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Zorluk: KolaySpace Ahead and Following Distance

While driving a 40-foot40\text{-foot} single-unit truck at a steady speed of 35 mph35\text{ mph} on a dry roadway, what is the minimum safe following distance you must maintain behind the vehicle ahead?

  1. A
    2 seconds2\text{ seconds}
  2. B
    5 seconds5\text{ seconds}
  3. 4 seconds4\text{ seconds}Cevap
  4. D
    8 seconds8\text{ seconds}

Cevap

4 seconds4\text{ seconds}
Under standard commercial driving rules, a driver must maintain at least 1 second of following distance for every 10 feet of vehicle length when driving under 40 mph40\text{ mph}. For a 40-foot40\text{-foot} single-unit truck traveling at 35 mph35\text{ mph}, the required following distance is 40÷10=4 seconds40 \div 10 = 4\text{ seconds}.

Adım Adım Çözüm

1
Calculate base following distance from vehicle length
A 40-foot40\text{-foot} truck requires 4 seconds4\text{ seconds} (40÷10=440 \div 10 = 4).
Commercial vehicle safety standards require 1 second of following distance for every 10 feet of vehicle length.
2
Check if an additional second is required for operating speed
Speed is 35 mph35\text{ mph}, so 0 additional seconds0\text{ additional seconds} are needed.
An extra 1 second is only added when operating at speeds of 40 mph or greater.
3
Calculate the total minimum following distance
4 seconds+0 seconds=4 seconds4\text{ seconds} + 0\text{ seconds} = 4\text{ seconds}.
Sum the base vehicle length duration and the speed adjustment.

Anahtar Kavram

Standard commercial vehicle following distance formula based on vehicle length and speed thresholds.
Tahmini Süre:45s
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Konular

Space Ahead and Following Distance

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