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Difficulty: HardFatigue and Driver Condition

A driver is preparing to undertake a five-hour continuous journey across England to attend an early morning appointment. What is the safest and most effective way to plan and manage this journey to minimise the risk of driver fatigue?

  1. A
    Increase cruising speed within allowable limits to complete the trip faster before physical exhaustion sets in
  2. B
    Drive continuously between 01:00 and 06:00 to avoid daytime congestion, relying on cold air ventilation to stay awake
  3. Schedule at least two 15-minute rest breaks during the trip and avoid driving between midnight and 06:00Answer
  4. D
    Plan a single five-minute rest stop after four hours of driving and rely on caffeinated drinks from the start of the trip

Answer

Schedule at least two 15-minute rest breaks during the trip and avoid driving between midnight and 06:00
According to Rule 91 of The Highway Code, drivers must properly plan their journey to include a break of at least 15 minutes after every two hours of driving. Furthermore, drivers should avoid long journeys between midnight and 06:00, when natural alertness is at its lowest level.

Step-by-Step Solution

1
Calculate required rest intervals according to standard driving safety guidelines
A 5-hour journey requires planned stops after every 2 hours of driving, meaning at least two separate rest breaks of no less than 15 minutes each.
Rule 91 of The Highway Code specifies that drivers should take a minimum break of at least 15 minutes after every two hours of driving to prevent cognitive and physical fatigue.
2
Account for natural human circadian rhythms when scheduling departure times
Avoid undertaking long journeys between midnight and 06:00.
The body's natural circadian rhythm causes a significant dip in alertness during early morning hours, exponentially increasing the probability of microsleeps and fatal collisions.
3
Evaluate and dismiss ineffective fatigue mitigation strategies
Artificial methods such as cold air, loud music, excessive speed, or premature caffeine consumption cannot substitute for genuine rest.
Only structured rest periods in a safe location allow the brain and nervous system to recover necessary alertness.

Key Concept

Highway Code Rule 91 on driver fitness, minimum rest intervals, and circadian rhythm management
Estimated Time:1m 30s
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Topics

Fatigue and Driver Condition

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