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Difficulty: MediumSpeed Control and Following Distance

While driving on a highway during a heavy rainstorm, you are following a passenger car on wet pavement. Under these adverse weather and road surface conditions, what is the minimum following distance you should maintain to ensure safe stopping margin?

  1. A
    The standard 3-second following distance, because posted speed limits automatically account for wet road conditions.
  2. At least 4 to 5 seconds, because wet pavement reduces tire traction and significantly increases braking distance.Answer
  3. C
    A reduced 2-second following distance, provided you maintain your vehicle's position directly in the tire tracks of the leading car.
  4. D
    The standard 3-second following distance, provided your windshield wipers and low-beam headlights are activated.

Answer

At least 4 to 5 seconds, because wet pavement reduces tire traction and significantly increases braking distance.
The correct answer specifies expanding the buffer zone to at least 4 to 5 seconds. On wet pavement, tire friction decreases, significantly increasing the physical distance required to bring a vehicle to a complete stop. Adding extra seconds ensures sufficient reaction and stopping time.

Step-by-Step Solution

1
Identify the driving conditions described in the scenario.
The scenario specifies heavy rain and wet pavement while following another vehicle on a highway.
Road surface condition directly dictates available tire traction and stopping requirements.
2
Apply following distance principles for adverse weather conditions.
Standard dry-pavement following distance is at least 3 seconds. On wet roads, reduced friction increases stopping distance, requiring an expanded buffer of 4 to 5 seconds.
Additional seconds provide adequate reaction time and stopping space to prevent rear-end collisions.

Key Concept

Speed and Following Distance Adjustment in Adverse Weather
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Topics

Speed Control and Following Distance

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