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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 when approaching a curve with poor visibility?

551. What should you do when approaching a curve with poor visibility?

Maintain your speed if the road ahead appears clear.
Follow the vehicle ahead closely through the curve.
✓ Slow down and stay in your lane.
Move slightly toward the centre for a better view.

A curve can hide oncoming traffic, obstacles, cyclists, or pedestrians. Reduce speed and keep a safe position.

Bend with limited visibility and a MUTCD-style warning sign
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Can coffee, energy drinks, fresh air, or loud music replace proper rest when you are tired?

552. Can coffee, energy drinks, fresh air, or loud music replace proper rest when you are tired?

✓ No, they may only increase alertness temporarily.
Yes, if the journey is less than one hour.
Only coffee can replace proper rest.
Yes, if you use several of them together.

Coffee, energy drinks, fresh air, or loud music may make you feel more alert for a short time, but they do not remove fatigue. If you are too tired to drive safely, stop somewhere safe and get proper rest.

Stimulant drinks and driver tiredness
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Using indicators helps other road users understand your intentions.

553. Using indicators helps other road users understand your intentions.

✓ True.
False.

Indicators help communicate your intended direction and improve safety for everyone on the road.

Vehicle signalling its intended direction
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you avoid unnecessary lane changes in roadworks?

554. Why should you avoid unnecessary lane changes in roadworks?

✓ Narrow lanes and changing layouts increase the risk of collision.
Drivers should always use the lane with fewer vehicles.
Changing lanes helps traffic move faster through roadworks.
Lane changes are safer when traffic is moving slowly.

Frequent lane changes create additional risk where space is limited and drivers are already adapting to temporary layouts.

Vehicles travelling through restricted roadworks lanes
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why must you avoid smoking or open flames at a filling station?

555. Why must you avoid smoking or open flames at a filling station?

✓ Fuel vapours can ignite and cause a fire.
Open flames can reduce the fuel's quality.
Smoke can prevent the fuel cap from sealing.
Smoke can interfere with the fuel gauge.

Petrol and other fuels can produce flammable vapours. Smoking, open flames, sparks, or other ignition sources can ignite these vapours and cause a serious fire. Follow all filling-station safety rules while refuelling.

No-smoking warning at a filling station
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if your vehicle catches fire?

556. What should you do if your vehicle catches fire?

Try to move personal belongings out before leaving.
Keep driving slowly until you find a safer place to stop.
✓ Stop, switch off the engine, evacuate everyone, and call the emergency services.
Stay inside the vehicle while waiting for assistance.

Move everyone well away from the vehicle and call emergency services. If the fire is small and it is safe to do so, use a suitable fire extinguisher. Opening the bonnet fully can supply additional oxygen and cause the fire to intensify.

Vehicle with a fire breaking out
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Who normally has priority at roundabouts in United States?

557. Who normally has priority at roundabouts in United States?

✓ Traffic already on the roundabout.
Traffic entering the roundabout.

In United States, traffic entering a roundabout normally gives way to traffic already circulating.

Vehicles approaching and circulating on a roundabout
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if traffic suddenly slows on a motorway?

558. What should you do if traffic suddenly slows on a motorway?

✓ Slow down smoothly and warn traffic behind if needed.
Brake suddenly as soon as you notice slower traffic.
Change lanes immediately to avoid slowing down.
Move onto the shoulder and continue driving.

When traffic slows suddenly, reduce speed smoothly, keep a safe distance, and use hazard lights if needed to warn following traffic.

Motorway traffic slowing ahead
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What is the purpose of the seat-belt retractor?

559. What is the purpose of the seat-belt retractor?

✓ To take up slack and lock the belt when necessary.
To tighten the parking brake.
To release the seat belt from the buckle.
To adjust the seat height.

The seat-belt retractor takes up slack and helps keep the belt properly positioned against the body. It allows normal movement but can lock during sudden braking, rapid belt movement or a collision.

Seat-belt webbing and retracting mechanism
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
How does higher speed affect a vehicle's stopping distance?

560. How does higher speed affect a vehicle's stopping distance?

It affects reaction distance but not braking distance.
It affects braking distance only on wet roads.
✓ It increases the distance needed to stop.
It decreases the distance needed to stop.

As speed increases, the vehicle travels farther while the driver reacts and requires more distance to brake. This means the total stopping distance increases significantly as speed rises.

