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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 a child runs onto the road ahead?

301. What should you do if a child runs onto the road ahead?

Accelerate to pass before the child moves further into the road.
✓ Brake firmly and be prepared to stop.
Sound your horn and continue driving.
Swerve immediately into the opposite lane.

Children can act unpredictably. Brake firmly, stay alert, and be prepared for more children to follow.

Child entering the road ahead of a vehicle
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does this dashboard symbol indicate?

302. What does this dashboard symbol indicate?

✓ Low engine oil level.
Charging-system warning.
Low oil pressure.
Engine-temperature warning.

This symbol indicates that the engine oil level is low. Check the oil level according to the manufacturer's instructions and add the correct oil if necessary.

Low oil-level warning symbol on the dashboard
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do before passing while towing a trailer?

303. What should you do before passing while towing a trailer?

Follow closely before moving out to pass.
Accelerate sharply once you move into the other lane.
✓ Allow extra time and distance for the maneuver.
Begin passing as soon as the road looks clear.

A towing vehicle accelerates more slowly, and the trailer makes the whole vehicle combination longer. Remember to allow a much larger safe gap before passing and enough space to return safely to your lane.

Vehicle preparing to pass while towing a trailer
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do with the clutch during emergency braking in a manual vehicle?

304. What should you do with the clutch during emergency braking in a manual vehicle?

Pump it repeatedly.
Keep it partly pressed.
✓ Press it fully while maintaining firm brake pressure.
Release it suddenly.

During emergency braking in a manual vehicle, maintain firm pressure on the brake and press the clutch pedal fully so the engine does not stall as the vehicle slows. Do not reduce braking pressure while operating the clutch.

Brake and clutch operation during an emergency stop
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you normally do before shifting gears in a vehicle with a manual transmission?

305. What should you normally do before shifting gears in a vehicle with a manual transmission?

Switch off the engine.
Press the accelerator pedal fully.
Apply the parking brake.
✓ Press the clutch pedal fully.

Pressing the clutch pedal disconnects the engine from the transmission so that another gear can be selected. After shifting gears, the clutch pedal should be released smoothly.

Clutch operation when changing gear in a manual vehicle
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What is the main safety risk of aggressive driving?

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

It can increase tire and brake wear.
It can make the trip less comfortable.
✓ It increases the risk of crashes.
It can increase fuel consumption.

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 behavior in traffic
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
How should you pass a large vehicle in strong winds?

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

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

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
When should you use rear fog lights?

308. When should you use rear fog lights?

✓ When visibility is seriously reduced by fog or similar conditions.
When driving on an unlit road.
When visibility is slightly reduced.
When another vehicle is following closely.

Rear fog lights are very bright and should only be used when visibility is poor enough to require them.

Rear fog lights used in severely reduced visibility
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you leave space beside large vehicles when they turn?

309. Why should you leave space beside large vehicles when they turn?

✓ They may need extra room to complete the turn.
They always turn more slowly than cars.
They must stop before making every turn.
They always have the right-of-way while turning.

Large vehicles often swing wide when turning and have larger blind spots. Keep clear and do not move into the space beside them.

Large vehicle needing extra space to turn
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do when walking near a driveway?

310. What should you do when walking near a driveway?

Watch only for vehicles leaving the driveway.
✓ Watch for vehicles entering or leaving.
Rely on engine noise to warn you of vehicles.
Assume vehicles will stop before crossing your path.

Vehicles may enter or leave driveways suddenly. Stay alert and check for moving vehicles.

Pedestrian passing a driveway entrance
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What may happen if you release the clutch too quickly when starting from a stop?

311. What may happen if you release the clutch too quickly when starting from a stop?

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

Releasing the clutch pedal too quickly when starting from a stop can cause the engine to stall. Release the clutch smoothly through the friction 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 does the AUTO setting on the lighting control do?

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

It switches on the front fog lights.
It flashes the headlights automatically.
It switches on the hazard warning lights.
✓ It switches the headlights on or off automatically when needed.

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
How can air conditioning help defog the windows?

313. How can air conditioning help defog the windows?

By increasing air recirculation.
✓ By removing moisture from the air.
By opening the windows automatically.
By heating the rear window directly.

