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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
Why should you remove dark sunglasses before entering a tunnel?

201. Why should you remove dark sunglasses before entering a tunnel?

To make the vehicle headlights work more effectively.
To prevent the automatic lights from switching on.
Because tunnel lighting can damage dark lenses.
✓ Your eyes need to adjust to the lower light level.

Dark sunglasses reduce the amount of light reaching your eyes and can make hazards inside a tunnel harder to see.

Driver removing sunglasses before entering a tunnel
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you check before starting a bicycle trip?

202. What should you check before starting a bicycle trip?

Only the brakes if the trip is short.
✓ The brakes, tires, lights, and steering.
Nothing if the bicycle worked properly yesterday.
Only the tires and chain.

A basic safety check can reveal problems with the brakes, tires, lights, or steering before they cause an accident.

Checking a bicycle before a trip
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does this vehicle-control symbol indicate?

203. What does this vehicle-control symbol indicate?

Hazard warning lights.
✓ Horn.
Parking assistance.
Headlight flash.

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
What should a motorcyclist do when approaching loose gravel?

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

Accelerate sharply to cross it quickly.
Lean the motorcycle more than usual.
Turn suddenly to avoid every loose stone.
✓ Reduce speed before reaching it and use smooth controls.

Loose gravel can significantly reduce tire 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 before rejoining traffic after a breakdown?

205. What should you do before rejoining traffic after a breakdown?

Check your mirrors only and pull out if they look clear.
Enter the lane slowly so other traffic has time to react.
Pull out as soon as there is enough space for your vehicle.
✓ Check all around, signal, and enter only when there is a safe gap.

Check mirrors and blind spots, signal clearly, and build up speed safely without causing approaching traffic to brake suddenly.

Vehicle preparing to rejoin traffic after a breakdown
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should the seat-belt height be adjusted correctly?

206. Why should the seat-belt height be adjusted correctly?

To increase the length of the lap belt.
✓ To position the shoulder belt correctly across the body.
To prevent the seat from moving.
To make the belt easier to unfasten.

The seat-belt height adjustment helps position the shoulder belt correctly across the chest and shoulder. It should not run across the neck or under the arm.

Height adjustment for the shoulder section of a seat belt
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Are bicycle helmets generally required in United States?

207. Are bicycle helmets generally required in United States?

Yes, for all adults.
✓ No.
Yes, for all bicyclists.

Bicycle helmets are not generally required for all bicyclists in United States, although specific age or regional rules may apply.

Bicyclist wearing a bicycle helmet
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Which speed unit is used in United States?

208. Which speed unit is used in United States?

✓ Miles per hour (mph).
Kilometers per hour (km/h).

Road speeds in United States are shown in miles per hour (mph).

Road speed expressed in miles per hour
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you never back up or make a U-turn inside a tunnel unless directed?

209. Why should you never back up 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 back up or turn around. Only change direction when instructed by police or tunnel staff.

Vehicle maneuvering inside a road tunnel
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you keep a safe distance from bicyclists?

210. Why should you keep a safe distance from bicyclists?

Bicyclists must move aside whenever a vehicle approaches.
Bicycles need more stopping distance than cars.
Bicyclists cannot signal before changing direction.
✓ They may need space to avoid obstacles.

Bicyclists may need to move around potholes, parked cars, or drains. Giving them enough space helps prevent dangerous situations.

Lateral clearance between a vehicle and a bicyclist
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should bicyclists avoid riding in a large vehicle's blind spot?

211. Why should bicyclists avoid riding in a large vehicle's blind spot?

The driver can always hear a bicyclist beside the vehicle.
Bicyclists must always stay behind large vehicles.
Blind spots matter only when a vehicle is backing up.
✓ The driver may not be able to see them.

Buses and trucks have large areas where the driver cannot see bicyclists, especially beside the vehicle and near turns.

Bicyclist in a large vehicle's blind spot
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
How can worn tires affect driving in heavy rain?

