Ireland Driving Test 16 — Questions and Answers

Question 1: In wet weather how might a driver judge what is a safe following distance from the vehicle in front?

By allowing at least four seconds to elapse between the vehicle in front and the drivers own vehicle passing a fixed point. (Correct answer)
By driving at the same speed as the vehicle in front.
By allowing 4 vehicle lengths between the vehicles.
By allowing 2 seconds to elapse between the vehicle in front and your vehicle passing a fixed point.

Correct answer: By allowing at least four seconds to elapse between the vehicle in front and the drivers own vehicle passing a fixed point.

In wet weather, road surfaces become slippery, significantly increasing the distance required to stop a vehicle. The 'four-second rule' doubles the standard dry-weather following distance, providing crucial extra time and space for a driver to react and brake safely. This accounts for reduced tire grip and longer stopping distances on wet roads.

Question 2: What phrase is recommended for drivers to help them determine a ‘safe headway’ distance from the vehicle in front on a dry road?

Only a fool breaks the one second rule.
Only a fool breaks the four second rule.
Only a fool breaks the two second rule. (Correct answer)
Only a fool breaks the ten second rule.

Correct answer: Only a fool breaks the two second rule.

This phrase is a common mnemonic used in driver education to emphasize the importance of the 'two-second rule' for maintaining a safe following distance on dry roads. It serves as a memorable reminder that failing to adhere to this minimum time gap significantly increases the risk of a rear-end collision. The rule provides adequate time to react and stop safely under ideal conditions.

Question 3: What effect does carrying a load have on a vehicle’s braking ability?

It increases the efficiency of the brakes.
It increases the distance required to stop. (Correct answer)
It has no effect provided the brakes are in good condition.
It reduces the distance required to stop.

Correct answer: It increases the distance required to stop.

Carrying a load increases the overall mass of the vehicle. According to principles of physics, a greater mass requires more force and therefore a longer distance to decelerate and come to a complete stop. This is because the vehicle's inertia is higher, and the brakes have to work harder to overcome it.

Question 4: What effect does towing a loaded trailer have on stopping ability?

It significantly increases stopping distance. (Correct answer)
It has no effect.
It significantly reduces stopping distance.
It increases the efficiency of the brakes.

Correct answer: It significantly increases stopping distance.

Towing a loaded trailer adds substantial weight and momentum to the overall combination, dramatically increasing the vehicle's total mass. This additional mass requires significantly more braking force and a much longer distance to bring both the towing vehicle and the trailer to a complete stop. Drivers must account for this increased stopping distance by leaving extra space.

Question 5: What should a driver do when overtaking a large vehicle that is throwing up spray?

Speed up and drive faster.
Nothing is has no effect.
Move out earlier than normal and give extra clearance. (Correct answer)
Drive on high beam headlights only.

Correct answer: Move out earlier than normal and give extra clearance.

Large vehicles throwing up spray significantly reduce visibility for the overtaking driver. Moving out earlier and giving extra clearance allows the driver to minimize time spent in the spray, improving visibility and reducing the risk of a collision. It also provides a safer buffer zone in case the large vehicle unexpectedly changes speed or direction.

Question 6: What should a driver do when driving in dense fog?

Drive with dipped headlights and fog lights. (Correct answer)
Drive on sidelights only.
Drive on high beam headlights only.
Drive on sidelights and hazard warning lights.

Correct answer: Drive with dipped headlights and fog lights.

In dense fog, dipped headlights illuminate the road directly in front without reflecting glare back into the driver's eyes, which full beams would do. Fog lights are specifically designed to cut through fog and illuminate the road closer to the vehicle, further enhancing visibility. Using both maximizes the driver's ability to see and be seen without causing glare.

Question 7: What should a driver do when driving in dense fog?

Drive along the shoulder and watch for reflective markers.
Reduce speed and use dipped headlights. (Correct answer)
Switch on you full headlights and drive slowly.
Drive along the central dividing line and watch for the reflective studs.

Correct answer: Reduce speed and use dipped headlights.

Reducing speed is crucial in dense fog because visibility is severely limited, drastically reducing reaction and stopping distances. Dipped headlights are used to illuminate the road ahead without causing glare, which full beams would do by reflecting off the fog. This combination helps drivers maintain control and react safely to unseen hazards.

Question 8: When driving at night the full headlights should enable the driver to see for a distance of how many metres?

100 metres. (Correct answer)
150 metres.
200 metres.
250 metres.

Correct answer: 100 metres.

Full headlights are designed to provide maximum illumination for driving at higher speeds on unlit roads. The RSA guidelines specify that full headlights should enable a driver to see clearly for a distance of approximately 100 metres. This distance is essential for identifying hazards and reacting safely, especially at night.

Question 9: When driving at night the dipped headlights should enable the driver to see for a distance of how many metres?

