Examkin

Question

Difficulty: EasySpeed and Road Conditions

Match each roadway condition with its required commercial driving speed adjustment rule.

  • Wet pavementReduce speed by approximately one-third
  • Packed snowReduce speed by one-half or more
  • Icy road surfaceReduce speed to a crawl

Answer

Wet pavement pairs with reducing speed by approximately one-third; Packed snow pairs with reducing speed by one-half or more; Icy road surface pairs with reducing speed to a crawl.
Under standard CDL safety rules, drivers must adjust speed according to road conditions: reduce by about one-third on wet pavement, by one-half or more on packed snow, and down to a crawl on ice.

Step-by-Step Solution

1
Determine the CDL guideline for wet pavement.
Wet pavement corresponds to a one-third speed reduction.
Water increases stopping distance and reduces contact patch friction.
2
Determine the CDL guideline for packed snow.
Packed snow corresponds to a reduction of one-half or more.
Snow significantly diminishes tire adhesion.
3
Determine the CDL guideline for icy road conditions.
Icy surfaces require slowing down to a crawl.
Ice offers minimal grip, making any standard operating speed unsafe.

Key Concept

CDL speed reduction standards for varied adverse surface conditions
Rate this question

Topics

Speed and Road Conditions

More questions from this topic