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QuizTraffic rulesUnited States

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

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

Traffic signs
Traffic rules
United States
True/false 17 United States 14 Car controls 109 Dashboard lights 40 Right-of-way rules 9 Pedestrians 19 Bicyclists 20 Show all 581
What should you do if you are affected by glare from low sun?

151. What should you do if you are affected by glare from low sun?

Maintain your speed if you can still see the road markings.
Look only at the road immediately in front of you.
Follow the vehicle ahead closely as a guide.
✓ 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
What should you do if a vehicle is backing up near you?

152. What should you do if a vehicle is backing up near you?

Stand close behind it so the driver can see you.
Cross behind it once the driver looks forward.
Rely on the backup sensors to make it stop.
✓ Stay clear and make sure the driver can see you.

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

Pedestrian near a vehicle backing up
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Which side is normally used for passing in United States?

153. Which side is normally used for passing in United States?

✓ Left-hand side.
Right-hand side.

Drivers normally pass on the left-hand side in United States.

Vehicle passing on the left
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What is the best place to cross the road?

154. What is the best place to cross the road?

Between parked vehicles if traffic appears quiet.
Near a curve if approaching traffic seems slow.
At an intersection without checking for turning traffic.
✓ At a designated crossing.

Use a designated crossing whenever possible. It is usually the safest place to cross the road.

Designated crossing for pedestrians
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
When should you switch off your fog lights?

155. When should you switch off your fog lights?

Never, because they always improve visibility.
Whenever you stop at a traffic light.
Only after the trip is finished.
✓ When visibility improves and they are no longer needed.

Fog lights can cause glare for other road users when visibility is normal, so switch them off when conditions improve.

Fog-light control as visibility improves
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does pulling the lighting lever toward you normally do?

156. What does pulling the lighting lever toward you normally do?

✓ Flash the high-beam headlights.
Switch on the front fog lights.
Activate the turn signals.
Switch on the low-beam headlights.

Pulling the lighting lever toward you normally flashes the high-beam headlights. This briefly turns on the high beams while the lever is held or operated.

Lighting lever used to flash the high-beam headlights
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you avoid parking a gasoline or diesel vehicle on dry grass?

157. Why should you avoid parking a gasoline or diesel vehicle on dry grass?

The grass could prevent the parking brake from holding.
✓ Hot exhaust components could ignite the vegetation.
The engine could become difficult to restart.
The tires could lose pressure more quickly.

Parts of the exhaust system, especially the catalytic converter, can become very hot while driving. Parking over dry grass, leaves, or other combustible vegetation can create a fire risk. Park on a suitable non-flammable surface whenever possible.

Vehicle exhaust close to dry grass
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What is the safest choice if you have consumed alcohol?

158. What is the safest choice if you have consumed alcohol?

Eat something and wait a short while.
Drive only if you do not feel drunk.
Drink coffee before driving.
✓ Do not drive; arrange a sober driver or other safe transportation.

Alcohol can impair judgment, coordination, vision, and reaction time. A sober driver, taxi, public transit, or an overnight stay is the safer choice.

Alcohol consumption and the decision not to drive
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Which control is normally used to operate the turn signals?

159. Which control is normally used to operate the turn signals?

The cruise-control button.
The hazard-warning button.
The headlight-level control.
✓ The steering-column turn-signal lever.

The turn signals are normally operated using a lever beside the steering wheel. Moving the lever up or down activates the turn signals on the corresponding side of the vehicle.

Steering-column lever for the turn signals
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does this dashboard symbol indicate?

160. What does this dashboard symbol indicate?

✓ Diesel particulate filter warning.
Check engine light.
Engine-temperature warning.
Oil-pressure warning.

This symbol indicates a problem with the diesel particulate filter (DPF), often because soot has accumulated in the filter. The vehicle may require regeneration or professional inspection, depending on the vehicle and warning status.

Diesel particulate filter warning symbol on the dashboard
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you leave extra space behind a vehicle climbing a steep hill?

161. Why should you leave extra space behind a vehicle climbing a steep hill?

Its engine may become louder on the hill.
Its tires may warm up more quickly.
✓ It may slow down suddenly or roll backward.
It must always stop before reaching the top.

Vehicles may lose speed or briefly roll backward when starting on a steep incline. Extra space gives you more time to react.

Vehicle following another up a steep hill
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does this dashboard symbol indicate?

162. What does this dashboard symbol indicate?

The seat belt is not fastened.
✓ A door is open.
The parking brake is applied.
The airbag system has a fault.

