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QuizTraffic rulesThailand

Test your knowledge with our multiple-choice quiz. Learn from each answer and improve your understanding of the traffic rules and road signs of Thailand.

For informational purposes only. Always follow official regulations. Some content and images were created with AI assistance.

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 you do before a long journey to reduce the risk of driver fatigue?

151. What should you do before a long journey to reduce the risk of driver fatigue?

Keep the cabin as warm as possible.
Avoid taking any breaks until you feel tired.
Plan to drive through the night.
✓ Get enough sleep before starting the journey.

Getting enough sleep before a long journey helps reduce the risk of driver fatigue. Plan breaks in advance and avoid starting a long drive when you are already tired.

Rest and preparation before a long drive
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if your vehicle begins to drift onto the shoulder?

152. What should you do if your vehicle begins to drift onto the shoulder?

Brake firmly before returning to the road.
✓ Ease off the accelerator and steer back smoothly when safe.
Keep driving on the shoulder until the road becomes wider.
Steer back onto the road as quickly as possible.

If you drift onto the shoulder, avoid sudden steering or braking. Slow gently and return to the road smoothly when it is safe.

Vehicle drifting towards the road shoulder
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do with a child restraint after a collision?

153. What should you do with a child restraint after a collision?

Keep using it if no damage is visible.
Use it normally after tightening the straps.
✓ Follow the manufacturer's instructions about inspection or replacement.
Repair damaged parts yourself.

A child restraint may be damaged in a collision even when the damage is not obvious. Follow the manufacturer's instructions, as the restraint may need to be inspected or replaced before it is used again.

Child car seat requiring inspection after a collision
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What may happen if you release the clutch too quickly when moving off?

154. What may happen if you release the clutch too quickly when moving off?

The parking brake may engage.
The steering may lock.
✓ The engine may stall.
The headlights may switch off.

Releasing the clutch pedal too quickly when moving off can cause the engine to stall. Release the clutch smoothly through the biting point while applying the accelerator progressively.

Clutch release and engine stalling when moving off
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if the bonnet suddenly opens while you are driving?

155. What should you do if the bonnet suddenly opens while you are driving?

Brake hard immediately, even if traffic is behind you.
✓ Look through any available gap, slow down smoothly, and stop safely.
Turn sharply toward the side of the road.
Continue driving by looking through the side window.

The bonnet may completely obstruct your view. Avoid sudden movements, use the road markings or available gap to maintain direction, and stop safely.

Raised bonnet obstructing the driver's forward view
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do with the steering wheel after completing a turn?

156. What should you do with the steering wheel after completing a turn?

Hold it in the turned position.
Release it completely and let it spin freely.
Turn it quickly in the opposite direction.
✓ Guide it smoothly back towards the straight-ahead position.

After completing a turn, guide the steering wheel smoothly back towards the straight-ahead position while maintaining control. Do not allow the wheel to spin freely through your hands.

Guiding the steering wheel back after a turn
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
How should cyclists brake on a wet road?

157. How should cyclists brake on a wet road?

Use only one brake to avoid skidding.
Brake normally because wet roads do not affect grip.
Brake sharply once you are close to stopping.
✓ Brake earlier and more gradually than usual.

Wet surfaces reduce grip and increase stopping distance. Smooth, early braking helps prevent skidding.

Cyclist braking on a wet road
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you expect if the engine suddenly stalls while the vehicle is moving?

158. What should you expect if the engine suddenly stalls while the vehicle is moving?

The vehicle will stop immediately when the engine stops.
Power assistance will continue working normally.
The steering will become lighter as the vehicle slows.
✓ Steering and braking may require more effort, so move to a safe place.

Power assistance may be reduced when the engine stops. Keep control, use the hazard lights if needed, and steer toward a safe stopping area.

Driver responding to an engine stall while moving
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What can uneven tyre wear indicate?

159. What can uneven tyre wear indicate?

The tyres are correctly inflated.
The tyres have reached normal operating temperature.
✓ Incorrect pressure, poor alignment, or a suspension or braking problem.
The vehicle has been driven mainly at low speeds.

Uneven wear may result from incorrect tyre pressure, wheel misalignment, worn suspension parts, or a brake that is not releasing properly.

Uneven wear across a vehicle tyre
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What is the purpose of the anti-dazzle control on the rear-view mirror?

