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Question

Difficulty: MediumSpace for Turns

A commercial driver is planning a right turn at an urban intersection where the cross-street has limited clearance. If the turn requires extra room because of trailer off-tracking, which maneuver is correct?

  1. A
    Swing wide to the left into the adjacent traffic lane before beginning the turn to widen the approach arc.
  2. Keep the rear of the vehicle close to the right curb on approach, and swing wide into the cross-street as the turn is completed.Answer
  3. C
    Drive completely past the corner into the oncoming lane of the cross-street before executing a sharp right angle toward the curb.
  4. D
    Accelerate briskly into the turn while hugging the center line to reduce the degree of trailer wheel cheat.

Answer

Keep the rear of the vehicle close to the right curb on approach, and swing wide into the cross-street as the turn is completed.
Executing a proper button-hook turn requires keeping the rear wheels close to the right curb when approaching the intersection to prevent vehicles from passing on the right side. The driver then swings wide into the cross-street as the turn is being completed to provide sufficient clearance for trailer off-tracking.

Step-by-Step Solution

1
Analyze the turning mechanics and risks of right turns with a combination vehicle.
Identify that rear wheels follow a shorter path than front wheels (off-tracking).
Off-tracking causes trailer wheels to cut across curbs, sidewalks, and roadside objects unless compensated for properly.
2
Evaluate the correct setup procedure to block trailing vehicles and manage space.
Determine that a button-hook maneuver is required rather than a jug-handle maneuver.
Keeping the vehicle's right side close to the curb prevents other drivers from passing on the right, and swinging wide only upon entering the cross-street safely accommodates off-tracking.

Key Concept

Proper Right-Turn Space Management (Button-Hook Turn vs. Jug-Handle)
Estimated Time:1m 0s
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Topics

Space for Turns

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