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Difficulty: HardSkidding and Control Loss Recovery

While descending a slick, rain-soaked hill in a vehicle without an anti-lock braking system (ABS), a driver applies heavy brake pressure and experiences a locked-wheel skid, causing the vehicle to slide straight downhill regardless of steering wheel adjustments. Which of the following actions should the driver perform first to regain directional control of the vehicle?

  1. Release the brake pedal completely to allow the wheels to resume rolling and re-establish traction for steering.Answer
  2. B
    Turn the steering wheel rapidly back and forth while maintaining maximum pressure on the brake pedal.
  3. C
    Shift the transmission into neutral and engage the emergency parking brake firmly.
  4. D
    Maintain heavy brake pressure while depressing the accelerator slightly to transfer weight forward.

Answer

Release the brake pedal completely to allow the wheels to resume rolling and re-establish traction for steering.
Releasing the brake pedal allows the locked tires to unlock and resume rolling. Rolling tires re-establish directional grip with the road surface, enabling front tires to steer the vehicle along the desired path.

Step-by-Step Solution

1
Diagnose the vehicle dynamics.
Recognize that a locked-wheel skid is occurring because excessive brake force locked all four wheels on non-ABS brakes, removing all steering control.
Locked tires sliding over a wet road surface cannot produce lateral cornering forces.
2
Remove foot pressure from the brake pedal entirely.
Brake pad friction drops to zero, allowing the wheels to unlock and match the vehicle's road speed.
Rolling friction must be restored before front tires can respond to steering inputs.
3
Steer smoothly in the intended direction of travel.
The vehicle responds to steering commands, re-establishing directional stability.
Tires that are turning freely regain grip and obey steering wheel rotation.

Key Concept

Locked-Wheel Skid Recovery (Non-ABS)
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Topics

Skidding and Control Loss Recovery

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