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Difficulty: EasyHydroplaning and Wet Road Traction Loss

What effect does driving with severely worn tire tread have on a vehicle traveling over standing water on a wet highway?

  1. It significantly reduces the tires' ability to channel water away, increasing the risk of hydroplaning at lower speeds.Answer
  2. B
    It allows the driver to safely maintain the posted speed limit in heavy rain without risking traction loss.
  3. C
    It improves wet road traction by creating a smoother surface area to grip the damp pavement.
  4. D
    It forces the anti-lock braking system (ABS) to automatically engage and prevent water buildup.

Answer

Severely worn tire tread reduces the tires' ability to channel water away from the contact patch, causing the vehicle to hydroplane at lower speeds.
Tire tread grooves are engineered to evacuate water from under the tire. When tread depth is insufficient, water cannot escape, causing a layer of water to build up between the tire and road surface. This lifts the vehicle's tires off the pavement and results in hydroplaning even at moderate speeds.

Step-by-Step Solution

1
Identify the main function of tire tread in wet weather.
Tire tread grooves provide channels through which standing water on the road surface is expelled as the tire rotates.
Effective water removal maintains direct contact between the rubber and the road surface.
2
Analyze the impact of reduced tread depth on hydroplaning.
Without deep grooves, water builds up beneath the tire footprint faster than it can escape.
This hydrodynamic pressure lifts the tires completely off the road surface, causing hydroplaning at significantly lower speeds than with new tires.

Key Concept

Tire Tread Depth and Hydroplaning Prevention
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Topics

Hydroplaning and Wet Road Traction Loss

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