Question

Difficulty: MediumSpace for Turns

When maneuvering a combination commercial motor vehicle through a tight right turn that requires additional turning room, what is the proper sequence of driver actions? Arrange the following steps in the correct chronological order from initial approach to turn completion.

  1. 1Activate the right turn signal well in advance and smoothly reduce vehicle speed on approach.
  2. 2Keep the rear of the vehicle close to the right curb to prevent trailing traffic from passing on the right.
  3. 3Pull straight ahead into the intersection until the cab passes the corner curb line before turning the steering wheel.
  4. 4Swing wide into the cross street while completing the turn so that the off-tracking trailer wheels clear the corner curb.

Answer

The proper chronological order begins with activating the turn signal and slowing down, followed by keeping the rear close to the curb to block right-side passing, then driving straight into the intersection past the corner before turning, and finally swinging wide into the cross street to clear the curb.
A safe button-hook right turn requires the driver to signal early and decelerate, maintain close proximity to the right curb on approach to prevent right-side passing, pull straight into the intersection past the corner, and swing wide into the cross street to account for trailer off-tracking.

Step-by-Step Solution

1
Signal early and reduce speed
Traffic behind and ahead is alerted to the upcoming maneuver, and vehicle speed is controlled.
Drivers must communicate their intent before making lane or speed adjustments.
2
Position the vehicle close to the right curb line
The space to the right side of the combination vehicle remains closed.
Prevents other vehicles from attempting to squeeze past in the blind area on the right side.
3
Drive straight forward into the intersection past the corner curb
The tractor is positioned properly for a button-hook turn without creating a gap on approach.
Swinging wide to the left prior to entering the intersection opens an inviting gap for other motorists to pass on the right.
4
Complete the turn by swinging wide into the destination roadway
The trailer rear wheels follow the off-tracking path safely clear of the sidewalk and curb.
Because combination vehicles off-track, the rear wheels follow a shorter path than the front wheels, requiring extra room in the receiving street.

Key Concept

Button-Hook Right Turn Execution and Off-Tracking Management
Estimated Time:1m 0s
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