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Difficulty: MediumEvasive Steering and Avoiding Collisions

You are operating a commercial motor vehicle at 50 mph when a vehicle suddenly stalls in your lane directly ahead, and you do not have enough distance to come to a complete stop. Which of the following procedures is correct when executing an evasive steering maneuver to avoid a collision?

  1. A
    Apply maximum brake pressure while simultaneously executing a sharp turn to minimize vehicle speed during the maneuver.
  2. Steer only as much as needed to clear the obstacle without applying the brakes while turning, and counter-steer immediately once clear.Answer
  3. C
    Turn the steering wheel more than a full revolution into the opposite lane and hold that angle until the vehicle stops completely.
  4. D
    Maintain your lane position and rely solely on following distance cushions, expecting the obstruction to clear before impact.

Answer

Steer only as much as needed to clear the obstacle without applying the brakes while turning, and counter-steer immediately once clear.
According to commercial driving safety standards, a driver can almost always turn to avoid an obstacle more quickly than making a full stop. When executing an evasive maneuver, you should never brake while turning because braking can lock the wheels and cause an uncontrollable skid. Additionally, you should turn only as much as necessary to clear the hazard and counter-steer immediately to stabilize the vehicle.

Step-by-Step Solution

1
Recognize that steering is quicker than stopping when an immediate obstacle cannot be cleared by braking alone.
Evasive steering is chosen as the primary collision avoidance technique.
Commercial vehicles require significant stopping distance, making lateral evasive movement faster and safer in close-range emergencies.
2
Turn the steering wheel smoothly without applying the service brakes during the turn.
Tires maintain rolling traction without locking up or initiating an uncontrolled skid.
Braking while turning sharply can cause wheel lockup, loss of steering control, and vehicle rollover.
3
Counter-steer as soon as the vehicle clears the obstacle to stabilize the vehicle back into a controlled path.
The commercial vehicle recovers straight-line trajectory safely.
Counter-steering prevents the rear of the vehicle from swinging out or leaving the roadway.

Key Concept

Evasive steering principles: steering is quicker than stopping, avoid braking during sharp turns, and counter-steer immediately after clearing obstacles.
Estimated Time:1m 0s
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Topics

Evasive Steering and Avoiding Collisions

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