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Zorluk: KolaySpace Ahead and Following Distance

A commercial driver is operating a 60-foot60\text{-foot} articulated transit bus along a suburban roadway at a constant speed of 30 mph30\text{ mph} under ideal driving conditions. According to standard commercial motor vehicle safety guidelines, what is the minimum safe following distance, in seconds, the driver should maintain behind the preceding vehicle?

Cevap: 6 seconds

Cevap

6 seconds
Under standard commercial driving rules, a driver must maintain at least 1 second of following distance for every 10 feet of vehicle length at speeds under 40 mph40\text{ mph}. For a 60-foot60\text{-foot} vehicle traveling at 30 mph30\text{ mph}, the required minimum following distance is exactly 6010=6 seconds\frac{60}{10} = 6\text{ seconds}.

Adım Adım Çözüm

1
Calculate base time allowance for vehicle length
6 seconds
Commercial vehicle following distance standards require at least 1 second for each 10 feet of vehicle length: 60/10=660 / 10 = 6.
2
Apply speed-based modifier
0 additional seconds
The vehicle is operating at 30 mph30\text{ mph}, which is below 40 mph40\text{ mph}; therefore, the additional 1-second high-speed buffer does not apply.
3
Sum all components for final following distance
6 seconds
Total following interval equals base interval (6 s6\text{ s}) plus speed modifier (0 s0\text{ s}).

Anahtar Kavram

CDL Following Distance Formula
Tahmini Süre:45s
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Konular

Space Ahead and Following Distance

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