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Zorluk: KolaySpeed and Road Conditions

Commercial drivers must modify vehicle speed to maintain adequate traction and control on slippery surfaces. Which speed reduction guideline correctly pairs with each adverse road condition?

  • Wet roadwayReduce speed by about 1/31/3
  • Packed snowReduce speed by 1/21/2 or more
  • Icy surfaceSlow down to a crawl

Cevap

Wet roadway pairs with reducing speed by about 1/31/3; packed snow pairs with reducing speed by 1/21/2 or more; and icy surface pairs with slowing down to a crawl.
According to standard commercial driving guidelines: wet pavement requires a speed reduction of about one-third (1/31/3), packed snow requires a reduction of half (1/21/2) or more, and icy conditions require reducing vehicle speed to a crawl.

Adım Adım Çözüm

1
Identify the standard speed reduction rule for wet pavement
Wet roads require reducing speed by roughly one-third (1/31/3)
Water on the pavement increases stopping distance and creates hydroplaning risk.
2
Identify the standard speed reduction rule for packed snow
Packed snow requires cutting speed by at least half (1/21/2 or more)
Snow creates a low-friction layer between the tires and road surface.
3
Identify the standard speed reduction rule for ice
Icy surfaces require slowing to a crawl
Ice provides minimal friction, making normal steering and braking almost impossible at higher speeds.

Anahtar Kavram

CDL Speed Adjustments for Adverse Road Conditions
Tahmini Süre:45s
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Konular

Speed and Road Conditions

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