212. How can worn tires affect driving in heavy rain?

✓ They increase the risk of hydroplaning.
They make steering more responsive in heavy rain.
They clear water from the road more effectively.
They shorten the stopping distance on wet roads.

Tire tread helps channel water away and maintain grip. Worn tires cannot clear water as effectively, increasing stopping distance and the risk of hydroplaning.

Worn tire tread and wet-road grip
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What is a danger of driving a gasoline or diesel vehicle with the trunk or tailgate open?

213. What is a danger of driving a gasoline or diesel vehicle with the trunk or tailgate open?

The vehicle can become too heavy at the rear.
The rear window defroster may stop working.
The fuel gauge may become inaccurate.
✓ Exhaust fumes can be drawn into the passenger compartment.

Driving with the trunk or tailgate open can allow exhaust gases to be drawn into the vehicle. Exhaust fumes may contain carbon monoxide, which is poisonous and may be difficult to detect. Keep the luggage compartment properly closed while driving whenever possible.

Open vehicle tailgate and exhaust-fume risk
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if visibility is reduced by fog?

214. What should you do if visibility is reduced by fog?

Maintain normal speed if the road markings are visible.
Use hazard lights instead of normal headlights.
✓ Slow down and use the correct lights.
Use high beams to see farther through the fog.

Fog makes it harder to see and be seen. Reduce speed, increase following distance, and use the correct lights.

Fog reducing visibility on a road
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
How can you check that a manual transmission is in neutral?

215. How can you check that a manual transmission is in neutral?

Pull up the parking brake.
Press the accelerator pedal.
✓ Move the gearshift lever gently from side to side.
Turn the steering wheel.

When a manual transmission is in neutral, the gearshift lever can normally be moved freely from side to side across the center of the gear pattern. Check that neutral is selected before starting the engine when appropriate.

Checking neutral with a manual gearshift lever
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if animals are gathered beside a narrow rural road?

216. What should you do if animals are gathered beside a narrow rural road?

Sound your horn so the animals move away.
Drive close to prevent them entering your lane.
Use the opposite lane without checking.
✓ Reduce speed and pass only when there is enough space.

Animals beside a narrow road may step into your path. Slow down and leave as much safe space as possible.

Animals gathered beside a narrow rural road
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why can mixing alcohol with medication be dangerous for drivers?

217. Why can mixing alcohol with medication be dangerous for drivers?

Medication prevents alcohol from causing drowsiness.
✓ The combination may increase drowsiness or impairment.
Medication can cancel out the effects of alcohol.
The combination is safe if taken with food.

Some prescription and non-prescription medications can intensify alcohol-related drowsiness, dizziness, poor coordination, or reduced concentration.

Alcohol and medicine as a driving-impairment risk
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What is important when raising a vehicle with its jack?

218. What is important when raising a vehicle with its jack?

Raise the vehicle before applying the parking brake.
✓ Use the correct jacking point and never go underneath a vehicle on a jack.
Place the jack on soft ground to prevent floor damage.
Use any solid-looking part underneath the vehicle.

A jack can slip or fail if it is incorrectly positioned. Secure the vehicle and use additional approved supports before working underneath it.

Vehicle raised at a jacking point for a wheel change
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do with the parking brake before leaving a parked vehicle?

219. What should you do with the parking brake before leaving a parked vehicle?

Leave it partly applied.
✓ Apply it securely.
Release it completely.
Apply it only on a slope.

Before leaving a parked vehicle, apply the parking brake securely to help prevent unintended movement. Also select the appropriate gear or transmission position for parking.

Securing a parked vehicle with the parking brake
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you normally do when the fuel nozzle automatically clicks off?

220. What should you normally do when the fuel nozzle automatically clicks off?

✓ Stop refueling rather than continuing to top off the tank.
Remove the nozzle and restart the engine immediately.
Keep filling until fuel reaches the filler opening.
Pull the nozzle partly out and continue filling.

When the fuel nozzle automatically clicks off, stop refueling rather than repeatedly topping off the tank. Continuing can cause fuel to spill or overflow and may interfere with the vehicle's fuel-vapor control system.

