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Difficulty: MediumSeparation Distances and the Two-Second Rule

You are driving along a motorway in good, dry conditions. As the vehicle ahead passes an overhead gantry sign, you count your separation time and find that you reach the same sign in just over one second. What action should you take?

  1. A
    Maintain your current speed because a one-second gap provides sufficient thinking room in dry weather
  2. Ease off the accelerator and increase the gap until you are at least two seconds behindAnswer
  3. C
    Brake firmly immediately to match your vehicle's braking distance to the vehicle ahead
  4. D
    Keep close to the vehicle ahead and fixate purely on its brake lights to detect deceleration quickly

Answer

Ease off the accelerator and increase the gap until you are at least two seconds behind.
In good, dry conditions, drivers must maintain at least a two-second separation gap from the vehicle in front. If you count the interval between the leading vehicle passing a stationary reference point (such as an overhead gantry) and your vehicle reaching it, and the time is under two seconds, you are following too closely. The correct and safe response is to ease off the accelerator until a full two-second buffer is restored.

Step-by-Step Solution

1
Evaluate the current time gap against the standard Highway Code guideline for dry road conditions.
The measured gap of just over one second is less than the required minimum two-second margin.
The two-second rule provides the minimum time needed for thinking and braking distances combined under normal dry conditions.
2
Determine the correct driving adjustment to safely extend the following distance.
Gently ease pressure on the accelerator to allow the distance between vehicles to widen until at least a two-second interval is established.
Gradual deceleration avoids shocking following traffic while re-establishing a safe buffer.

Key Concept

Applying and restoring the two-second following distance rule on high-speed roads
Estimated Time:45s
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Topics

Separation Distances and the Two-Second Rule

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