Examkin

Soru

Zorluk: Çok zorSpace for Turns

When a commercial combination vehicle executes a sharp right turn, the geometric phenomenon known as 'off-tracking' dictates that the rear wheels follow a shorter path than the front wheels. When applying this principle to an urban intersection with a tight turning radius and limited clearance, which execution strategy demonstrates the correct synthesis of off-tracking physics and spatial hazard management?

  1. A
    Executing a deliberate leftward steering sweep immediately before entering the intersection to widen the tractor's entry angle, which reduces the off-tracking severity and guarantees clearance for the trailer's rear axles.
  2. B
    Pre-positioning the vehicle by straddling the lane-divider or occupying the adjacent left lane during the approach, establishing a wider turning arc that keeps the trailer's off-tracking path entirely within the designated lanes.
  3. Maintaining a tight approach along the right curb to prevent vehicles from passing on the right, and delaying the right steering input by pulling straight forward deep into the intersection to safely pivot the trailer around the tight curb radius.Cevap
  4. D
    Initiating a gradual right steering input well before the tractor reaches the intersection boundary, using the entire surface area of the intersection to establish a shallow swept path that prevents curb strikes.

Cevap

Maintaining a tight approach along the right curb to prevent vehicles from passing on the right, and delaying the right steering input by pulling straight forward deep into the intersection to safely pivot the trailer around the tight curb radius.
The correct strategy strictly adheres to the 'button-hook' method. By keeping the trailer close to the right curb during the approach, the driver actively denies following traffic the opportunity to pass on the right. Pulling straight and deep into the intersection before applying a sharp right steering input artificially advances the vehicle's pivot point, ensuring the rear wheels clear the tight curb radius despite the aggressive off-tracking.

Adım Adım Çözüm

1
Analyze the physical constraints of a commercial vehicle turning right.
Recognize that 'off-tracking' causes the rear trailer wheels to take a shorter, tighter path than the steer tires, creating a risk of striking the inside curb.
Understanding the vehicle's turning geometry is essential for planning the maneuver.
2
Evaluate the hazards associated with altering the turning approach to compensate for off-tracking.
Determine that swinging left before a right turn (jug-handle) or straddling lanes opens a dangerous blind-spot gap on the right side.
Other drivers may misinterpret a leftward swing as a left turn and attempt to pass on the right, leading to a collision.
3
Synthesize physics management with hazard prevention to identify the correct maneuver.
Identify the 'button-hook' maneuver as the only compliant and safe method.
By pulling deep into the intersection before turning, the pivot point is advanced, allowing the trailer to clear the curb while keeping the right side closed to following traffic.

Anahtar Kavram

Button-Hook Turning Technique and Off-Tracking Space Management
Bu soruyu puanla

Konular

Space for Turns

Bu konudan daha fazla soru