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Difficulty: MediumSkid Control and Recovery

While turning through an intersection covered in wet slush, a commercial vehicle's front tires lose grip, causing the vehicle to slide straight ahead regardless of steering input. To regain directional control, which action should the driver take?

  1. A
    Apply firm pressure to the service brakes while keeping the wheels turned sharply into the curve.
  2. B
    Activate the engine retarder to transfer braking force to the drive axle and force the front end down.
  3. Stop braking and ease off excessive steering input to allow the front tires to roll and restore traction.Answer
  4. D
    Turn the steering wheel rapidly back and forth in the opposite direction of the turn to break the slide.

Answer

Stop braking and ease off excessive steering input to allow the front wheels to roll and restore cornering traction.
In a front-wheel skid, the vehicle continues straight ahead because the front tires have exceeded their traction limit. The only effective recovery method is to stop braking, avoid turning the wheel even harder, and let the vehicle slow down so the tires can resume rolling and regain steering grip.

Step-by-Step Solution

1
Recognize the condition as a front-wheel skid (understeer), where sliding tires cannot generate lateral turning forces.
Identify that additional braking or increased steering angle will maintain the slide rather than correct it.
A locked or sliding tire has significantly less grip than a rolling tire.
2
Release any brake application and reduce the steering angle slightly toward center.
The front wheels begin rolling again over the road surface.
Rolling friction re-establishes directional control, allowing the vehicle to respond to steering inputs once traction is restored.

Key Concept

Front-wheel skid recovery requires letting the vehicle slow down naturally while ceasing braking and excessive steering to allow the front tires to roll and regain steering traction.
Estimated Time:1m 0s
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Topics

Skid Control and Recovery

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