravel can significantly reduce tyre grip. Reduce speed before reaching it, keep the motorcycle as upright as practical, and avoid sudden braking, acceleration or steering while crossing the loose surface.

Motorcyclist approaching loose gravel
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if a seat belt is frayed or damaged?

202. What should you do if a seat belt is frayed or damaged?

Twist the damaged section so it cannot tear further.
Wear the belt loosely to reduce strain on it.
✓ Have it inspected and replaced before relying on it.
Use it normally if the buckle still locks.

A damaged seat belt may not provide proper protection in a collision. Frayed webbing, damaged buckles, faulty retractors, or other defects should be professionally inspected and repaired or replaced before the seat belt is relied upon.

Frayed or damaged seat-belt webbing
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if your vehicle becomes stuck on a railway crossing?

203. What should you do if your vehicle becomes stuck on a railway crossing?

Try to restart the vehicle until help arrives.
Move everyone beside the vehicle while waiting.
Walk along the tracks to look for help.
✓ Get everyone out, move away, and contact the emergency services.

Move everyone well away from the tracks. Use the crossing emergency telephone or displayed contact information where available, or contact the emergency services immediately.

Vehicle stranded on a railway crossing
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if a red warning light appears with an unusual noise?

204. What should you do if a red warning light appears with an unusual noise?

Stop only if another warning light appears.
Ignore the noise if the warning light later goes out.
Wait until the next service to have it checked.
✓ Stop safely, switch off the engine, and seek assistance.

A red warning combined with an unusual noise may indicate a serious fault. Continuing could cause damage or loss of control.

Red dashboard warning requiring the driver's attention
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does this dashboard symbol indicate?

205. What does this dashboard symbol indicate?

Electronic stability control.
✓ Low tyre pressure.
Brake-system warning.
Engine-management warning.

This symbol indicates that one or more tyres may have low pressure. Check the tyre pressures and inspect the tyres for damage or a puncture.

Tyre-pressure warning symbol on the dashboard
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you leave extra space behind a motorcycle?

206. Why should you leave extra space behind a motorcycle?

Motorcycles need less space to stop than cars.
Motorcyclists cannot see vehicles directly behind them.
Following closely makes it easier to overtake safely.
✓ Motorcycles can slow down quickly and are more vulnerable.

Motorcyclists are more exposed than car drivers. Extra following distance gives you more time to react safely.

Following distance behind a motorcycle
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does this vehicle-control symbol indicate?

207. What does this vehicle-control symbol indicate?

Hazard warning lights.
✓ Horn.
Cruise control.
Parking assistance.

This symbol indicates the horn control. The horn is used to warn other road users of your presence when necessary.

Vehicle horn control and symbol
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
How should a passenger normally sit on a motorcycle?

208. How should a passenger normally sit on a motorcycle?

✓ Securely on the passenger seat with both feet on the footrests.
Sideways so they can get off more easily.
With one foot hanging down when travelling slowly.
Standing on the footrests when the road is uneven.

A motorcycle passenger should sit securely on the designated passenger seat, keep both feet on the footrests and avoid sudden movements that could affect the motorcycle's balance and stability.

Passenger seated on a motorcycle with feet on the footrests
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do about a chip in the windscreen?

209. What should you do about a chip in the windscreen?

Cover the chip so it cannot spread.
✓ Have it assessed and repaired promptly.
Clean the glass and continue driving normally.
Wait until the chip becomes a larger crack.

A chip can obstruct your view, weaken the glass, and develop into a larger crack. Have it checked and repaired promptly.

Stone chip in a vehicle's windscreen
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you be careful when driving beside a bus at a stop?

210. Why should you be careful when driving beside a bus at a stop?

The road surface is usually more slippery near bus stops.
Bus stops usually have a lower speed limit.
✓ Passengers may step out or cross near the bus.
Vehicles beside a bus must always stop and wait.

Stopped buses can hide pedestrians, and passengers may cross unexpectedly. Slow down and be ready to react.

Vehicle passing a bus at a stop
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Which factors can increase a vehicle's stopping distance?

211. Which factors can increase a vehicle's stopping distance?

✓ Higher speed, slower reactions, poor grip, and vehicle condition.
Using dipped headlights and keeping the windows closed.
Lower speed, dry roads, and good tyres.
Having a full fuel tank and adjusted mirrors.

Stopping distance can increase because of higher speed, slower driver reactions, reduced tyre grip, poor weather or road conditions, worn tyres, weak brakes, or a heavier vehicle. Both the driver's reaction distance and the vehicle's braking distance can be affected.

Road and vehicle conditions affecting stopping distance
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should a motorcyclist avoid riding in another vehicle's blind spot?