60 metres.
20 metres.
10 metres.
30 metres. (Correct answer)

Correct answer: 30 metres.

Dipped headlights are designed for use when meeting or following other traffic, or in built-up areas, to avoid dazzling other road users. The RSA guidelines state that dipped headlights should allow a driver to see clearly for a distance of approximately 30 metres. This reduced range necessitates slower speeds and increased caution compared to driving with full beams.

Question 10: What effect could incorrectly adjusted headlights have?

Increase the stopping distance.
Reduces the wattage of the headlights.
Oncoming road users could be dazzled. (Correct answer)
Causes the headlights to overheat.

Correct answer: Oncoming road users could be dazzled.

Incorrectly adjusted headlights, particularly if aimed too high, can project light directly into the eyes of oncoming drivers or those in front. This dazzling effect temporarily impairs their vision, creating a dangerous situation where they may not see the road or other hazards clearly. Proper adjustment ensures light is directed onto the road surface.

Question 11: When driving at night, when must a driver dip the vehicle’s full headlights?

When meeting or driving behind other traffic. (Correct answer)
Approaching a bend or the brow of a hill.
Driving at less than 50 km\/h.
Entering a motorway.

Correct answer: When meeting or driving behind other traffic.

Full headlights are very powerful and can temporarily blind other drivers. To prevent dazzling oncoming vehicles or drivers in front, it is mandatory to dip headlights when meeting or following other traffic. This ensures the safety and visibility of all road users at night.

Question 12: When driving at night and blinded by the lights of an oncoming vehicle, what should a driver do?

Repeatedly flash their headlights until the oncoming vehicle's lights are dipped.
Look away and slow down and stop if necessary. (Correct answer)
Drive well to the left and maintain their speed.
Reduce speed and switch on their full headlights.

Correct answer: Look away and slow down and stop if necessary.

When blinded by oncoming lights, looking directly at them worsens the dazzling effect. Shifting your gaze slightly to the left edge of your lane helps maintain awareness of your position without direct glare. Reducing speed, or even stopping, is essential to regain full vision and control, ensuring safety until your eyes adjust.

Question 13: A driver has been driving regularly in daylight and must now undertake a journey at night. What should the driver do?

Drive at a higher speed than during the day as traffic is lighter at night.
Drive at a higher speed than during the day to minimize chances of falling asleep.
Drive at a slower speed than in the day as visibility is reduced at night. (Correct answer)
Drive at the same speed as during the day.

Correct answer: Drive at a slower speed than in the day as visibility is reduced at night.

Driving at night significantly reduces visibility compared to daylight hours, even with headlights. The limited range of headlights means hazards are seen later, requiring more time to react. Therefore, reducing speed is crucial to allow sufficient stopping distance within the visible range and compensate for reduced perception.

Question 14: What should a driver do when driving at night?

Drive at a speed that enables the driver to stop within the distance ahead that they can see to be clear. (Correct answer)
Increase their speed as traffic is lighter at night.
Turn up the radio volume to help maintain their concentration.
Drive at a higher speed than during the day to minimize chances of falling asleep.

Correct answer: Drive at a speed that enables the driver to stop within the distance ahead that they can see to be clear.

This is a fundamental principle of safe night driving, often called the 'limit of vision' rule. Because headlights have a limited range, a driver must adjust their speed so that they can stop completely within the illuminated area they can see. This ensures they can react to any unseen hazards that suddenly appear in their path.

Question 15: When driving at night, what is the safest approach for a driver to adopt?

Drive at a speed that enables the driver to stop within the distance ahead that they can see to be clear. (Correct answer)
Drive at a speed that enables the driver to stop within the distance ahead that they can see to be clear.
Drive with full headlights at all times.
Drive with full headlights and spotlights.

Correct answer: Drive at a speed that enables the driver to stop within the distance ahead that they can see to be clear.

This principle, known as the 'limit of vision' rule, is paramount for night driving safety. It dictates that a driver must always be able to stop their vehicle within the distance illuminated by their headlights. This ensures they have sufficient time to react to any obstacles or hazards that become visible, preventing collisions.

Question 16: When meeting an oncoming vehicle at night, what should a driver do?

Focus their eyes directly on its lights.
Not look directly at the oncoming vehicle's lights. (Correct answer)
Look down at the dash until it has passed so as not to be dazzled by its lights.
Focus their eyes toward the passenger's window.

Correct answer: Not look directly at the oncoming vehicle's lights.

Looking directly at the bright headlights of an oncoming vehicle can temporarily blind or dazzle a driver, impairing their vision and reaction time. Instead, drivers should shift their gaze slightly to the left edge of their lane or the white line, using their peripheral vision to monitor the oncoming vehicle while maintaining awareness of their own lane.

Question 17: When may a driver use full headlights when driving at night?