This symbol indicates that one or more vehicle doors are not fully closed. Check that all doors are securely shut before driving.

Door-open warning symbol on the dashboard
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do when entering a roundabout?

163. What should you do when entering a roundabout?

Enter if there is space, even if other traffic must slow down.
Enter if another driver appears to be slowing down.
Yield only to traffic in the lane nearest to you.
✓ Slow down, yield when required, and enter only when safe.

When approaching a roundabout, reduce your speed, observe traffic, follow the signs and local right-of-way rules, and enter only when it is safe.

Vehicle at a roundabout entrance
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
How can you check which fuel is suitable for your vehicle?

164. How can you check which fuel is suitable for your vehicle?

Use gasoline unless the engine sounds like a diesel.
Choose the fuel that has the same color nozzle as last time.
✓ Check the fuel-filler label, fuel cap, or vehicle information.
Ask another driver with a similar-looking vehicle.

Before refueling, check which fuel type the vehicle requires. The correct fuel is often shown inside the fuel door, on or near the fuel cap, or in the vehicle information or owner's manual. Do not rely only on nozzle colors, as these can vary between gas stations and countries.

Checking the fuel label before refueling
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do when approaching an uncontrolled intersection?

165. What should you do when approaching an uncontrolled intersection?

Continue at normal speed unless another vehicle is visible.
✓ Slow down, look carefully in all directions, and proceed only when safe.
Enter first if you reach the intersection before another vehicle.
Check only the direction from which traffic usually has the right-of-way.

At an uncontrolled intersection, the right-of-way may not be obvious. Reduce speed, check carefully, and only enter when you are sure it is safe.

Vehicle approaching an uncontrolled intersection
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Does driving at the speed limit always mean your speed is safe?

166. Does driving at the speed limit always mean your speed is safe?

Yes, the speed limit is always the safest speed.
Only when driving outside built-up areas.
✓ No, you may need to drive more slowly for the conditions.
Yes, if the road ahead appears clear.

A speed limit is a maximum permitted speed, not a target. You may need to drive more slowly because of traffic, poor visibility, weather, road conditions, pedestrians, bicyclists, or other hazards.

Speed-limit sign and changing road conditions
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What is the safest way to cross the road with a child?

167. What is the safest way to cross the road with a child?

Let them walk slightly ahead of you.
Let them run once the first lane is clear.
✓ Hold their hand and keep them close.
Ask them to decide when it is safe to cross.

Children can be unpredictable near traffic. Keep them close and guide them safely across the road.

Adult holding a child's hand while crossing the road
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should pedestrians avoid sudden movements near traffic?

168. Why should pedestrians avoid sudden movements near traffic?

✓ Drivers may not have enough time to react.
You lose the right-of-way if you change direction suddenly.
Pedestrians are only allowed to walk slowly.
Drivers always expect pedestrians to walk straight.

Sudden movements can surprise drivers and reduce the time they have to slow down or stop safely.

Pedestrian movements close to road traffic
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should a motorcyclist do before entering a curve?

169. What should a motorcyclist do before entering a curve?

Move close to the center of the road.
Look only at the road directly in front of the wheel.
Accelerate before checking how sharp the curve is.
✓ Reduce speed before the curve and look through it.

Adjust your speed before entering the curve so you can steer smoothly and remain within a safe position. Look through the curve toward where you want to travel and be prepared for hazards that may be hidden from view.

Motorcyclist approaching a curve
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you avoid driving too close to the edge of the road?

170. Why should you avoid driving too close to the edge of the road?

✓ The edge may be uneven or weak.
It can make your speed harder to judge.
It can reduce the effectiveness of your mirrors.
It can make oncoming traffic harder to see.

Road edges can be soft, uneven, or damaged. Driving too close to the edge can reduce control or cause the vehicle to leave the road.

Vehicle traveling close to the road edge
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why are roads especially slippery during rain after a dry period?

171. Why are roads especially slippery during rain after a dry period?

The first rain makes the road surface softer.
Tires need time to adjust to a wet road.
✓ Oil, dust, and dirt mix with water on the road surface.
Cold rain quickly reduces the tire pressure.

After a dry period, oil and dirt can build up on the road. The first rain mixes with them and can make the surface very slippery.

Rain falling on a road after dry weather
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does this vehicle-control symbol indicate?

172. What does this vehicle-control symbol indicate?

Child safety lock.
Trunk release.
Mirror adjustment.
✓ Power door locks.

This control operates the vehicle's power door lock system. Pressing it locks or unlocks the vehicle's doors, depending on the current lock state.

