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QuizTraffic rulesUnited States

This interesting quiz helps you test your knowledge in a clear and visual way. With easy multiple-choice questions, you can quickly build confidence and learn new facts while keeping it simple, interactive, and fun.

Traffic signs
Traffic rules
United States
True/false 17 United States 14 Car controls 109 Dashboard lights 40 Priority rules 9 Pedestrians 19 Cyclists 20 Show all 581
What should you do if illness affects your ability to drive safely?

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

Drive slowly and avoid busy roads.
Open a window to help you stay alert.
✓ Do not drive until you are fit to do so.
Ask a passenger to watch the road for you.

Illness can reduce concentration, alertness, coordination, or reaction time. If you do not feel fit to drive safely, postpone the journey or use another form of transport.

Driver feeling unwell before a journey
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should loose items inside a vehicle be secured?

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

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.
They can reduce tyre pressure while driving.

Loose objects can move or be thrown forwards 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 should you check before starting a bicycle journey?

203. What should you check before starting a bicycle journey?

✓ The brakes, tyres, lights, and steering.
The lights, but not the steering or brakes.
Nothing if the bicycle worked properly yesterday.
Only the tyres and chain.

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

Checking a bicycle before a journey
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you never reverse or make a U-turn inside a tunnel unless directed?

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

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

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

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

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

Move toward the centre of the road without slowing down.
Swerve around them immediately without checking traffic.
Stop beside the rocks to inspect the road.
✓ Slow down and avoid them smoothly when safe.

Loose rocks can damage tyres, 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
How should you check the engine oil level?

206. How should you check the engine oil level?

Fill the engine until oil reaches the filler opening.
Use the coolant reservoir to measure the oil level.
✓ Follow the manufacturer's instructions with the vehicle on level ground.
Check it while the engine is running at high speed.

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 do if the bonnet suddenly opens while you are driving?

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

Accelerate briefly to try to close the bonnet.
Continue driving by looking through the side window.
✓ Look through any available gap, slow down smoothly, and stop safely.
Brake hard immediately, even if traffic is behind you.

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 is the clutch biting point?

208. What is the clutch biting point?

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

The clutch biting 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 move off smoothly.

Clutch-pedal control when moving off
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you avoid following another vehicle too closely in fog?

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

To prevent your tyres from overheating.
✓ You may have too little time to react if it brakes suddenly.
To reduce fuel consumption in poor visibility.
To increase stopping distance.

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
Are bicycle helmets generally required in United States?

210. Are bicycle helmets generally required in United States?

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

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

Cyclist wearing a bicycle helmet
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What is important when raising a vehicle with its jack?

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

✓ Use the correct jacking point and never go underneath a vehicle on a jack.
Use any solid-looking part underneath the vehicle.
Raise the vehicle before applying the parking brake.
Work underneath if the jack appears stable.

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
Why should you avoid remaining beside a large vehicle on a motorway?

212. Why should you avoid remaining beside a large vehicle on a motorway?

✓ You may remain in its blind spot and have less room to escape.
Their tyres may reduce the motorway speed limit.
Driving beside them improves your view of the road ahead.
Large vehicles always travel more slowly than cars.

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

Vehicle alongside a large vehicle on a motorway
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do with the parking brake before leaving a parked vehicle?

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

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

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 do if an object falls into the driver's footwell while driving?

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

✓ Keep control and stop safely before retrieving it.
Brake suddenly so the object moves forwards.
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
Which speed unit is used in United States?

215. Which speed unit is used in United States?

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

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 avoid blocking a junction?

216. Why should you avoid blocking a junction?

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

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

Traffic blocking a road junction
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do when approaching a stop sign?

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

Give way without stopping if the road is clear.
✓ Come to a complete stop before proceeding.
Slow down and stop only if traffic is approaching.
Stop only after entering the junction.

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

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

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

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
Why should cyclists avoid riding in a large vehicle's blind spot?

219. Why should cyclists avoid riding in a large vehicle's blind spot?

Large vehicles always have priority when turning.
✓ The driver may not be able to see them.
The driver can always hear a cyclist beside the vehicle.
Blind spots matter only when a vehicle is reversing.

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

Cyclist in a large vehicle's blind spot
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does this vehicle-control symbol indicate?

220. What does this vehicle-control symbol indicate?

Headlight flash.
✓ Horn.
Cruise control.
Hazard warning lights.

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
Why should you keep a safe distance from cyclists?

221. Why should you keep a safe distance from cyclists?

Cyclists always have priority over other traffic.
Cyclists cannot signal before changing direction.
✓ They may need space to avoid obstacles.
Cyclists must move aside whenever a vehicle approaches.

Cyclists 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 cyclist
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you not overtake near the top of a hill?

222. Why should you not overtake near the top of a hill?

✓ You may not see oncoming traffic or hidden hazards.
Vehicles ahead always have priority 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, cyclists, pedestrians, or obstacles may be hidden.

Hill crest hiding the road ahead
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you slow down before a sharp bend?

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

To reduce fuel consumption.
To prevent other vehicles from overtaking.
To make the bend easier to see from a distance.
✓ To keep control of the vehicle.