Between the hours of 1.00 a.m. and 6.00 a.m.
When there is no oncoming traffic. (Correct answer)
Between the hours of 11:30 p.m. and 7.00 a.m.
Only on main roads.

Correct answer: When there is no oncoming traffic.

Full headlights provide maximum illumination and are intended for use on unlit roads where there is no risk of dazzling other road users. They must be dipped immediately when meeting or following other vehicles to ensure the safety and visibility of all drivers.

Question 18: What lights should a driver have on when driving close behind other traffic at night?

Dipped headlights. (Correct answer)
Full headlights.
Fog lights.
Sidelights.

Correct answer: Dipped headlights.

When driving close behind another vehicle at night, full headlights would shine directly into the rear-view mirrors of the vehicle in front, causing severe glare and dazzling their driver. Dipped headlights provide sufficient illumination for the road ahead without impairing the vision of the driver in front, ensuring safety for both vehicles.

Question 19: When must a driver use dipped headlights?

When approaching roadworks.
When driving at less than 50 km\/h.
When approaching a bend or the brow of a hill.
When meeting or driving behind other traffic. (Correct answer)

Correct answer: When meeting or driving behind other traffic.

Dipped headlights are mandatory when meeting oncoming vehicles or driving behind other traffic at night. This prevents the powerful full beam headlights from dazzling other drivers, which could temporarily blind them and lead to dangerous situations. Using dipped beams ensures visibility for all road users.

Question 20: When driving late at night what should a driver be aware of?

That reflectorised studs will warn you of bends ahead.
That there is a danger of falling asleep. (Correct answer)
Trucks may drive in the outer lane of a motorway.
That speed limits do not apply between midnight and 6 a.m.

Correct answer: That there is a danger of falling asleep.

Driving late at night, especially after a long day or during natural sleep cycles, significantly increases the risk of driver fatigue and falling asleep at the wheel. Fatigue impairs judgment, reaction time, and alertness, making it extremely dangerous. Drivers should take breaks, get adequate rest, or avoid driving during these hours.

Question 21: What should a driver do if dazzled by the lights of an oncoming vehicle at night?

Look directly at the lights of the oncoming vehicle.
Turn your head to one side.
Shield your eyes with your hand.
Do not look directly at the lights. (Correct answer)

Correct answer: Do not look directly at the lights.

Looking directly at the bright headlights of an oncoming vehicle can cause temporary blindness or dazzling, severely impairing a driver's vision. To mitigate this, drivers should shift their gaze slightly to the left edge of their lane or the white line, using peripheral vision to maintain awareness while allowing their eyes to adjust.

Question 22: When driving at night, a single headlight approaches from ahead. What should a driver do?

Carry on because it can only be a motorcycle.
Be aware it may be a four-wheeled vehicle. (Correct answer)
Switch on your high beams as a warning.
Move to the centre of the road to improve your visibility of the oncoming vehicle.

Correct answer: Be aware it may be a four-wheeled vehicle.

While a single headlight often indicates a motorcycle, it's crucial to consider that a four-wheeled vehicle could have a broken or unlit headlight. Assuming it's only a motorcycle could lead to misjudging its size, speed, or position, creating a dangerous situation. Always exercise caution and prepare for the possibility of a larger vehicle.

Question 23: How might a driver know if there is black ice on the road?

Tyre pressure will seem heavier.
Steering will be heavy.
There will be louder tyre noise on the road.
There will be a decrease in road noise in the vehicle. (Correct answer)

Correct answer: There will be a decrease in road noise in the vehicle.

Black ice creates an extremely smooth, frictionless surface between the tires and the road. This lack of friction results in a noticeable reduction in the usual tire noise or 'road roar' heard inside the vehicle. A sudden quietness can be a subtle but critical indicator of black ice.

Question 24: How might a driver know if there is black ice on the road?

Use a low gear.
Drive with the choke on until you have cleared the area.
Steering will seem lighter. (Correct answer)
Increase tyre pressure to improve stability.

Correct answer: Steering will seem lighter.

Black ice significantly reduces the grip between the tires and the road surface. This loss of traction makes the steering feel unusually light or less responsive, as the tires have less resistance against the road. This sensation is a key indicator that the vehicle is losing grip and that black ice may be present.

Question 25: What should a driver do if there is black ice on the road?

Drive after rain in darkness.
Avoid harsh braking. steering and acceleration. (Correct answer)
Drive in mild weather after rain.
Drive after wet and windy weather.

Correct answer: Avoid harsh braking. steering and acceleration.

Black ice is extremely slippery and provides almost no grip, making it very dangerous. Harsh actions like sudden braking, sharp steering, or rapid acceleration can easily cause the vehicle to lose control and skid. To maintain what little traction is available, drivers must use gentle and smooth inputs for all controls.

Ireland Driving Test 16

In wet weather how might a driver judge what is a safe following distance from the vehicle in front?