Central door-locking control and symbol
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you check blind spots before starting from a stop?

173. Why should you check blind spots before starting from a stop?

To check whether the road ahead is clear.
To judge the speed of traffic approaching from behind.
To confirm other drivers have seen your turn signal.
✓ A bicyclist, pedestrian, or vehicle may be beside you.

Mirrors do not show every area around your vehicle. A blind-spot check can reveal bicyclists, pedestrians, motorcyclists, or vehicles before you start moving.

Driver checking a blind spot before moving off
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if another vehicle is tailgating you?

174. What should you do if another vehicle is tailgating you?

Tap the brakes to make them increase their distance.
Move toward the center to discourage them from passing.
✓ Stay calm and increase your safety margin ahead.
Reduce the gap ahead so they cannot move into it.

If someone follows too closely, avoid sudden actions. Keeping more space in front gives you more time to brake gently if needed. If it is safe, allow the tailgating vehicle to pass.

Following vehicle visible close behind
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should happen after an airbag has deployed?

175. What should happen after an airbag has deployed?

The airbag can be reused if it is not torn.
The airbag can be folded back into the dashboard.
✓ The restraint system should be professionally inspected and repaired.
The airbag can be removed and the vehicle used normally.

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 should you do when traffic lights change to yellow as you approach?

176. What should you do when traffic lights change to yellow as you approach?

Accelerate to pass before the light turns red.
Stop even if this requires sudden harsh braking.
Treat it like a green light until it turns red.
✓ Stop if you can do so safely.

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

Vehicle approaching a yellow traffic light
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Who should always wear a seat belt?

177. Who should always wear a seat belt?

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

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

Vehicle occupants wearing seat belts
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do with the ignition key once the engine starts?

178. What should you do with the ignition key once the engine starts?

Turn it immediately to ACC.
Remove it from the ignition.
Keep holding it in the START position.
✓ Release it so it returns from START to ON.

Once the engine starts, release the ignition key so it returns from START to the ON position. Holding the key in START unnecessarily can keep the starter motor engaged.

Releasing the ignition key after the engine starts
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you leave extra space behind a motorcycle?

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

Motorcycles need less space to stop than cars.
✓ Motorcycles can slow down quickly and are more vulnerable.
Motorcycles always travel more slowly than cars.
Motorcyclists cannot see vehicles directly behind them.

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 dashboard symbol indicate?

180. What does this dashboard symbol indicate?

Check engine light.
Engine-temperature warning.
Charging-system warning.
✓ Diesel glow-plug preheating.

This symbol indicates the diesel glow-plug preheating system. In a diesel vehicle, wait for the light to go out before starting the engine when required. If it remains illuminated or flashes while driving, it may indicate a fault.

Diesel glow-plug preheating symbol on the dashboard
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you leave space when cycling beside parked cars?

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

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

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

Bicyclist riding beside parked cars
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should bicyclists do when an emergency vehicle with lights and siren approaches?

182. What should bicyclists do when an emergency vehicle with lights and siren approaches?

✓ Stay alert and move to a safe position without obstructing it.
Move aside quickly without checking around you.
Follow closely behind it once it passes.
Stop immediately, even if you are in the traffic lane.

Emergency vehicles need a clear route. Move predictably and stop only where doing so is safe.

Bicyclist near an approaching emergency vehicle
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
You should stay focused on the road and avoid unnecessary distractions.

183. You should stay focused on the road and avoid unnecessary distractions.

✓ True.
False.

Distractions reduce awareness and reaction time, making driving more dangerous.

Driver keeping attention on the road ahead
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Should motorcyclists wear protective clothing?

184. Should motorcyclists wear protective clothing?

No, it is only useful when riding at high speeds.
Yes, but only when riding on freeways.
No, protective clothing is only needed in bad weather.
✓ Yes, it can reduce injuries from falls and contact with the road.

Motorcyclists should wear protective clothing because it can reduce injuries from falls, impacts, and sliding on the road. Suitable jackets, pants, gloves, and boots provide additional protection, but they do not replace a securely fitted helmet or safe riding.

Motorcyclist wearing protective riding clothing
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Should rear-seat passengers be securely restrained?

185. Should rear-seat passengers be securely restrained?

Yes, but only children need restraints in the rear.
Only when traveling on freeways or at higher speeds.
Only if the vehicle does not have rear airbags.
✓ Yes, using seat belts or suitable child restraints as appropriate.

Rear-seat passengers should be securely restrained using seat belts or suitable child restraints as appropriate. Proper restraint reduces the risk of serious injury and prevents occupants from being thrown around or forward in a collision.

