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Question

Difficulty: EasySkid Control and Recovery

If hard application of the service brakes on an icy bridge causes the rear drive wheels to lock up and slide sideways, what immediate action should the driver take to regain directional control?

  1. A
    Steer firmly in the opposite direction of the rear-end skid without adjusting pedal pressure
  2. Release the service brakes to allow the wheels to start rolling againAnswer
  3. C
    Engage the engine retarder immediately to assist the locked wheels in slowing down
  4. D
    Apply harder braking pressure until the vehicle comes to a complete halt across the roadway

Answer

Release the service brakes to allow the wheels to start rolling again
Releasing the service brakes eliminates the braking force that locked the drive wheels. Once the wheels start rolling freely again, they regain the lateral traction necessary to stabilize the vehicle and follow the driver's steering input.

Step-by-Step Solution

1
Identify the cause of the skid as drive-wheel lockup resulting from excessive brake application.
Recognize that braking force exceeds tire traction on the icy surface.
Locked wheels cannot generate the lateral force needed for steering and directional stability.
2
Release the brake pedal immediately and steer into the direction of the skid.
The drive wheels begin rolling freely, restoring tire grip and directional control.
Rolling wheels regain the cornering traction required to guide the vehicle back into alignment.

Key Concept

Drive-wheel braking skid recovery requires stopping the braking action so the locked wheels can roll and restore traction.
Estimated Time:45s
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Topics

Skid Control and Recovery

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