212. Why should a motorcyclist avoid riding in another vehicle's blind spot?

✓ The driver may not be able to see the motorcycle.
The motorcycle's brakes may become less effective.
The motorcycle will use more fuel.
The motorcycle's indicators may be harder to see.

Motorcycles can be difficult to see, particularly when they remain in another vehicle's blind spot. Avoid staying alongside a vehicle where the driver may not see you, and choose a position where you are more likely to be visible.

Motorcycle in another vehicle's blind spot
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if it is unsafe to leave a stranded vehicle?

213. What should you do if it is unsafe to leave a stranded vehicle?

Try to push the vehicle out of the traffic lane.
✓ Stay inside, use hazard lights, and call the emergency services.
Leave the vehicle and wait beside it for help.
Walk along the road to find assistance.

If leaving the vehicle would put you in greater danger, remain restrained, make the vehicle visible, contact the emergency services, and follow their instructions.

Vehicle stranded among moving traffic
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Which selector position prevents drive being transmitted to the wheels?

214. Which selector position prevents drive being transmitted to the wheels?

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

Select N (Neutral) when drive should not be transmitted to the wheels. Unlike Park, Neutral does not lock the transmission to prevent the vehicle from rolling.

Automatic gear selector with P, R, N and D positions
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do with a manual parking brake before driving away?

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

Leave it partly applied.
Apply it only after moving off.
✓ Release it fully.
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
What should you do if the engine-temperature warning shows overheating?

216. What should you do if the engine-temperature warning shows overheating?

Open the coolant cap immediately to release heat.
Increase engine speed to improve coolant circulation.
Ignore it if the engine still sounds normal.
✓ Stop safely, switch off the engine, and allow it to cool.

Continuing to drive an overheating vehicle can cause severe damage. Allow the engine to cool and follow the manufacturer's instructions.

Engine-overheating warning on the dashboard
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you take regular breaks during a long journey?

217. Why should you take regular breaks during a long journey?

✓ To help prevent fatigue and maintain concentration.
To allow the engine to cool down.
To improve fuel quality.
To reduce tyre pressure.

Regular breaks during a long journey help reduce fatigue and maintain concentration. Do not wait until you are struggling to stay awake before stopping to rest.

Driver resting during a long journey
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Can coffee, energy drinks, fresh air, or loud music replace proper rest when you are tired?

218. Can coffee, energy drinks, fresh air, or loud music replace proper rest when you are tired?

Yes, but only during daylight.
Yes, if the journey is less than one hour.
Only coffee can replace proper rest.
✓ No, they may only increase alertness temporarily.

Coffee, energy drinks, fresh air, or loud music may make you feel more alert for a short time, but they do not remove fatigue. If you are too tired to drive safely, stop somewhere safe and get proper rest.

Stimulant drinks and driver tiredness
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
How can unnecessary weight affect a vehicle's energy use?

219. How can unnecessary weight affect a vehicle's energy use?

It reduces aerodynamic drag.
It makes the vehicle easier to accelerate.
It improves braking efficiency.
✓ It can increase the energy needed to move the vehicle.

Extra weight generally requires more energy when accelerating and climbing. Removing unnecessary heavy items can help reduce fuel or energy consumption while keeping all essential equipment in the vehicle.

Extra luggage adding weight to a vehicle
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why is it important to make yourself visible at night?

220. Why is it important to make yourself visible at night?

To ensure drivers can always stop in time.
To make drivers give way wherever you cross.
✓ To make drivers see you more easily.
To avoid checking for approaching vehicles.

Bright or reflective clothing helps drivers notice pedestrians in low-light conditions.

Pedestrian visibility beside a road at night
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do before entering a roundabout?

221. What should you do before entering a roundabout?

Stop before every roundabout, even when it is clear.
Enter first if you reach the roundabout before other traffic.
✓ Slow down and give way when required.
Enter without giving way if you are going straight ahead.

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

Vehicle approaching a roundabout
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
How should cyclists ride when travelling in a group?

222. How should cyclists ride when travelling in a group?

✓ Predictably, with safe gaps and clear communication.
Keep the same speed even when gaps become unsafe.
Follow the cyclist ahead without checking traffic yourself.
Ride as close together as possible to stay as one group.

Safe spacing and communication help group members respond to braking, turns, obstacles, and changing traffic conditions.

Group of cyclists riding along a road
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if you see loose gravel on the road?

223. What should you do if you see loose gravel on the road?

Steer around loose patches whenever possible.
Follow the vehicle ahead closely in its tyre tracks.
Brake firmly before the tyres begin to slide.
✓ Slow down and avoid sudden steering or braking.

Loose gravel reduces grip and can make the vehicle skid. Slow down and use smooth steering and braking.