160. What is the purpose of the anti-dazzle control on the rear-view mirror?

To heat the rear window.
To adjust the exterior mirrors.
To activate the reversing camera.
✓ To reduce glare from headlights behind.

The anti-dazzle setting reduces glare from the headlights of vehicles behind, helping the driver maintain a clear view without being dazzled.

Anti-dazzle control on an interior rear-view mirror
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do at a railway crossing without barriers?

161. What should you do at a railway crossing without barriers?

Follow the vehicle ahead without checking yourself.
✓ Stop if required, check carefully, and cross only when safe.
Maintain your speed if the tracks look clear.
Cross quickly if you cannot see a train.

Approach railway crossings carefully, obey any requirement to stop and any warning signals or barriers, and cross only when it is safe.

Railway crossing without barriers
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What is the main purpose of a booster seat?

162. What is the main purpose of a booster seat?

✓ To position the vehicle seat belt correctly on the child.
To replace the vehicle's seat belt completely.
To make the child high enough to see through the windscreen.
To allow the child to sit without wearing a seat belt.

A booster seat raises and positions a child so the vehicle seat belt fits correctly. The lap belt should sit low across the hips and the shoulder belt should pass across the chest and shoulder, rather than the neck or abdomen.

Child seated in a booster with a vehicle seat belt
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you avoid using an ordinary extension lead to charge an electric vehicle?

163. Why should you avoid using an ordinary extension lead to charge an electric vehicle?

✓ It may overheat because it is not designed for continuous high-power charging.
It prevents the vehicle from locking while charging.
It will always charge the vehicle too quickly.
It prevents the charging port from closing afterwards.

An ordinary household extension lead may not be designed for the sustained electrical load required for EV charging and can overheat. Use suitable approved charging equipment and follow the vehicle and charging-equipment manufacturer's instructions.

Extension lead used for electric-vehicle charging
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do before refuelling a petrol or diesel vehicle?

164. What should you do before refuelling a petrol or diesel vehicle?

Leave the engine running to protect the battery.
Switch on the hazard lights while refuelling.
✓ Switch off the engine before starting to refuel.
Increase the engine speed before removing the fuel cap.

Switch off the engine before refuelling. Fuel vapours are flammable, so avoid ignition sources and follow the safety instructions at the filling station. If fuel is spilled, do not start the vehicle until the situation has been made safe.

Vehicle at a pump before refuelling
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if a tyre-pressure warning appears and handling changes?

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

✓ Reduce speed and stop safely to check the tyres.
Brake firmly to test whether the tyre still has grip.
Release air from the other tyres to balance the pressure.
Continue until the warning light goes out by itself.

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

Tyre-pressure warning and a tyre inspection
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you check before towing a trailer?

166. What should you check before towing a trailer?

Check the lights after you have started driving.
Secure the load only if it is heavy.
Check the tyres only if the trailer has been unused.
✓ The coupling, safety connections, lights, tyres, and load.

The trailer must be correctly connected and roadworthy. Its lights, tyres, safety connections, and load should all be checked.

Checking a trailer before towing
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do before overtaking another vehicle?

167. What should you do before overtaking another vehicle?

Move out first and check whether the road is clear.
✓ Make sure it is safe and allowed.
Signal and expect other traffic to make room.
Overtake whenever the vehicle ahead is moving slowly.

Before overtaking, check the road, mirrors, blind spots, signs, and markings, use your indicator, and only overtake when it is safe and permitted.

Vehicle preparing to overtake another vehicle
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if a tyre has a deep cut, bulge, or exposed cords?

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

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

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

Damaged vehicle tyre requiring inspection
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does this dashboard symbol indicate?

169. What does this dashboard symbol indicate?

✓ Seat belt not fastened.
Parking brake applied.
Airbag-system warning.
Brake-system warning.

This symbol is a seat-belt reminder. It indicates that the driver or another detected occupant has not fastened their seat belt.

Seat-belt reminder symbol on the dashboard
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you avoid driving through deep water?

170. Why should you avoid driving through deep water?

Water causes the tyres to lose air pressure.
✓ It can damage your vehicle or make you lose control.
Increase speed to maintain full control through the water.
Driving through deep water is always prohibited.

Deep water can damage the engine, reduce braking ability, hide hazards, or cause the vehicle to lose grip. Reduce speed, assess the depth and conditions carefully, and avoid entering the water if you are unsure it is safe. If necessary, stop and use another route.