Rear-seat passengers secured for a trip
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you be careful when driving beside a bus at a stop?

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

Bus stops usually have a lower speed limit.
A stopped bus always has the right-of-way over passing traffic.
✓ 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
What should you do when approaching a hill crest?

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

✓ Slow down and be prepared for hidden hazards.
Pass before reaching the crest.
Move toward the center of the road for a better view.
Follow the vehicle ahead closely for guidance.

A hill crest can hide vehicles, bicyclists, 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 check before starting a motorcycle trip?

188. What should you check before starting a motorcycle trip?

Only the tires if the trip is long.
Only the brakes and lights.
✓ Tires, brakes, lights, steering, and controls.
Only the fuel level and mirrors.

Before riding, carry out a basic safety check. Check the tires, 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 trip
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What can uneven tire wear indicate?

189. What can uneven tire wear indicate?

The wheels are correctly aligned.
✓ Incorrect pressure, poor alignment, or a suspension or braking problem.
The vehicle has been driven mainly at low speeds.
The tires are correctly inflated.

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

Uneven wear across a vehicle tire
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do before turning across a bike lane?

190. What should you do before turning across a bike lane?

✓ Check mirrors and blind spots carefully for bicyclists.
Enter the bike lane without checking behind.
Sound your horn and turn immediately.
Turn quickly before bicyclists reach the intersection.

Bicyclists may be beside or behind you when you turn. Check mirrors and blind spots, signal clearly, and turn only when it is safe.

Vehicle preparing to turn across a bike lane
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
How should you position your vehicle beside a fuel pump?

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

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

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

Vehicle positioned beside a fuel pump
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why can swerving suddenly to avoid a small animal be dangerous?

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

Small animals usually move away before you reach them.
✓ You may lose control or collide with another road user.
The tires can be damaged by sudden steering.
Small animals have fast reaction times.

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

Small animal in the road ahead of a vehicle
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if you see smoke or fire inside a tunnel?

193. What should you do if you see smoke or fire inside a tunnel?

Keep driving normally unless the tunnel is completely blocked.
Back up toward the entrance without checking behind.
✓ Follow tunnel instructions and leave the tunnel if it is safe to do so.
Stop near the fire so you can assess the situation.

If it is safe to drive out of the tunnel, do so. If you cannot continue safely, stop, switch off the engine, leave the vehicle, and use the marked emergency exits or refuge routes. Follow tunnel-control instructions.

Smoke inside a road tunnel
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if another road user makes a mistake?

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

Immediately pass them to get past the situation.
✓ Stay calm and avoid creating more danger.
Keep your course and expect them to correct their mistake.
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
Why should you take extra care if oil or diesel is spilled on the road?

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

It can increase tire pressure.
It can make the brakes overheat.
It can damage road markings immediately.
✓ It can make the road extremely slippery.

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
What is hydroplaning?

196. What is hydroplaning?

✓ When tires ride on a layer of water and lose contact with the road.
When steering becomes heavier on a dry road.
When low tire pressure causes a tire to burst.
When water enters the engine and causes it to stop.

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

Water separating a tire from the road surface
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why can headphones or very loud music be dangerous while driving?

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

They can make road signs harder to read.
✓ They can make important warning sounds harder to hear.
They can make the mirrors more difficult to adjust.
They can prevent the horn from working properly.

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
What should you do first after a collision?

198. What should you do first after a collision?

✓ Stop, check for danger and injuries, and call for help if needed.
Call your insurance company before checking for danger.
Continue driving if the vehicles can still move.
Check the vehicle damage before checking for injuries.

Stop the vehicle, warn other traffic where appropriate, assess immediate danger and injuries, and contact the emergency services when needed. Exchange any details required by local law.

Vehicles stopped after a road collision
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What is the purpose of the anti-glare control on the rearview mirror?

199. What is the purpose of the anti-glare control on the rearview mirror?

✓ To reduce glare from headlights behind.
To enlarge the view behind.
To activate the backup camera.
To heat the rear window.

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

Anti-glare control on an interior rearview mirror
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why can temporary road surfaces increase stopping distance?

200. Why can temporary road surfaces increase stopping distance?

Road work disables antilock braking.
Construction dust increases tire pressure.
✓ Loose gravel, mud, or uneven material may reduce tire grip.
Temporary surfaces make the brakes colder.

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

Loose or uneven road surface through road work
AI-generated by Traffic-rules.com • WCIT • CC BY-SA