Using the air conditioning can help defog the windows because it removes moisture from the cabin air. Directing this drier air toward the windshield can clear condensation more quickly.

Air-conditioning controls used to defog the windshield
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you look well ahead while driving?

314. Why should you look well ahead while driving?

To follow the vehicle ahead more closely.
To concentrate only on traffic in your lane.
To maintain the same speed in every situation.
✓ To identify developing hazards early and gain more time to react.

Looking well ahead helps you identify developing hazards early, such as slowing traffic, pedestrians, intersections, or changing road conditions. Earlier detection gives you more time to assess the situation and respond smoothly and safely.

Driver observing the road and traffic ahead
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do when your view is blocked at an intersection?

315. What should you do when your view is blocked at an intersection?

✓ Slow down and proceed carefully.
Look only in the direction traffic normally comes from.
Drive through quickly before other traffic appears.
Follow the vehicle ahead without checking yourself.

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

Restricted view of approaching traffic at an intersection
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does the resume function of cruise control normally do?

316. What does the resume function of cruise control normally do?

✓ Returns the vehicle to the previously set cruising speed.
Sets the vehicle's current speed as a new limit.
Applies the brakes automatically.
Switches cruise control off completely.

The resume function normally returns the vehicle to the previously set cruise-control speed after the system has been temporarily disengaged. The driver should use it only when traffic and road conditions are suitable.

RES button for resuming the stored cruising speed
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you leave extra space behind a vehicle carrying animals?

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

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

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

Vehicle following an animal transporter
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does this dashboard symbol indicate?

318. What does this dashboard symbol indicate?

Power-steering warning.
Check engine light.
✓ Service or maintenance required.
Charging-system warning.

This symbol indicates that the vehicle requires servicing or maintenance. The exact meaning and required maintenance can vary between vehicles, so check the vehicle information display or owner's manual.

Service reminder symbol on the dashboard
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you normally do with a manual transmission during a long stop?

319. What should you normally do with a manual transmission during a long stop?

Select reverse gear.
Keep first gear selected with the clutch pressed.
✓ Select neutral and release the clutch.
Keep the accelerator pressed.

During a longer stop, selecting neutral and releasing the clutch can reduce unnecessary strain on the clutch release mechanism. Keep the vehicle securely held with the brake or parking brake as appropriate.

Neutral gear selection during a longer stop
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do when an automatic vehicle is stationary in D?

320. What should you do when an automatic vehicle is stationary in D?

Release the parking brake.
Press the accelerator lightly.
Select reverse gear.
✓ Keep the brake pedal pressed.

An automatic vehicle may creep forward when D (Drive) is selected, even without pressing the accelerator. Keep the brake pedal pressed while stationary to prevent unintended movement.

Automatic gear selector in Drive and brake-pedal control
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What color is a stop sign usually?

321. What color is a stop sign usually?

✓ Red.
Green.
Blue.
White.

Stop signs are almost always red because red is universally associated with danger and the need to stop immediately.

Red octagonal stop sign
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
How should a disabled vehicle be towed?

322. How should a disabled vehicle be towed?

By attaching a rope to the bumper.
✓ Use approved towing points and a method permitted by local rules.
At the highest possible safe speed.
With nobody controlling the disabled vehicle.

Incorrect towing can damage the vehicle or cause loss of control. Follow the manufacturer's instructions and local rules, and use a professional towing service when the correct procedure is uncertain.

Disabled vehicle being towed
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Does opening a window make an alcohol-impaired driver safe?

323. Does opening a window make an alcohol-impaired driver safe?

Yes, if you also drink some water.
Yes, because fresh air helps you sober up.
✓ No, fresh air does not remove alcohol from the body.
Yes, if you feel more awake afterward.

Fresh air may make someone feel more awake, but it does not reduce their alcohol concentration or restore safe driving ability.

Open car window and an alcohol-impaired driver
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you use your turn signal before turning?

324. Why should you use your turn signal before turning?

To make other road users stop for you.
To show that the turn is safe to make.
To replace checking mirrors and blind spots.
✓ To show other road users what you plan to do.

Turn signals help other drivers, bicyclists, and pedestrians understand your intentions in time.

Vehicle turn signal indicating an intended turn
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does the intermittent wiper interval control adjust?

