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Difficulty: MediumEvasive Steering and Avoiding Collisions

A commercial driver must execute a sudden lane change to clear an unexpected roadway obstruction when stopping distance is insufficient. Immediately after steering sharply to bypass the obstacle, which action must the driver take to maintain vehicle control and prevent a rollover?

  1. A
    Apply firm, continuous service brake pressure while holding the initial steering angle until the vehicle stops
  2. Counter-steer by turning the steering wheel back in the opposite direction to stabilize the vehicle in the new pathAnswer
  3. C
    Release the steering wheel completely to allow mechanical steering gear play and caster angle to self-center the steer tires
  4. D
    Maintain the evasive steering angle until trailing distance matches the standard following distance formula

Answer

Counter-steer by turning the steering wheel back in the opposite direction to stabilize the vehicle in the new path.
According to standard commercial driving principles, steering quickly is often faster than stopping to avoid an obstacle, but the maneuver is not complete once the hazard is cleared. The driver must be prepared to immediately counter-steer (turn the wheel in the opposite direction) to arrest lateral momentum, straighten the vehicle, and keep it safely within the lane.

Step-by-Step Solution

1
Analyze the dynamics of an evasive steering maneuver in a commercial vehicle.
Recognize that steering sharply initiates lateral momentum and changes vehicle trajectory to clear the hazard.
Commercial motor vehicles have a high center of gravity and significant momentum during abrupt directional changes.
2
Determine the required recovery action immediately following hazard clearance.
Identify that counter-steering (turning the steering wheel in the opposite direction) is required to straighten the vehicle.
Without prompt counter-steering, the vehicle will continue its lateral drift, resulting in roadway departure, secondary collisions, or rollovers.
3
Evaluate braking and steering restrictions during the maneuver.
Confirm that braking must be avoided while making sharp turns and active control must be retained at all times.
Applying brakes during sharp steering locks steer or drive wheels, causing complete loss of steering control.

Key Concept

Counter-steering and vehicle stabilization during emergency evasive maneuvers
Estimated Time:1m 0s
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Topics

Evasive Steering and Avoiding Collisions

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