Fuel nozzle in a vehicle's filler opening
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you expect after one wild animal crosses the road?

221. What should you expect after one wild animal crosses the road?

The animal will usually return the same way.
Wild animals normally cross roads one at a time.
You can continue normally once the animal has passed.
✓ More animals may follow.

Many animals travel in groups. Slow down and continue watching both sides of the road.

Wild animals crossing a road
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if an object falls into the driver's footwell while driving?

222. What should you do if an object falls into the driver's footwell while driving?

Use your foot to push it toward the passenger side.
✓ Keep control and stop safely before retrieving it.
Keep driving unless the object touches a pedal.
Reach down and remove it while continuing to drive.

Do not reach down for an object while driving, as this takes your attention away from the road and can affect vehicle control. If something falls into the driver's footwell, keep control of the vehicle and stop somewhere safe before removing it.

Dropped object close to the driver's pedals
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you avoid following another vehicle too closely in fog?

223. Why should you avoid following another vehicle too closely in fog?

To reduce fuel consumption in poor visibility.
To prevent your tires from overheating.
To keep the windshield clearer.
✓ You may have too little time to react if it brakes suddenly.

Following too closely reduces your reaction time and can lead to a collision if the vehicle ahead slows unexpectedly.

Following another vehicle in fog
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if illness affects your ability to drive safely?

224. What should you do if illness affects your ability to drive safely?

Drive only if the trip is short.
Open a window to help you stay alert.
✓ Do not drive until you are fit to do so.
Drive slowly and avoid busy roads.

Illness can impair concentration, alertness, or coordination and slow your reactions. If you do not feel fit to drive safely, postpone the trip or use another form of transportation.

Driver feeling unwell before a trip
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does this vehicle-control symbol indicate?

225. What does this vehicle-control symbol indicate?

Cabin fan speed.
✓ Cabin temperature adjustment.
Seat heating.
Air recirculation.

This control adjusts the temperature of the air supplied to the cabin. Turning it toward the blue side lowers the selected temperature, while turning it toward the red side raises it.

Control for adjusting the cabin temperature
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you avoid using air recirculation for too long in damp conditions?

226. Why should you avoid using air recirculation for too long in damp conditions?

It can overheat the engine.
It can reduce tire pressure.
✓ It can cause the windows to mist.
It can switch off the air conditioning.

Using air recirculation for too long in damp conditions can allow moisture to build up inside the vehicle and increase window misting, especially when the air conditioning is not dehumidifying the air. Switching to fresh outside air can help clear condensation.

Air-recirculation setting and misted vehicle windows
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
How should you check the engine oil level?

227. How should you check the engine oil level?

Check it while the engine is running at high speed.
Use the coolant reservoir to measure the oil level.
✓ Follow the manufacturer's instructions with the vehicle on level ground.
Add oil every time you refuel the vehicle.

Use the dipstick or electronic oil-level system as described in the owner's manual. The engine is usually switched off, and the vehicle should be standing on level ground.

Checking the engine oil level
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you normally do with the accelerator when changing to a higher gear?

228. What should you normally do with the accelerator when changing to a higher gear?

Press it fully while pressing the clutch.
Keep it pressed at the same position.
✓ Ease off it while pressing the clutch.
Press the brake pedal instead.

When changing to a higher gear, ease off the accelerator as you press the clutch and select the next gear. Release the clutch smoothly and then apply the accelerator progressively.

Changing to a higher gear in a manual vehicle
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you be cautious when following a vehicle carrying a loose load?

229. Why should you be cautious when following a vehicle carrying a loose load?

Loose loads prevent the driver from using the mirrors.
Loose loads give the vehicle the right-of-way when changing lanes.
The vehicle must stop whenever the load shifts.
✓ Objects may fall onto the road.

A poorly secured load can fall or shift suddenly. Keep extra distance and avoid following too closely.

Vehicle carrying an unsecured load ahead
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What is the clutch friction point?

230. What is the clutch friction point?

The point where the clutch pedal is fully pressed.
The point where the engine switches off.
✓ The point where the clutch begins to transmit power to the wheels.
The point where the parking brake releases.

