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Difficulty: EasyFactors Affecting Thinking Distance

You are driving along a rural road late in the evening. Which of the following factors will directly increase your thinking distance?

  1. A
    Worn brake pads on your vehicle
  2. Being tired after a long day at workAnswer
  3. C
    A wet and slippery road surface
  4. D
    Under-inflated tyres on the car

Answer

Being tired after a long day at work will directly increase your thinking distance.
Thinking distance is the distance a vehicle travels in the time between a driver identifying a hazard and physically applying the footbrake. Tiredness slows the driver's cognitive processing and motor reaction, causing the car to travel further before braking commences.

Step-by-Step Solution

1
Distinguish between thinking distance and braking distance.
Thinking distance is the distance travelled during driver reaction time before brakes are applied; braking distance is the distance travelled while the vehicle is coming to a stop under braking.
Overall stopping distance comprises thinking distance plus braking distance.
2
Identify which factor impacts driver reaction time rather than mechanical or environmental braking capability.
Driver fatigue impairs alertness and slows response time, directly extending the distance travelled before pressing the brake pedal.
Vehicle components (brakes, tyres) and environmental conditions (wet roads) affect braking distance, whereas driver physical and mental state affects thinking distance.

Key Concept

Thinking distance is determined solely by vehicle speed and driver reaction time, which is lengthened by factors such as tiredness, alcohol, drugs, or distractions.
Estimated Time:45s
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Topics

Factors Affecting Thinking Distance

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