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Difficulty: MediumEvasive Steering and Avoiding Collisions

When executing an evasive steering maneuver to avoid an imminent hazard, applying hard brake pressure while simultaneously making a sharp steering turn helps stabilize the vehicle and minimizes the risk of a rollover or skid.

Answer: Answer

Answer

False
The statement is false because commercial driving standards explicitly instruct drivers not to brake while making a sharp evasive turn. Braking during a sharp steering maneuver risks locking the wheels, which robs the driver of steering control and drastically elevates the likelihood of skids and rollovers.

Step-by-Step Solution

1
Analyze the vehicle physics involved when applying hard brakes during a sharp steering turn.
Simultaneous hard braking and sharp turning overloads tire traction limits.
Tires possess a limited amount of traction that must be shared between lateral (steering) forces and longitudinal (braking) forces.
2
Evaluate the risk to commercial vehicle stability based on CDL safety guidelines.
Wheel lockup occurs, eliminating directional steering control and increasing the risk of skidding, jackknifing, or a rollover.
A locked wheel cannot provide the directional guidance needed to navigate around an obstruction.
3
Determine the proper sequence for emergency evasive steering.
Turn the wheel smoothly without braking, counter-steer to recover the lane, and apply controlled braking only after the vehicle is traveling straight.
Steering is significantly faster than stopping, and keeping off the brake preserves the tire traction needed for the turn.

Key Concept

Evasive Steering Dynamics and Braking Separation
Estimated Time:1m 0s
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Topics

Evasive Steering and Avoiding Collisions

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