DGT B licence questions: Factors that impair driving ability

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Question index View topic Practise Factors that impair driving ability

As a usual guide, when does blood alcohol concentration tend to reach its maximum after drinking?
How does cannabis affect driving?
A tired driver...
Can a respiratory allergy reduce the ability to maintain concentration in traffic?
What effect may a cold, or some medicines used to relieve it, have on driving?
What is the time that elapses from the recognition of a hazard to the start of the reaction called?
On a long passenger-car trip, to prevent fatigue it is advisable to rest approximately:
Among its effects on driving, alcohol can cause...
Can fatigue alter the driver's reaction time?
If you mix drugs with alcohol...
At an alcohol check, which of these rights does Article 23 recognise regarding the two breath tests?
In the terminology used by the DGT, which system warns of driver distraction?
In relation to driving and as a general rule, the improper consumption of medication increases...
If you are overtaken by drowsiness while driving, you must...
On working days, which journeys can concentrate traffic during peak hours on approaches to urban areas?
Accidents caused by drowsiness occur...
Under the effects of heat, it is possible that...
Can depression affect drowsiness and fatigue when driving?
For the same reaction time, how does increasing speed affect the distance travelled before starting to brake for a hazard?
Can alcohol reduce the driver's field of vision?
Alcohol is absorbed more quickly if ...
According to general DGT guidance, when is the highest blood-alcohol concentration usually reached after finishing drinking?
Can you drive if you have taken any medication?
People who drink and drive…
Among other effects, the consumption of alcohol…
Why is driving while sleepy dangerous?
Does chewing gum or eating sweets reduce the blood alcohol level?
Non-medical amphetamine use, during its stimulant effect, can...
Among its possible effects, what visual impairment can alcohol cause?
Is it advisable to drive at night to avoid tiredness?
What may happen to reaction time under a tranquiliser’s sedative effect?
Are all medicines dangerous when driving?
A driver under the effects of alcohol...
If a medicine can affect attention or reaction time while driving a passenger car or other vehicle covered by a B licence:
Why can limited experience increase a young driver’s risk?
If you feel fatigue or drowsiness while driving, what should you do?
Intense stress can cause a driver to...
To drive safely, the driver must...
How can depression affect driving?
According to the INTCF’s 2024 traffic report, what proportion of the deceased drivers tested were positive for alcohol, drugs and/or…
If you maintain the same speed, what effect can fatigue at the wheel produce?
Can excessive heat inside the vehicle increase the risk when driving?
In a medical alcohol confirmation test, may urine analysis be used in justified exceptional cases where appropriate?
Can stress, anxiety or depression distract the driver?
After drinking alcohol, does eating food or drinking water rapidly remove alcohol already in the blood so that you can drive?
One of the factors that contributes to accidents among young drivers is...
Can a novice driver feel tired more easily?
If you suffer from a seasonal respiratory allergy, to drive more safely during the time of year when your symptoms are strongest, it is…
Does fatigue influence the effects produced by alcohol?
Can the risk of having an accident be reduced if you have a chronic illness?
Can using a mobile phone with a "hands-free" system while driving affect the driver's ability to concentrate?
Can stress, anxiety or depression cause the driver to lose concentration at the wheel?
Can recreational amphetamine use make driving dangerous?
Can stress alter your ability to drive safely?
Can searching for a radio station or handling the music player distract the driver?
The likelihood of having a traffic accident...
A person who drives under the influence of drugs...
Can recreational drug use increase the risk of a serious collision even when not combined with alcohol?
Can you feel a greater sense of fatigue if you suffer from stress?
When we take alcohol together with other drugs...
Excessive heat inside the vehicle...
Medications that don't need a medical prescription...
Does driving while experiencing the symptoms of a respiratory allergy increase the risk of having an accident?
Are inadequate speed, alcohol and illness considered risk factors?
Can a common cold affect your ability to drive?
Does alcohol affect everyone in the same way?
Can a very high temperature inside the vehicle's cabin affect the driver's reaction time?
Which age groups does the DGT highlight as more sensitive to the effects of alcohol?
What behavioural changes can alcohol cause in a driver?
Does drinking coffee or tea reduce your blood alcohol level?
Which of these actions can distract the driver while the vehicle is moving?
Does sleeping for a few hours after drinking guarantee that alcohol has been eliminated and you can drive safely?
Is driving while tired dangerous?
If fatigue appears while driving a passenger car or other vehicle covered by a B licence, the safest action is to:
Accidents caused by drowsiness occur...
Can abused or illegal drugs impair a driver’s reaction ability?
It is important to avoid heavy meals during journeys because they can cause...
Which of these situations can contribute to drowsiness while driving?
Can the risk of having an accident be reduced if you suffer from a chronic illness?
An adult driver subject to a positive alcohol limit has consumed alcohol but is below their applicable legal limit. Can they still have a…
Does taking a nap eliminate alcohol more quickly?
Which of these road characteristics can contribute to driver fatigue or drowsiness?
Do all people respond in the same way when taking the same medication?
Can tiredness alter a driver's reaction time?
When alcohol is consumed, the driver...
Which products can impair driving ability in a similar way to alcohol?
As general DGT guidance, within what interval after consumption may peak blood alcohol concentration be reached?
At the same travel speed, if alcohol lengthens reaction time, what happens to reaction distance?
Can psychoactive drugs impair the ability to drive safely?
What should a driver who feels sleepy do?
If a driver is undergoing treatment and taking certain medicines, such as painkillers or antihistamines, it is advisable that...
The circumstances that increase the likelihood of an accident occurring are called...
Can taking stimulant drinks prevent sleepiness?
Does the percentage of tested deceased drivers positive for alcohol, drugs or psychoactive medicines by itself equal the percentage of all…
Can a medicine available without prescription adversely affect driving ability?
If a medicine causes sleepiness or reduces attention so that you cannot drive safely, may you drive even without having consumed alcohol?
Can drugs of abuse distort risk perception and encourage dangerous driving decisions?
If you have taken narcotics or psychotropic substances that alter your mental state, are you allowed to drive a vehicle?
Which factors can cause fatigue in a driver?
May the Authority require a cyclist to take a breathalyser test?