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Difficulty: EasyEvasive Steering and Avoiding Collisions

A commercial motor vehicle driver needs to perform an emergency evasive maneuver to steer around a sudden stationary hazard. Arrange the following steps in the correct chronological order to safely execute the maneuver and stabilize the vehicle.

  1. 1Turn the steering wheel firmly toward the clear escape path without applying the brakes.
  2. 2Navigate past the obstruction along the escape path.
  3. 3Counter-steer in the opposite direction to control lateral sway and prevent a skid.
  4. 4Straighten the steering wheel to stabilize the commercial vehicle in a straight trajectory.

Answer

1. Turn the steering wheel firmly toward the clear escape path without applying the brakes. 2. Navigate past the obstruction along the escape path. 3. Counter-steer in the opposite direction to control lateral sway and prevent a skid. 4. Straighten the steering wheel to stabilize the commercial vehicle in a straight trajectory.
Executing an evasive maneuver requires steering without braking first to maintain traction, clearing the obstacle, immediately counter-steering to arrest lateral momentum, and finally straightening the wheels to stabilize the vehicle.

Step-by-Step Solution

1
Initiate evasive steering into the clear escape path while keeping feet completely off the brake pedal.
The commercial vehicle begins moving laterally around the obstacle without locking the steer axle wheels.
Braking while turning sharply can cause wheel lockup, skids, and loss of steering control.
2
Allow the vehicle to safely pass the obstruction along the escape route.
The vehicle avoids colliding with the hazard.
Corrective steering cannot begin until the entire vehicle has safely cleared the obstruction.
3
Counter-steer in the opposite direction of the initial turn.
The vehicle's lateral momentum is arrested, preventing the rear of the vehicle from sliding out.
Counter-steering is necessary to stabilize a heavy vehicle and prevent rollovers or jackknife events.
4
Return the steering wheel to the center position.
The commercial vehicle stabilizes and travels in a straight line.
Straightening the wheels completes the recovery and restores standard lane control.

Key Concept

Evasive Steering and Counter-Steering Sequence
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Topics

Evasive Steering and Avoiding Collisions

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