Vehicle on a loose gravel road
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why must you avoid smoking or open flames at a filling station?

224. Why must you avoid smoking or open flames at a filling station?

Heat can make the fuel nozzle stop automatically.
Smoke can interfere with the fuel gauge.
✓ Fuel vapours can ignite and cause a fire.
Smoke can prevent the fuel cap from sealing.

Petrol and other fuels can produce flammable vapours. Smoking, open flames, sparks, or other ignition sources can ignite these vapours and cause a serious fire. Follow all filling-station safety rules while refuelling.

No-smoking warning at a filling station
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
How should luggage or other cargo be carried in or on a vehicle?

225. How should luggage or other cargo be carried in or on a vehicle?

✓ Securely, within load limits, without blocking visibility or lights.
Loosely in the passenger area for short journeys.
Where it is easiest to reach while driving.
Loosely in the boot so it can move a little.

Unsecured or overloaded cargo can affect steering and braking, injure occupants during sudden stops, or fall into the road. It must not obstruct the driver's view or vehicle lights.

Luggage and cargo carried in a vehicle
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you take care when parking a motorcycle on soft ground?

226. Why should you take care when parking a motorcycle on soft ground?

The brakes may lock while the motorcycle is parked.
The engine may become difficult to start.
The chain may become too tight.
✓ The stand may sink into the ground and the motorcycle could fall.

On soft or unstable ground, the side or centre stand can sink or move, causing the motorcycle to fall. Park on a firm, stable surface or use a suitable support under the stand when necessary.

Motorcycle stand resting on soft ground
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if the windscreen becomes damaged while driving?

227. What should you do if the windscreen becomes damaged while driving?

✓ Reduce speed and stop safely if your view is affected.
Drive faster to reach a safe place sooner.
Continue driving if you can still see part of the road.
Remove loose glass while the vehicle is moving.

Severe damage can obstruct your view and weaken the glass. Do not continue if you cannot see the road clearly.

Damaged windscreen affecting the driver's view
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What shape are most warning signs in Thailand?

228. What shape are most warning signs in Thailand?

Circle.
Triangle.
Rectangle.
✓ Diamond.

Most warning signs in Thailand are diamond-shaped.

Road warning signs and their shapes
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you never reverse or make a U-turn inside a tunnel unless directed?

229. Why should you never reverse or make a U-turn inside a tunnel unless directed?

The tunnel may be too narrow for the vehicle to turn.
✓ It can cause a serious collision with approaching traffic.
Tunnel ventilation works only in the normal direction of travel.
A U-turn can confuse the tunnel's traffic monitoring system.

Other drivers may not expect a vehicle to reverse or turn around. Only change direction when instructed by police or tunnel staff.

Vehicle manoeuvring inside a road tunnel
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you not ignore temporary speed limits?

230. Why should you not ignore temporary speed limits?

They apply only to road workers.
They can be ignored when the road looks clear.
✓ They are used to protect people and manage hazards.
They are recommendations rather than limits.

Temporary speed limits may be used near roadworks, accidents, events, or dangerous conditions. They help keep traffic safe.

Temporary speed-limit sign at roadworks
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if you are unsure who has priority at a junction?

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

Rely on eye contact and enter the junction first.
Check only the direction that normally has priority.
✓ Slow down and proceed only when it is safe.
Proceed if the other driver appears to be slowing down.

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

Vehicles approaching a junction with uncertain priority
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Where should the top of the head restraint normally be positioned?

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

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

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

Adjusting the head restraint to head height
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What is the purpose of the seat-belt retractor?

233. What is the purpose of the seat-belt retractor?

To tighten the parking brake.
✓ To take up slack and lock the belt when necessary.
To release the seat belt from the buckle.
To adjust the seat height.

The seat-belt retractor takes up slack and helps keep the belt properly positioned against the body. It allows normal movement but can lock during sudden braking, rapid belt movement or a collision.

Seat-belt webbing and retracting mechanism
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should headlights, indicators, and other exterior lights be kept clean and working?

234. 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 help you see, be seen, and communicate your intentions.
They improve braking performance in poor weather.

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
How should cyclists cross railway or tram tracks?

235. How should cyclists cross railway or tram tracks?

Keep the wheels parallel with the rails while crossing.
Brake firmly while the front wheel is on the rail.
Increase speed so the wheels cannot get caught.
✓ Cross at a safe angle, as close to perpendicular as possible.

A bicycle wheel can become trapped in a rail groove. Crossing at a wider angle reduces this risk.

Cyclist crossing rails in the road
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if you miss your motorway exit?

236. What should you do if you miss your motorway exit?

Move onto the shoulder and reverse carefully.
Use an emergency opening in the central reservation.
✓ Continue to the next exit.
Turn around if traffic is light enough.

