Führerschein Alkohol, Drogen und Fahruntüchtigkeit 2 — Questions and Answers
Question 1: Which of the following substances makes it illegal to drive in Germany if detected above a legal threshold?
- Caffeine
- Cannabis (THC) (Correct answer)
- Vitamin supplements
- Melatonin
Correct answer: Cannabis (THC)
Driving under the influence of cannabis (THC) above the legal threshold is prohibited in Germany, with a limit of 3.5 ng/ml in blood serum following the 2024 reform.
Question 2: Following Germany's 2024 cannabis law reform, what is the THC blood serum limit for drivers?
- 0 ng/ml (zero tolerance)
- 1.0 ng/ml
- 3.5 ng/ml (Correct answer)
- 10.0 ng/ml
Correct answer: 3.5 ng/ml
Following the 2024 cannabis reform, Germany set the THC limit for driving at 3.5 ng/ml in blood serum — similar in principle to the BAC system for alcohol.
Question 3: How does fatigue (Müdigkeit) affect a driver's ability compared to alcohol intoxication?
- Fatigue has no effect if the driver feels mentally alert
- Fatigue causes effects similar to alcohol, including impaired judgment and slower reactions (Correct answer)
- Fatigue only impairs vision, not reaction speed
- A 5-minute break fully eliminates fatigue effects while driving
Correct answer: Fatigue causes effects similar to alcohol, including impaired judgment and slower reactions
Fatigue impairs driving similarly to alcohol — it slows reactions, reduces concentration, and can cause involuntary microsleep episodes.
Question 4: What is 'Sekundenschlaf' (microsleep) and why is it dangerous while driving?
- A defensive driving technique used on highways
- Brief involuntary sleep episodes lasting 1–30 seconds that cause complete loss of vehicle control (Correct answer)
- A legal term for impaired driving behavior under fatigue
- A type of visual fatigue causing tunnel vision on long drives
Correct answer: Brief involuntary sleep episodes lasting 1–30 seconds that cause complete loss of vehicle control
Sekundenschlaf (microsleep) refers to brief involuntary sleep episodes of 1–30 seconds during which the driver has absolutely no awareness or control of the vehicle.
Question 5: What effect should drivers be aware of when taking antihistamine medication before driving?
- They improve night vision and are safe for all driving conditions
- They can cause significant drowsiness and impair driving ability (Correct answer)
- They have no effect on driving ability if taken with food
- They are legally classified as safe for driving and require no warnings
Correct answer: They can cause significant drowsiness and impair driving ability
Many antihistamines cause drowsiness as a side effect, which can significantly impair reaction time and driving ability — the medication label typically warns against operating machinery.
Question 6: What typically happens when a driver combines alcohol with prescription sedatives or painkillers?
- The effects cancel each other out, making driving safer
- The medication eliminates alcohol's impairing effects on reaction time
- The combined effect is often stronger and more dangerous than either substance alone (Correct answer)
- The alcohol only speeds up medication absorption without affecting driving
Correct answer: The combined effect is often stronger and more dangerous than either substance alone
Combining alcohol with sedatives or painkillers typically produces a synergistic effect — the combined impairment is far greater and more dangerous than either substance would cause independently.
Question 7: What is the most effective action to take when feeling fatigued during a long drive?
- Open the windows for fresh air and continue at a lower speed
- Drink coffee and drive faster to reach the destination sooner
- Stop at a rest area and sleep for at least 20 minutes (Correct answer)
- Turn up the radio volume and switch to the left lane to stay alert
Correct answer: Stop at a rest area and sleep for at least 20 minutes
The only truly effective remedy for driving fatigue is to stop and rest — a sleep break of at least 20 minutes significantly restores alertness; stimulants provide only temporary relief.
Führerschein Alkohol, Drogen und Fahruntüchtigkeit 2
Which of the following substances makes it illegal to drive in Germany if detected above a legal threshold?