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

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

Turn suddenly toward the roadside.
✓ Brake firmly while keeping control of the vehicle.
Swerve sharply into another lane.
Release the steering wheel and brake hard.

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 be cautious when following a vehicle carrying a loose load?

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

Loose loads give the vehicle priority when changing lanes.
The vehicle must stop whenever the load shifts.
✓ Objects may fall onto the road.
The vehicle must always travel at a lower speed.

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

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

Maintain speed because the animals are beside the road.
✓ Reduce speed and pass only when there is enough space.
Drive close to prevent them entering your lane.
Sound your horn so the animals move away.

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
Who is responsible for staying safe when crossing the road?

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

Only the person who creates the danger.
Only drivers when pedestrians have priority.
✓ Everyone using the road.
Only the road user without priority.

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
How can you check that a manual gearbox is in neutral?

228. How can you check that a manual gearbox is in neutral?

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

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

Checking neutral with a manual gear lever
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you be prepared for changing conditions on mountain roads?

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

Mountain roads always have the same weather.
Road conditions usually improve as altitude increases.
✓ Weather, visibility, and road conditions can change quickly.
Road signs become less important at higher elevations.

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 remove dark sunglasses before entering a tunnel?

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

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

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 do before rejoining traffic after a breakdown?

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

Check your mirrors only and pull out if they look clear.
✓ Check all around, signal, and enter only when there is a safe gap.
Pull out as soon as there is enough space for your vehicle.
Signal and expect approaching traffic to slow down.

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
What should a motorcyclist do when approaching loose gravel?

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

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

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

Motorcyclist approaching loose gravel
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
How can worn tyres affect driving in heavy rain?

233. How can worn tyres affect driving in heavy rain?

They clear water from the road more effectively.
✓ They increase the risk of aquaplaning.
They reduce the chance of skidding at low speeds.
They make steering more responsive in heavy rain.

Tyre tread helps channel water away and maintain grip. Worn tyres cannot clear water as effectively, increasing stopping distance and the risk of aquaplaning.

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

234. What is a danger of driving a petrol or diesel vehicle with the boot or tailgate open?

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

Driving with the boot 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 is the main risk when following a vehicle with limited rear visibility?

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

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

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

Vehicle with limited rearward visibility
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
How should pets be carried safely in a vehicle?

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

Loose on the front passenger seat.
Beside an open window so they can see outside.
✓ Securely restrained so they cannot distract the driver or move dangerously.
On the driver's lap if they remain calm.

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

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

Keep it pressed at the same position.
Press it fully while pressing the clutch.
✓ 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
What should you do if visibility is reduced by fog?

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

Use main beam to see further through the fog.
Follow the vehicle ahead closely as a guide.
Use hazard lights instead of normal headlights.
✓ Slow down and use the correct lights.

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
What should you avoid if your vehicle starts to skid?

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

✓ Sudden braking, acceleration, or sharp steering.
Look where you want the vehicle to go.
Allow the tyres time to regain grip.
Stay calm and maintain control.

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

Vehicle beginning to skid
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does this dashboard symbol indicate?

240. What does this dashboard symbol indicate?

Front fog lights.
Rear fog lights.
✓ Dipped headlights.
Main beam.

This symbol indicates that the dipped headlights are switched on. Dipped headlights illuminate the road ahead while limiting glare for other road users.

Dipped-headlight symbol on the dashboard
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should the seat-belt height be adjusted correctly?

241. 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 make the belt easier to unfasten.
To prevent the seat from moving.

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
Why can mixing alcohol with medicine be dangerous for drivers?

242. Why can mixing alcohol with medicine be dangerous for drivers?

Medicine prevents alcohol from causing drowsiness.
The combination is safe if taken with food.
Alcohol leaves the body faster when taking medicine.
✓ The combination may increase drowsiness or impairment.

Some prescription and non-prescription medicines 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 shape are most warning signs in United States?

243. 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 can bridges be dangerous in strong winds?

244. Why can bridges be dangerous in strong winds?

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

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 expect after one wild animal crosses the road?

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

You can continue normally once the animal has passed.
The road is likely to remain clear.
✓ More animals may follow.
Wild animals normally cross roads one at a time.

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 does this vehicle-control symbol indicate?

246. What does this vehicle-control symbol indicate?

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

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

Control for adjusting the cabin temperature
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do when a traffic light turns red?

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

Cross the stop line before stopping.
✓ Stop and wait until you may proceed.
Continue if the junction appears clear.
Follow the vehicle ahead through the junction.

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

Red traffic light at a junction
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you use a lower gear when driving downhill?

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

It allows the vehicle to coast more freely.
✓ It helps control speed using engine braking.
It reduces engine braking to save fuel.
It increases tyre grip on steep roads.

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

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

Remove the nozzle and restart the engine immediately.
✓ Stop refuelling rather than continuing to top up the tank.
Keep filling until fuel reaches the filler opening.
Shake the vehicle to make room for more fuel.

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

Fuel nozzle in a vehicle's filler opening
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if a pedestrian is crossing slowly?

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

Sound your horn to encourage them to cross faster.
✓ Wait patiently and let them finish crossing.
Pass as soon as they have cleared your part of the road.
Drive around them if there is enough room.

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