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Difficulty: MediumHydroplaning and Wet Road Traction Loss

While driving on a wet highway during rain, a driver approaches a section of road with standing water. Which of the following factors significantly increases the risk of the vehicle hydroplaning?

  1. Driving with underinflated tires or severely worn tread patterns.Answer
  2. B
    Abruptly slamming on the brakes upon entering standing water to quickly reduce speed.
  3. C
    Continuing at the posted maximum speed limit assuming it is safe because it is legal.
  4. D
    Turning off cruise control prior to traveling through wet or flooded sections of pavement.

Answer

Driving with underinflated tires or severely worn tread patterns.
Low tire tread depth and improper inflation severely restrict the tire's ability to displace water from beneath the rubber contact area. As a result, water pressure accumulates rapidly under the tire, lifting it off the road surface and eliminating steering control.

Step-by-Step Solution

1
Analyze the physical cause of hydroplaning
Hydroplaning occurs when water pressure in front of the tire forces a layer of water under the tire, separating it from the road surface.
Tires rely on tread grooves to channel water out from under the contact patch to maintain friction.
2
Identify key vehicle maintenance factors affecting wet traction
Inadequate tread depth or improper tire inflation dramatically reduces the volume of water the tire can clear, causing traction loss at lower speeds.
Sufficient tread depth and proper inflation pressure are essential physical preventatives against water film separation.

Key Concept

Hydroplaning Causes and Tire Condition
Estimated Time:1m 0s
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Topics

Hydroplaning and Wet Road Traction Loss

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