Deep water covering part of a road
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Which control is normally used to operate the direction indicators?

171. Which control is normally used to operate the direction indicators?

The hazard-warning button.
The headlight-level control.
The cruise-control button.
✓ The steering-column indicator stalk.

The direction indicators are normally operated using a stalk beside the steering wheel. Moving the stalk up or down activates the indicators on the corresponding side of the vehicle.

Steering-column stalk for the direction indicators
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should the driver's floor mat be properly secured?

172. Why should the driver's floor mat be properly secured?

It could prevent the seat belt from locking.
It could reduce the effectiveness of the airbags.
✓ It could slide forwards and interfere with the pedals.
It could make the steering wheel harder to turn.

A loose or incorrectly fitted floor mat can move into the pedal area and interfere with the accelerator, brake, or clutch. Make sure the driver's floor mat is correctly fitted, secured, and does not obstruct any pedal.

Driver's floor mat near the pedals
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What is the purpose of cruise control?

173. What is the purpose of cruise control?

To steer the vehicle automatically.
To keep a fixed distance from the vehicle ahead.
To prevent the vehicle from exceeding any speed limit.
✓ To maintain a selected speed without continuous accelerator use.

Cruise control can maintain a selected speed without the driver continuously pressing the accelerator. The driver must remain attentive and ready to brake or take control when necessary.

Vehicle cruise-control buttons and symbol
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do when approaching a hill crest?

174. What should you do when approaching a hill crest?

✓ Slow down and be prepared for hidden hazards.
Maintain speed if no traffic is visible.
Follow the vehicle ahead closely for guidance.
Move toward the centre of the road for a better view.

A hill crest can hide vehicles, cyclists, pedestrians, or obstacles. Reduce speed and stay in your lane.

Vehicle approaching the crest of a hill
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do after stopping because of a breakdown?

175. What should you do after stopping because of a breakdown?

Switch off the hazard lights once the vehicle has stopped.
Leave the parking brake off if the road is level.
Stand behind the vehicle to warn approaching traffic.
✓ Apply the parking brake, switch off the engine, and use hazard lights.

Secure the vehicle so that it cannot move and use the hazard warning lights to alert approaching traffic. Where required and safe, place a warning triangle to give additional warning.

Broken-down vehicle with hazard warning lights
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does this vehicle-control symbol indicate?

176. What does this vehicle-control symbol indicate?

Seat ventilation.
✓ Seat heating.
Air conditioning.
Rear window demister.

This control activates the seat heating, which warms the seat cushion and, on many vehicles, the backrest. Several heat levels may be available.

Heated-seat control and symbol
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why can headphones or very loud music be dangerous while driving?

177. Why can headphones or very loud music be dangerous while driving?

✓ They can make important warning sounds harder to hear.
They can make the mirrors more difficult to adjust.
They can cause the speed limiter to switch off.
They can make road signs harder to read.

Headphones or very loud music can reduce your awareness of horns, sirens, warning sounds, and surrounding traffic. Keep the volume at a level that allows you to remain aware of what is happening around the vehicle.

Driver wearing headphones at the wheel
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Who is responsible for staying safe when crossing the road?

178. Who is responsible for staying safe when crossing the road?

Only pedestrians once they enter the road.
Only the road user without priority.
Only the person who creates the danger.
✓ Everyone using the road.

Road safety is a shared responsibility. Pedestrians, drivers, and cyclists all need to stay alert and follow the rules.

Pedestrians and traffic sharing a road crossing
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does turning a traditional ignition switch to OFF normally do?

179. What does turning a traditional ignition switch to OFF normally do?

Releases the parking brake.
✓ Switches off the engine and ignition systems.
Selects accessory power.
Operates the starter motor.

Turning a traditional ignition switch to OFF switches off the engine and ignition systems. The key can then normally be moved to the LOCK position and removed.

OFF position on a traditional ignition switch
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Can you assume that you are safe to drive the morning after drinking?

180. Can you assume that you are safe to drive the morning after drinking?

Yes, if you eat breakfast before driving.
Yes, if you only need to drive a short distance.
✓ No, alcohol may still remain in your body.
Yes, sleep removes all alcohol from your body.

The body needs time to process alcohol. Sleeping, eating, showering, or drinking coffee does not instantly remove it.