325. What does the intermittent wiper interval control adjust?

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

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

Interval adjustment for intermittent windshield wiping
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if EV charging equipment becomes unusually hot or smells burnt?

326. What should you do if EV charging equipment becomes unusually hot or smells burnt?

Pour water over the equipment to cool it.
Continue charging at a lower power setting.
✓ Stop the charging session, keep clear, and report the fault.
Cover the equipment to contain the heat.

Unusual heat, a burning smell, smoke, sparks, or repeated charging faults can indicate an electrical problem. Stop using the charging equipment if it is safe to do so, keep clear of anything damaged or overheating, and report the fault or seek appropriate assistance.

Faulty electric-vehicle charging equipment
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if you feel tired while driving?

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

Turn up the radio to stay alert.
Drink coffee and continue without stopping.
✓ Stop in a safe place and take a break.
Open a window and continue driving.

Driving while tired reduces concentration and reaction time. Stop somewhere safe and rest before continuing.

Tired driver taking a break from a trip
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
How should you leave a broken-down vehicle when traffic is passing nearby?

328. How should you leave a broken-down vehicle when traffic is passing nearby?

Get out immediately without checking for traffic.
✓ Use the door furthest from moving traffic when it is safe to do so.
Walk around the vehicle on the traffic side.
Leave through the door nearest moving traffic.

Leaving through the side away from traffic reduces the risk of being struck by a passing vehicle.

Leaving a broken-down vehicle away from passing traffic
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if fog becomes so thick that you cannot see safely?

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

Follow the vehicle ahead closely for guidance.
Use high beams and keep driving.
Stop immediately in the traffic lane.
✓ 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
What should you do when people are waiting at a crosswalk?

330. What should you do when people are waiting at a crosswalk?

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

When people are waiting near a crosswalk, reduce your speed and be ready to stop. Pedestrians may begin crossing at any moment.

People waiting at a crosswalk
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do when road work is ahead?

331. What should you do when road work is ahead?

Follow the vehicle ahead closely through the work zone.
Ignore temporary signs if permanent signs are still visible.
Use your horn to warn road workers that you are approaching.
✓ Slow down and follow the temporary signs.

Road work can create narrow lanes, workers near traffic, uneven surfaces, and temporary rules. Slow down and follow the signs.

Road work and temporary traffic signs ahead
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
How should you approach a sharp curve on a mountain road?

332. How should you approach a sharp curve on a mountain road?

Move toward the center of the road for a better view.
Pass just before entering the curve.
✓ Reduce speed before the curve and remain in your lane.
Accelerate through the curve to maintain momentum.

Mountain curves may hide oncoming vehicles, bicyclists, animals, or debris. Slow down before entering and keep a safe road position.

Sharp curve on a mountain road
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if the brake pedal feels unusually soft?

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

✓ Stop safely and have the braking system inspected.
Press the accelerator harder before braking.
Reduce the tire pressure to improve braking.
Continue until the brakes begin making noise.

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 should you do after stopping because of a breakdown?

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

Leave the parking brake off if the road is level.
Stand behind the vehicle to warn approaching traffic.
Switch off the hazard lights once the vehicle has stopped.
✓ 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
How can alcohol affect your driving ability?

335. How can alcohol affect your driving ability?

✓ It can impair judgment and coordination and slow your reactions.
It improves your ability to judge distance.
It makes your reactions faster.
It improves your vision in poor light.

Alcohol affects several abilities needed for safe driving, including concentration, decision-making, coordination, and hazard perception.

Alcohol impairment and driving ability
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What may happen to the steering when the ignition key is removed?

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

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

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
Why must a roof load be securely attached?

337. Why must a roof load be securely attached?

Because light roof loads cannot be affected by the wind.
To keep the vehicle within its normal height.
Because the roof will hold the load in place while driving.
✓ It could shift or fall and create a serious hazard.

A roof load is exposed to strong airflow and movement. It must be restrained correctly and kept within the permitted limits.

Load secured to a vehicle's roof
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Which control is normally used to switch on the low-beam headlights?

338. Which control is normally used to switch on the low-beam headlights?

The hazard warning switch.
The windshield-wiper control.
The rear-window defroster.
✓ The lighting control.

The lighting control is normally used to switch on the low-beam headlights. Depending on the vehicle, it may be a rotary switch or part of a lighting lever.