Never reverse or make a sudden manoeuvre. Continue safely and change your route at the next suitable exit.

Vehicle continuing past a motorway exit
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does this dashboard symbol indicate?

237. What does this dashboard symbol indicate?

Engine-temperature warning.
Brake-system warning.
Engine-management warning.
✓ Charging-system 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 if your windscreen becomes covered with mud or spray?

238. What should you do if your windscreen becomes covered with mud or spray?

Use the demister instead of the washers.
✓ Slow down and use the washers and wipers to restore clear vision.
Switch off the wipers until the windscreen dries.
Continue driving and wait for the spray to clear.

Clear visibility is essential. Slow down safely and use your washers and wipers until you can see the road clearly again.

Mud and spray obscuring a vehicle's windscreen
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you check before starting a manual vehicle?

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

That reverse gear is selected.
That the parking brake is released.
That first gear is selected and the accelerator is pressed.
✓ That the gearbox is in neutral and the clutch 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
How should you pass a large vehicle in strong winds?

240. How should you pass a large vehicle in strong winds?

Stay close beside it to remain sheltered from the wind.
✓ Be prepared for sudden wind changes when passing.
Use the horn before moving alongside the vehicle.
Keep the steering fixed while you move past it.

Large vehicles can block wind and then expose you to strong gusts when you pass them.

Vehicle passing a large vehicle in windy conditions
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
How can parking too close to a junction affect visibility?

241. How can parking too close to a junction affect visibility?

✓ It can block the view between road users.
It blocks the view only for pedestrians.
It has no effect if the hazard lights are on.
It improves visibility by slowing down traffic.

Parking too close to a junction can block visibility. Drivers, cyclists, and pedestrians may have difficulty seeing each other in time.

Parked vehicle obstructing visibility near a junction
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should cyclists avoid using a handheld phone?

242. Why should cyclists avoid using a handheld phone?

✓ It reduces your control and attention.
Because phones can interfere with bicycle electronics.
Because phone signals can interfere with traffic lights.
Because a phone may be used only at low speeds.

Using a phone can distract you and may prevent you from steering, braking, or reacting properly.

Cyclist using a handheld phone
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What is the minimum age for riding a moped in Thailand?

243. What is the minimum age for riding a moped in Thailand?

✓ 15 years.
14 years.
16 years.
18 years.

The minimum age for riding a moped in Thailand is generally 15 years.

Minimum age for riding a moped
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does this vehicle-control symbol indicate?

244. What does this vehicle-control symbol indicate?

Seat adjustment.
Electric window control.
Central door locking.
✓ Exterior mirror folding.

This control folds or unfolds the vehicle's exterior mirrors. It is useful when parking in narrow spaces or when leaving the vehicle parked.

Control for folding the exterior mirrors
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What do the + and − controls of cruise control normally do?

245. What do the + and − controls of cruise control normally do?

✓ Increase or decrease the selected cruising speed.
Apply or release the parking brake.
Switch between cruise control and the speed limiter.
Change the transmission gear.

When cruise control is active, the + and − controls normally increase or decrease the selected cruising speed. The amount of each adjustment can vary between vehicles.

Plus and minus controls for the cruising speed
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What is the main risk when following a vehicle with limited rear visibility?

246. What is the main risk when following a vehicle with limited rear visibility?

The driver cannot use the side mirrors.
The vehicle has priority when changing lanes.
✓ The driver may not see you clearly.
The vehicle must always travel more slowly.

Vans, trucks, and vehicles with blocked rear windows may have limited visibility. Keep extra distance and avoid sitting in blind spots.

Vehicle with limited rearward visibility
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you avoid sounding the horn near horses?

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

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

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

Vehicle approaching a horse and rider
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does the SET function of cruise control normally do?

248. What does the SET function of cruise control normally do?

Switches cruise control off.
Applies the brakes automatically.
✓ Stores the current speed as the cruising speed.
Returns to a previously stored speed.

The SET function normally stores the vehicle's current speed as the cruise-control speed. Use it only when the road, traffic, and driving conditions are suitable.

SET button for storing a cruising speed
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you expect when lanes become narrower in roadworks?

249. What should you expect when lanes become narrower in roadworks?

Temporary lane markings no longer need to be followed.
The speed limit automatically increases.
✓ Less space between your vehicle, barriers, and other traffic.
Large vehicles must stop before entering the narrow section.

Narrow lanes leave less room for error. Keep a steady position, avoid drifting toward barriers or nearby vehicles, and reduce speed if necessary.

Narrow traffic lanes through roadworks
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does this dashboard symbol indicate?

250. What does this dashboard symbol indicate?

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

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