The clutch friction point is reached as the clutch pedal is released and the clutch begins to transmit power from the engine to the transmission. Controlling this point helps the driver start moving smoothly.

Clutch-pedal control when moving off
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do when approaching a stop sign?

231. What should you do when approaching a stop sign?

✓ Come to a complete stop before proceeding.
Yield without stopping if the road is clear.
Slow down and stop only if traffic is approaching.
Proceed if the vehicle ahead has already stopped.

A stop sign requires you to come to a complete stop at the required position. Check carefully for other road users and proceed only when it is safe.

Vehicle approaching a stop sign
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if you see fallen rocks on a mountain road?

232. What should you do if you see fallen rocks on a mountain road?

✓ Slow down and avoid them smoothly when safe.
Stop beside the rocks to inspect the road.
Maintain speed and drive over smaller stones.
Swerve around them immediately without checking traffic.

Loose rocks can damage tires, affect steering, or block part of the road. Reduce speed and avoid sudden movements. If rocks are actively falling, do not enter or stop in the danger area. Keep a safe distance and, if necessary, wait in a safe place until it is safe to continue.

Fallen rocks on a mountain road
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you not pass near the top of a hill?

233. Why should you not pass near the top of a hill?

✓ You may not see oncoming traffic or hidden hazards.
Vehicles ahead always have the right-of-way on hills.
Hilltops usually have a slippery road surface.
Your engine loses power near the top of a hill.

Near the top of a hill, your view ahead is limited. Oncoming vehicles, bicyclists, pedestrians, or obstacles may be hidden.

Hill crest hiding the road ahead
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What is the main risk when following a vehicle with limited rear visibility?

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

The vehicle has the right-of-way when changing lanes.
✓ The driver may not see you clearly.
The vehicle must always travel more slowly.
The driver can see you better if you follow closely.

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
What should you do if the hood suddenly opens while you are driving?

235. What should you do if the hood suddenly opens while you are driving?

✓ Look through any available gap, slow down smoothly, and stop safely.
Brake hard immediately, even if traffic is behind you.
Turn sharply toward the side of the road.
Accelerate briefly to try to close the hood.

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

Raised hood obstructing the driver's forward view
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if a pedestrian is crossing slowly?

236. What should you do if a pedestrian is crossing slowly?

Sound your horn to encourage them to cross faster.
Move forward slowly to show that you are waiting.
Pass as soon as they have cleared your part of the road.
✓ Wait patiently and let them finish crossing.

Some pedestrians may need more time to cross. Stay patient, keep a safe distance, and do not pressure them.

Pedestrian crossing the road slowly
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why can bridges be dangerous in strong winds?

237. Why can bridges be dangerous in strong winds?

Vehicles automatically accelerate on bridges.
Steering works less effectively above water.
Bridge lighting makes it harder to judge speed.
✓ They are often exposed to stronger gusts.

Bridges are often open and exposed, allowing strong winds to affect vehicles more suddenly.

Exposed bridge in strong wind
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if a large animal suddenly enters your path?

238. What should you do if a large animal suddenly enters your path?

Accelerate to pass before the animal moves.
Turn suddenly toward the roadside.
✓ Brake firmly while keeping control of the vehicle.
Swerve sharply into another lane.

If a large animal enters the road, brake firmly while keeping the vehicle under control. Avoid sudden swerving, as this can cause you to lose control or collide with other traffic.

Large animal entering a vehicle's path
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you avoid remaining beside a large vehicle on a freeway?

239. Why should you avoid remaining beside a large vehicle on a freeway?

✓ You may remain in its blind spot and have less room to escape.
Large vehicles always travel more slowly than cars.
Driving beside them improves your view of the road ahead.
Large vehicles cannot change lanes at freeway speeds.

Large vehicles have significant blind spots. Avoid traveling alongside them longer than necessary.

Vehicle alongside a large vehicle on a freeway
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What shape are most warning signs in United States?