Vehicle speed and the distance needed to stop
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if steam begins coming from underneath the bonnet?

561. What should you do if steam begins coming from underneath the bonnet?

Continue driving slowly until the steam stops.
✓ Stop safely, switch off the engine, and keep clear until it has cooled.
Keep the engine running so the cooling system keeps working.
Open the coolant cap to release the pressure.

Steam can indicate an overheated and pressurised cooling system. Do not remove the coolant cap while the system is hot.

Steam rising from underneath a vehicle's bonnet
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does this dashboard symbol indicate?

562. What does this dashboard symbol indicate?

Differential lock.
✓ Four-wheel-drive system.
Low tyre pressure.
Electronic stability control.

This symbol relates to the vehicle's four-wheel-drive system, which can transmit power to all four wheels. The exact symbol and operating modes vary between vehicles.

Four-wheel-drive system symbol on the dashboard
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What information is needed when requesting emergency assistance?

563. What information is needed when requesting emergency assistance?

Your name, destination, and planned route.
Only the road name and nearest town.
✓ Your exact location, direction of travel, vehicle details, and the problem.
Your insurance details and last service date.

Road numbers, junctions, location markers, direction of travel, and a clear description of the incident help assistance reach you quickly.

Requesting help after a vehicle breakdown
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does this vehicle-control symbol indicate?

564. What does this vehicle-control symbol indicate?

Seat adjustment.
✓ Steering-wheel adjustment.
Exterior mirror adjustment.
Cruise control.

This control adjusts the position of the steering wheel. Depending on the vehicle, the steering wheel may be moved up or down and forwards or backwards to obtain a safe and comfortable driving position.

Control for adjusting the steering-wheel position
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do when driving through heavy rain?

565. What should you do when driving through heavy rain?

Use cruise control to maintain a constant speed.
Accelerate through the rain to clear it more quickly.
✓ Reduce speed and increase your following distance.
Drive closer to the vehicle ahead for guidance.

Heavy rain reduces grip and visibility. Lower speed and extra distance give you more time to react safely.

Vehicle travelling through heavy rain
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why does higher speed increase the risk of aquaplaning?

566. Why does higher speed increase the risk of aquaplaning?

The suspension becomes less effective at high speed.
The brakes cannot remove water from the tyres.
The vehicle becomes heavier as speed increases.
✓ The tyres have less time to clear water from the road surface.

At higher speeds, the tyres may not disperse water effectively, making it easier for the vehicle to lose contact with the road.

Vehicle speed and aquaplaning on a wet road
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if you realise you have put the wrong fuel in your vehicle?

567. What should you do if you realise you have put the wrong fuel in your vehicle?

Add the correct fuel and continue driving.
Rev the engine briefly to mix the fuels.
✓ Do not start the engine, and seek assistance.
Start the engine and drive slowly to use the fuel.

If you have used the wrong fuel, do not start the engine. Starting it can circulate the incorrect fuel and cause further damage. If possible, avoid switching on the ignition and seek appropriate roadside or workshop assistance.

Fuel nozzle and the risk of misfuelling
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What does this dashboard symbol indicate?

568. What does this dashboard symbol indicate?

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

This symbol indicates that the rear fog lights are switched on. Rear fog lights make the vehicle more visible from behind in conditions of severely reduced visibility, but they can dazzle other road users when used unnecessarily.

Rear fog-light symbol on the dashboard
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do before driving with a load?

569. What should you do before driving with a load?

Leave light items loose for short journeys.
Place heavy items on top of lighter items.
Check the load only after you have started driving.
✓ Make sure it is properly secured and cannot move or fall.

An unsecured load can shift, affect vehicle control, or fall into the road. Check that everything is safely restrained before moving.

Checking a vehicle's load before setting off
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do when joining a motorway from an entry lane?

570. What should you do when joining a motorway from an entry lane?

Stop at the end of the entry lane and wait for a large gap.
✓ Match your speed, check around you, and merge into a safe gap.
Merge as soon as the entry lane begins.
Enter at a low speed and let motorway traffic adjust.

Use the entry lane to build a suitable speed, check carefully, signal, and merge only when it is safe.

Vehicle joining a motorway from an entry lane
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do if birds are swooping at you while cycling?

571. What should you do if birds are swooping at you while cycling?

✓ Slow down, stay calm, and leave the area without provoking them.
Stop near the nest to see why they are swooping.
Throw objects towards the birds.
Accelerate as fast as possible to escape.

