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Question

Difficulty: EasySpeed Control and Following Distance

You are driving behind a passenger car on a dry, paved road with clear weather and light traffic. To ensure a safe following cushion, what is the minimum recommended following distance you should maintain?

  1. At least 3 secondsAnswer
  2. B
    At most 1 second
  3. C
    Always drive at the maximum posted speed limit regardless of the distance to the car ahead
  4. D
    Exactly one car length for every 30 mph of speed

Answer

At least 3 seconds of following distance should be maintained under normal driving conditions.
Under normal, dry road and clear weather conditions, driver safety standards specify maintaining at least a 3-second following distance. This interval ensures adequate perception-reaction time and stopping distance if the leading vehicle brakes suddenly.

Step-by-Step Solution

1
Identify the standard safety guideline for following distance under normal, dry weather conditions.
The standard safe following distance recommended by driver safety manuals is the 3-second rule.
The 3-second rule accounts for human reaction time and the physical stopping distance required for passenger vehicles at various speeds.
2
Evaluate the options against safe driving practices.
Maintaining at least 3 seconds ensures adequate space cushion, whereas shorter intervals or fixed car-length rules are unsafe or insufficient.
Shorter times do not allow sufficient reaction buffer if the vehicle ahead stops suddenly.

Key Concept

The Three-Second Rule for Following Distance
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Topics

Speed Control and Following Distance

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