Question

Difficulty: MediumNight Driving and Headlight Glare Management

When driving on an unlit roadway at night, a driver realizes that their vehicle's stopping distance exceeds the range illuminated by their low-beam headlights. Which action should the driver take to avoid a collision?

  1. Reduce speed until the stopping distance is within the illuminated range ahead.Answer
  2. B
    Maintain speed while repeatedly flashing high beams to detect hazards earlier.
  3. C
    Keep high-beam headlights on continuously regardless of approaching traffic.
  4. D
    Increase speed slightly to minimize the time spent driving on unlit stretches.

Answer

Reduce speed until the stopping distance is within the illuminated range ahead.
Slowing down is the correct action because overdriving headlights occurs when a driver travels at a speed where stopping distance is greater than the illuminated area ahead. Lowering speed ensures the vehicle can come to a safe stop before reaching any hazard seen in the headlights.

Step-by-Step Solution

1
Identify the hazard associated with nighttime visibility range.
Recognize that overdriving headlights occurs when stopping distance exceeds illumination distance.
If an obstacle appears in the dark beyond illumination, the vehicle cannot stop in time at current speed.
2
Apply basic speed law principles to low-visibility driving.
Slowing down decreases braking distance to match the visible road distance.
Drivers must adjust speed to match existing road conditions and visibility.

Key Concept

Overdriving Headlights and Nighttime Speed Control
Estimated Time:1m 0s
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