240. What shape are most warning signs in United States?

✓ Diamond.
Circle.
Triangle.
Rectangle.

Most warning signs in United States are diamond-shaped.

Road warning signs and their shapes
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you use a lower gear when driving downhill?

241. Why should you use a lower gear when driving downhill?

It increases tire grip on steep roads.
✓ It helps control speed using engine braking.
It makes the steering lighter on descents.
It allows the vehicle to coast more freely.

Engine braking helps prevent the vehicle from gaining too much speed and reduces strain on the brakes.

Lower-gear selection for a downhill road
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Who is responsible for staying safe when crossing the road?

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

Only the road user without the right-of-way.
Only the person who creates the danger.
Only pedestrians once they enter the road.
✓ Everyone using the road.

Road safety is a shared responsibility. Pedestrians, drivers, and bicyclists 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 should you do when a traffic light turns red?

243. What should you do when a traffic light turns red?

Stop only if other traffic is approaching.
Cross the stop line before stopping.
✓ Stop and wait until you may proceed.
Continue if the intersection appears clear.

A red traffic light means you must stop before the stop line, crosswalk, or intersection unless a sign or signal indicates otherwise.

Red traffic light at an intersection
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you be prepared for changing conditions on mountain roads?

244. Why should you be prepared for changing conditions on mountain roads?

Mountain roads always have the same weather.
✓ Weather, visibility, and road conditions can change quickly.
Road conditions usually improve as altitude increases.
Vehicles automatically lose engine power in the mountains.

Fog, rain, snow, ice, falling rocks, and strong winds can develop rapidly in mountainous areas.

Changing visibility and weather on a mountain road
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you slow down before a sharp curve?

245. Why should you slow down before a sharp curve?

To reduce fuel consumption.
To make the steering feel lighter.
✓ To keep control of the vehicle.
To make the curve easier to see from a distance.

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

Vehicle approaching a sharp curve
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you avoid blocking an intersection?

246. Why should you avoid blocking an intersection?

✓ Other traffic needs space to move safely.
Your stopping distance becomes longer.
Intersections may only be entered at low speed.
Traffic lights may stop working.

Blocking an intersection can prevent vehicles, bicyclists, or pedestrians from moving safely. Enter only when there is enough space to drive through and clear the intersection.

Traffic blocking a road intersection
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should loose items inside a vehicle be secured?

247. Why should loose items inside a vehicle be secured?

They can interfere with the vehicle's exterior lights.
They can increase the vehicle's fuel consumption.
✓ They can become dangerous projectiles during sudden braking or a collision.
They can make the engine overheat.

Loose objects can move or be thrown forward during sudden braking or a collision. Secure luggage and other items so they cannot injure occupants or interfere with the driver or vehicle controls.

Loose luggage and objects inside a vehicle
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does this dashboard symbol indicate?

248. What does this dashboard symbol indicate?

✓ Low-beam headlights.
High-beam headlights.
Parking lights.
Front fog lights.

This symbol indicates that the low-beam headlights are switched on. Low-beam headlights illuminate the road ahead while limiting glare for other road users.

Low-beam headlight symbol on the dashboard
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
How should pets be carried safely in a vehicle?

249. How should pets be carried safely in a vehicle?

Beside an open window so they can see outside.
On the driver's lap if they remain calm.
Free to move around during short trips.
✓ Securely restrained so they cannot distract the driver or move dangerously.

A pet moving freely inside a vehicle can distract the driver and may be thrown around during sudden braking or a collision. Use a suitable carrier, harness, barrier, or other secure restraint appropriate for the animal and vehicle.

Pet traveling inside a vehicle
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you avoid if your vehicle starts to skid?

250. What should you avoid if your vehicle starts to skid?

Look where you want the vehicle to go.
✓ Sudden braking, acceleration, or sharp steering.
Allow the tires time to regain grip.
Use smooth steering movements.

Sudden braking, acceleration, or steering can make a skid worse. Stay calm and use smooth controls while the tires regain grip.

Vehicle beginning to skid
AI-generated by Traffic-rules.com • WCIT • CC BY-SA