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Zorluk: OrtaWinter Driving

While traveling on a highway during freezing weather, you observe that water spray thrown from the tires of preceding vehicles has ceased, even though the roadway still appears glossy and wet. What dangerous condition does this indicate, and what is the proper action to take?

  1. A
    Traction has improved due to road surface treatment; continue at posted highway speed while maintaining standard dry-pavement following distance.
  2. The road surface has frozen into black ice; smoothly ease off the accelerator to reduce speed without abrupt steering or braking.Cevap
  3. C
    The pavement has developed glaze ice; engage the engine retarder to maximum setting to maintain controlled wheel resistance.
  4. D
    The highway has drained standing water; proceed normally as long as all drive tires meet the steer tire minimum tread depth requirement of 2/32 inch2/32\text{ inch}.

Cevap

The cessation of road spray on a wet-looking surface indicates black ice; the driver must reduce speed gently and avoid sudden steering or braking inputs.
When freezing conditions exist and spray from tires ahead stops while the pavement continues to look shiny or wet, black ice has formed. Black ice is a clear, invisible layer of ice that creates near-zero traction. The proper response is to slow down gradually by easing off the throttle without harsh braking or sharp steering.

Adım Adım Çözüm

1
Analyze the visual cues from the roadway and surrounding traffic.
Identify that the combination of near-freezing temperatures, glossy pavement, and the absence of tire spray signifies the formation of a thin, transparent layer of black ice.
When water freezes on the road surface, liquid spray stops occurring because the moisture is solid ice rather than standing liquid.
2
Determine the appropriate vehicle control actions on black ice.
Select gradual deceleration by easing off the throttle, avoiding abrupt braking, sudden steering maneuvers, and retarder use.
Abrupt control inputs or auxiliary retarder braking can exceed available tire friction and induce an immediate loss of vehicle stability.

Anahtar Kavram

Black Ice Identification and Hazard Response in Winter Conditions
Tahmini Süre:1m 15s
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Konular

Winter Driving

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