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Difficulty: EasySeparation Distances and the Two-Second Rule

According to the UK Highway Code, drivers must increase their following distance in adverse weather. Match each road surface condition with the minimum safe time separation gap required when following another vehicle.

  • Good, dry road conditionsA minimum time gap of 2 seconds
  • Wet road surface during or after rainfallA minimum time gap of 4 seconds (doubled)
  • Icy or snow-covered road surfaceA minimum time gap of 20 seconds (ten times)

Answer

Good, dry road conditions match with 2 seconds; Wet road surface matches with 4 seconds (doubled); Icy or snow-covered road surface matches with 20 seconds (ten times).
The UK Highway Code specifies a minimum 2-second separation gap on dry roads. In wet weather, tyre traction is significantly reduced, requiring the gap to be doubled to 4 seconds. On icy or snow-covered roads, braking capability is severely compromised, requiring up to ten times the normal gap, or 20 seconds.

Step-by-Step Solution

1
Identify the baseline following distance rule for normal conditions
The two-second rule applies to clear, dry roads
The Highway Code establishes a 2-second time gap as the standard minimum separation distance on dry asphalt.
2
Apply the multiplier for wet road conditions
2 seconds multiplied by 2 equals 4 seconds
Tyre grip is halved on wet surfaces, meaning the separation gap must be doubled.
3
Apply the multiplier for icy and snowy road conditions
2 seconds multiplied by 10 equals 20 seconds
Friction is severely compromised on ice, requiring up to ten times the standard separation distance.

Key Concept

Highway Code separation distance multipliers based on weather and road surface conditions
Estimated Time:45s
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Topics

Separation Distances and the Two-Second Rule

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