Lighting control for switching on low-beam headlights
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does this dashboard symbol indicate?

339. What does this dashboard symbol indicate?

Oil-pressure warning.
Check engine light.
✓ Engine-temperature warning.
Low washer fluid.

This symbol indicates that the engine coolant temperature is too high. If it illuminates while driving, stop safely and allow the engine to cool before investigating the cause.

Engine-temperature warning symbol on the dashboard
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you normally do before selecting D or R in an automatic vehicle?

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

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

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 you hold the steering wheel firmly during strong gusts?

341. Why should you hold the steering wheel firmly during strong gusts?

To reduce braking distance.
To make the power steering work better.
To keep the suspension level.
✓ To maintain control if the vehicle is pushed.

A firm but relaxed grip helps you respond safely to sudden changes caused by wind.

Driver holding the steering wheel during strong gusts
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why are backing up and making a U-turn on a freeway extremely dangerous?

342. Why are backing up and making a U-turn on a freeway extremely dangerous?

✓ Other drivers approach quickly and do not expect traffic facing them.
The vehicle may use more fuel during the maneuver.
Freeway cameras may not recognize the vehicle correctly.
The speedometer may become less accurate.

Freeway traffic travels at high speed. Unexpected backing up or turning can cause a severe collision.

Vehicle on a freeway shoulder
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why can bridges and overpasses become icy before nearby roads?

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

Road salt is less effective on bridges.
Bridges are always at a higher altitude.
Their barriers trap cold air on the road surface.
✓ Cold air circulates above and below them.

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
Why should you leave extra space when passing road workers?

344. Why should you leave extra space when passing road workers?

Road workers are protected by the construction barriers.
✓ They may be working close to moving traffic.
To avoid damaging temporary road markings.
Road workers always have the right-of-way over passing traffic.

Workers may be only a short distance from passing vehicles. Reduce speed and leave as much safe space as possible.

Vehicle passing workers close to the road
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What is the button on a seat-belt buckle used for?

345. What is the button on a seat-belt buckle used for?

To lock the seat in position.
To tighten the shoulder belt.
To adjust the belt height.
✓ To release the seat belt.

Pressing the button on the seat-belt buckle releases the latch so the belt can be unfastened. Keep the seat belt fastened whenever required while the vehicle is moving.

Release button on a seat-belt buckle
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do about a flat tire on a high-speed road?

346. What should you do about a flat tire on a high-speed road?

Repair the tire beside the traffic lane using hazard lights.
✓ Move to a protected location if possible and call roadside assistance.
Stop immediately and change the tire where you are.
Ask passengers to help change the wheel quickly.

Changing a wheel close to high-speed traffic is extremely dangerous. Move away from traffic and use professional assistance.

Vehicle stopped with a flat tire on a high-speed road
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should bicyclists do when passing pedestrians on a shared path?

347. What should bicyclists do when passing pedestrians on a shared path?

✓ Slow down, give warning, and leave enough space.
Pass closely if there is not enough room.
Use your bell and keep the same speed.
Pass quickly before they change direction.

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

Bicyclist passing pedestrians on a shared path
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do when traffic is merging from another lane?

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

Move into another lane without checking around you.
Maintain your speed and expect them to merge behind you.
✓ Adjust your speed and leave space when safe.
Move closer to the vehicle ahead to keep your lane clear.

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

Vehicle merging from an adjacent lane
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if an unusual vibration develops in the steering wheel?

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

✓ Reduce speed and have the tires, wheels, and steering checked.
Increase speed until the vibration becomes less noticeable.
Keep driving if the vehicle still steers normally.
Reduce the tire pressure slightly to smooth the ride.

An unusual vibration may indicate tire 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
What should you do before crossing behind a bus or large vehicle?

350. What should you do before crossing behind a bus or large vehicle?

Listen for traffic and cross if you hear none.
Stay close behind the vehicle while crossing.
Cross if the nearest traffic lane appears clear.
✓ Wait until you have a clear view of the road.

Large vehicles can block your view and hide you from drivers. Wait until you can clearly see the road before crossing.

Pedestrian preparing to cross behind a bus
AI-generated by Traffic-rules.com • WCIT • CC BY-SA