Fitness to drive the morning after drinking
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you slow down before a sharp bend?

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

To make the steering feel lighter.
✓ To keep control of the vehicle.
To prevent other vehicles from overtaking.
To reduce fuel consumption.

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

Vehicle approaching a sharp bend
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you check for motorcyclists before changing lanes?

182. Why should you check for motorcyclists before changing lanes?

Motorcyclists must stop when a car changes lanes.
Motorcycles always travel faster than other traffic.
✓ Motorcycles can be harder to see and may be in your blind spot.
Motorcycles need more road space than cars.

Motorcyclists are smaller and can be hidden in blind spots. Check mirrors, signal, and look carefully before changing lanes.

Motorcycle near a vehicle preparing to change lanes
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Where should you go after safely leaving a disabled vehicle in a tunnel?

183. Where should you go after safely leaving a disabled vehicle in a tunnel?

Stay close to the vehicle until traffic starts moving.
Wait directly behind the vehicle where drivers can see you.
Walk along the traffic lane toward the tunnel entrance.
✓ To a protected emergency area or exit away from traffic.

Move away from live traffic and use a marked emergency exit, refuge area, or protected walkway where available.

Leaving a disabled vehicle for a tunnel emergency area
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What may happen when you press the accelerator fully in an automatic vehicle?

184. What may happen when you press the accelerator fully in an automatic vehicle?

The engine switches off.
The transmission selects Park.
✓ The transmission may shift to a lower gear for stronger acceleration.
The parking brake applies automatically.

In many automatic vehicles, pressing the accelerator fully can activate kickdown, causing the transmission to select a lower gear and provide stronger acceleration.

Accelerator-pedal operation for automatic kickdown
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you never leave a child or pet alone in a parked vehicle on a warm day?

185. Why should you never leave a child or pet alone in a parked vehicle on a warm day?

The tyres may lose pressure while the vehicle is parked.
✓ The interior can heat up quickly and cause serious heat illness.
The vehicle battery may discharge more quickly.
The alarm system may activate unexpectedly.

The inside of a parked vehicle can heat up rapidly, even when the outside temperature does not feel extreme. Children and animals are particularly vulnerable to overheating and heatstroke. Leaving a window partly open does not make the vehicle safe.

Parked vehicle and the danger of interior heat
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you check before starting a motorcycle journey?

186. What should you check before starting a motorcycle journey?

Only the tyres if the journey is long.
✓ Tyres, brakes, lights, steering, and controls.
Nothing if the motorcycle was recently serviced.
Only the fuel level and mirrors.

Before riding, carry out a basic safety check. Check the tyres, brakes, lights, steering and controls, and inspect the drive chain, belt or other drive components where applicable. Finding a problem before setting off can prevent a breakdown or loss of control.

Checking a motorcycle before a journey
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should cyclists do when passing pedestrians on a shared path?

187. What should cyclists do when passing pedestrians on a shared path?

Pass closely if there is not enough room.
Use your bell and keep the same speed.
Assume they will hear you approaching.
✓ Slow down, give warning, and leave enough space.

Pedestrians may change direction unexpectedly. A warning and safe passing distance reduce the risk of a collision.

Cyclist passing pedestrians on a shared path
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Which side is normally used for overtaking in Thailand?

188. Which side is normally used for overtaking in Thailand?

✓ Right-hand side.
Left-hand side.

Drivers normally overtake on the right-hand side in Thailand.

Vehicle overtaking on the right
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do when following a cyclist on a narrow road?

189. What should you do when following a cyclist on a narrow road?

✓ Keep a safe distance and overtake only when there is enough space.
Drive close behind until there is room to pass.
Pass even if you cannot leave much space.
Overtake as soon as your vehicle can fit past.

Cyclists may need to avoid potholes, drains, or wind gusts. Keep distance and only pass when you can leave plenty of space.

Vehicle following a cyclist on a narrow road
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does this vehicle-control symbol indicate?

190. What does this vehicle-control symbol indicate?

Rear window demister.
Air recirculation.
Automatic headlights.
✓ Windscreen wiper speed.

This symbol relates to the windscreen wipers. The control allows the driver to select an appropriate wiping mode or speed for the amount of rain and visibility conditions.

Windscreen-wiper control for adjusting wiping speed
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does AUTO on a windscreen-wiper control normally do?

