Examkin

Soru

Zorluk: OrtaSpace Ahead and Following Distance

A tractor-semitrailer combination measures 55 feet55\text{ feet} in total bumper-to-bumper length and maintains a steady cruising speed of 50 mph50\text{ mph} on a dry, open interstate highway under clear daytime conditions. According to commercial vehicle space management rules, what is the minimum required following distance, in seconds, that the driver must maintain behind the lead vehicle?

Cevap: 6.5 seconds

Cevap

6.5 seconds
Under standard commercial driving regulations, the required minimum following distance is 1 second per 10 feet of vehicle length at speeds below 40 mph, plus an additional 1 second when traveling at 40 mph or higher. For a 55-foot vehicle, the base time is 5.5 seconds (55 / 10). Because the truck is traveling at 50 mph, 1 additional second is required, making the total minimum following distance 6.5 seconds.

Adım Adım Çözüm

1
Calculate base following distance from total vehicle length
5.5 seconds
Commercial driving safety standards require at least 1 second for every 10 feet of vehicle length (55 feet / 10 = 5.5 seconds).
2
Evaluate operating speed to determine if a speed adjustment is required
Add 1.0 second
When operating at speeds of 40 mph or greater, drivers must add 1 additional second to account for increased stopping distance.
3
Sum the base duration and the speed modifier
6.5 seconds
Combining the base length requirement (5.5 seconds) and the speed adjustment (1.0 second) gives 6.5 seconds.

Anahtar Kavram

Calculating required space ahead using the 1 second per 10 feet rule plus the 1-second adjustment for speeds at or above 40 mph.
Tahmini Süre:1m 0s
Bu soruyu puanla

Konular

Space Ahead and Following Distance

Bu konudan daha fazla soru