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Difficulty: MediumSpace for Turns

An operator of a 48-foot semi-trailer approaches an intersection to make a right turn onto a narrow cross street. To prevent passenger vehicles from attempting to pass on the right side while accounting for trailer off-tracking, what is the proper procedure to execute this turn?

  1. A
    Steer into the adjacent left lane before entering the intersection to create a wider initial turning arc.
  2. Maintain the rear of the trailer close to the right curb line when beginning the turn, and swing wide into the cross street as the vehicle completes the maneuver.Answer
  3. C
    Accelerate briskly into the turn to clear the corner before following traffic has an opportunity to close the gap.
  4. D
    Move into opposing traffic lanes prior to reaching the intersection to avoid having the trailer tires mount the sidewalk curb.

Answer

Maintain the rear of the trailer close to the right curb line when beginning the turn, and swing wide into the cross street as the vehicle completes the maneuver.
When executing a right turn in a large vehicle, the driver should keep the rear of the vehicle close to the curb when entering the intersection to prevent other vehicles from passing on the right. If extra clearance is required due to off-tracking, the driver should swing wide as the vehicle completes the turn into the cross street (a button-hook turn), rather than swinging wide to the left before starting the turn (a jug-handle turn).

Step-by-Step Solution

1
Identify the primary collision hazard during a right turn in a combination vehicle.
Recognize that other drivers frequently attempt to pass on the right if a gap opens up between the trailer and the curb.
Off-tracking causes the rear wheels to follow a tighter path than the front wheels, creating an instinct for untrained drivers to swing wide early.
2
Select the correct spatial management technique (button-hook turn).
Keep the vehicle positioned near the right curb line upon entering the intersection and only turn wide into the cross street as the maneuver finishes.
This positioning denies space to trailing vehicles on the right while safely accommodating the off-tracking path of the rear trailer tandems.

Key Concept

Button-hook right turn execution and off-tracking space management
Estimated Time:1m 0s
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Topics

Space for Turns

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