191. What does AUTO on a windscreen-wiper control normally do?

✓ Operates the wipers automatically when rain is detected.
Runs the wipers continuously at maximum speed.
Sprays washer fluid automatically.
Operates only the rear wiper.

When AUTO is selected, a rain sensor can operate the windscreen wipers automatically and adjust their operation according to the amount of moisture detected on the windscreen.

AUTO setting on the windscreen-wiper control
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why can temporary road surfaces increase stopping distance?

192. Why can temporary road surfaces increase stopping distance?

Temporary surfaces make the brakes colder.
✓ Loose gravel, mud, or uneven material may reduce tyre grip.
Temporary roads always slope downhill.
Construction dust increases tyre pressure.

Temporary surfaces may provide less grip than normal asphalt. Reduce speed and allow more distance for braking.

Loose or uneven road surface through roadworks
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you check before starting a long journey?

193. What should you check before starting a long journey?

Only the dashboard warning lights.
Only the tyres and fuel level.
✓ Tyres, lights, fluids, windows, mirrors, and essential equipment.
Only the lights if you plan to drive at night.

A brief vehicle check can reveal tyre damage, low fluid levels, faulty lights, or visibility problems before they cause danger. Also confirm that any spare wheel or tyre-repair equipment is available and usable.

Vehicle safety checks before a long journey
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you make sure drivers have seen you before crossing?

194. Why should you make sure drivers have seen you before crossing?

✓ To reduce the risk of stepping into their path.
A driver who sees you can always stop in time.
Eye contact means the driver must stop for you.
Once a driver sees you, no further checks are needed.

Before crossing, make sure approaching drivers have noticed you and that it is safe to proceed. Do not assume that a driver will stop simply because you have seen each other.

Pedestrian checking whether an approaching driver has seen them
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you leave extra following distance when towing?

195. Why should you leave extra following distance when towing?

To make the trailer easier to steer.
To reduce tyre wear on the towing vehicle.
To keep the trailer from moving side to side.
✓ Your vehicle combination may take longer to stop.

Towing adds weight and can increase stopping distance. Extra space gives you more time to react and brake smoothly.

Vehicle towing a trailer behind other traffic
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you check your mirrors regularly while driving?

196. Why should you check your mirrors regularly while driving?

To avoid having to check your blind spots.
To check whether passengers are comfortable.
✓ To stay aware of traffic around you.
To see whether road signs behind you have changed.

Regular mirror checks help you understand what is happening behind and beside your vehicle.

Driver checking traffic in a rear-view mirror
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What is aquaplaning?

197. What is aquaplaning?

✓ When tyres ride on a layer of water and lose contact with the road.
When water enters the engine and causes it to stop.
When low tyre pressure causes a tyre to burst.
When wet brakes become too hot to work properly.

Aquaplaning occurs when water builds up between the tyres and the road, causing a loss of grip and control. The risk increases at higher speeds.

Water separating a tyre from the road surface
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do before joining a motorway?

198. What should you do before joining a motorway?

Check your mirrors only and assume the blind spot is clear.
Move onto the motorway as soon as the lane markings allow.
✓ Check your mirrors and blind spot, signal, and look for a safe gap.
Signal and expect motorway traffic to make space for you.

Observe motorway traffic early, signal clearly, and merge only when there is a safe gap.

Driver checking motorway traffic before merging
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do before attempting to jump-start a vehicle?

199. What should you do before attempting to jump-start a vehicle?

Connect the leads without checking their polarity.
✓ Check the owner's manual and make sure the connections are compatible.
Use any battery that physically fits the vehicle.
Ignore battery damage if the terminals look clean.

Incorrect jump-starting can damage electrical systems, cause sparks, or make a battery explode. Connect the leads in the correct order before starting the vehicles, and follow the manufacturer's procedure exactly.

Preparing to jump-start a vehicle battery
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you leave extra space when following a large vehicle?

200. Why should you leave extra space when following a large vehicle?

To make overtaking possible without checking ahead.
To prevent the large vehicle from changing lanes.
To reduce the amount of fuel your vehicle uses.
✓ To improve your view ahead and give yourself more time to react.

A large vehicle can block your view of traffic, signs, junctions, or hazards ahead. Leaving extra space improves your view and gives you more time to react if traffic slows or a hazard develops.

Large vehicle limiting a following driver's view
AI-generated by Traffic-rules.com • WCIT • CC BY-SA