Some birds become territorial during the breeding season and may swoop people near their nests. Stay calm, avoid provoking or approaching the birds, and leave the area safely. If necessary and safe, dismount and walk your bicycle through or away from the area while keeping your helmet on.

Bird swooping near a cyclist
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
You should signal before turning or changing lanes.

572. You should signal before turning or changing lanes.

False.
✓ True.

A clear signal helps other road users understand your intentions, but you must still check that the manoeuvre can be made safely.

Vehicle signalling before a turn
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do with the parking brake when parking on a slope?

573. What should you do with the parking brake when parking on a slope?

Release it completely.
✓ Apply it firmly.
Use it only if the engine is running.
Leave it partly applied.

When parking on a slope, apply the parking brake firmly to help prevent the vehicle from rolling. Selecting an appropriate gear or Park provides additional security.

Using the parking brake when parking on a slope
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you consider before selecting a lower gear in a manual vehicle?

574. What should you consider before selecting a lower gear in a manual vehicle?

Whether the parking brake is applied.
✓ Whether the vehicle's speed is suitable for the lower gear.
Whether the steering wheel is centred.
Whether the headlights are switched on.

Before selecting a lower gear, make sure the vehicle's speed is suitable for that gear. Selecting too low a gear at excessive speed can cause harsh engine braking and place unnecessary stress on the drivetrain.

Selecting a lower gear in a manual vehicle
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should you switch on dipped headlights before entering a tunnel?

575. Why should you switch on dipped headlights before entering a tunnel?

To reduce tyre wear inside the tunnel.
To prevent the tunnel lights from becoming too bright.
To keep the windscreen from misting.
✓ To improve visibility and help other road users see you.

Tunnel lighting may be much darker than daylight. Dipped headlights help you see and make your vehicle more visible.

Vehicle using dipped headlights before entering a tunnel
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why must you take wider turns when towing a trailer?

576. Why must you take wider turns when towing a trailer?

Wider turns reduce the trailer's stopping distance.
Wider turns decrease tyre wear.
Wide turns prevent the trailer from swaying.
✓ The trailer follows a tighter path than the towing vehicle.

Trailer wheels cut closer to the inside of a turn. Allow enough clearance from kerbs, signs, pedestrians, and other vehicles.

Towing vehicle and trailer negotiating a turn
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do before driving after taking medicine?

577. What should you do before driving after taking medicine?

✓ Check whether it may affect your ability to drive.
Drive normally if the medicine was prescribed.
Drink coffee to prevent any side effects.
Take an extra dose before a long journey.

Some medicines can affect driving ability by causing drowsiness, dizziness, blurred vision, slower reactions, or reduced concentration. Check the label or patient information and follow advice from your doctor or pharmacist before driving.

Checking medicine warnings before driving
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do when reversing with a trailer?

578. What should you do when reversing with a trailer?

Make large steering corrections as soon as it turns.
✓ Reverse slowly and make small steering corrections.
Reverse quickly to keep the trailer straight.
Watch only the trailer and ignore surrounding traffic.

Trailers react quickly to steering while reversing. Move slowly, observe carefully, and use a guide only from a safe visible position.

Vehicle reversing with a trailer
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Why should an unused roof rack or roof box be removed?

579. Why should an unused roof rack or roof box be removed?

It increases tyre pressure.
It makes the steering wheel harder to turn.
✓ It can increase aerodynamic drag and energy use.
It reduces the vehicle's braking power.

An unused roof rack or roof box increases aerodynamic drag, particularly at higher speeds. Removing it when it is not needed can reduce fuel or energy consumption.

Roof rack or roof box fitted to a vehicle
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
What should you do before attempting to jump-start a vehicle?

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

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

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

Preparing to jump-start a vehicle battery
AI-generated by Traffic-rules.com • WCIT • CC BY-SA
Which selector position prevents drive being transmitted to the wheels?

581. Which selector position prevents drive being transmitted to the wheels?

✓ N (Neutral).
R (Reverse).
P (Park).
D (Drive).

Select N (Neutral) when drive should not be transmitted to the wheels. Unlike Park, Neutral does not lock the transmission to prevent the vehicle from rolling.

Automatic gear selector with P, R, N and D positions
AI-generated by Traffic-rules.com • WCIT • CC BY-SA