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Zorluk: OrtaHours of Service (HOS) Regulations

A property-carrying commercial driver begins a shift at 07:00 following 10 consecutive hours off duty. From 07:00 to 09:00, the driver performs pre-trip inspections and oversees cargo loading. From 09:00 to 14:00, the driver drives on the interstate. From 14:00 to 16:00, the driver takes an off-duty meal and rest break at a travel plaza. Assuming standard rules without split sleeper-berth provisions, how many additional hours of driving can this driver legally perform after 16:00?

  1. A
    6 hours
  2. 5 hoursCevap
  3. C
    7 hours
  4. D
    4 hours

Cevap

5 hours
The driver started their duty period at 07:00, meaning their 14-hour consecutive driving window ends at 21:00. At 16:00, exactly 5 hours remain until the 21:00 cutoff. Even though the driver has only driven 5 of their 11 allowable hours (leaving 6 theoretical driving hours), they cannot legally drive beyond the 14-hour window limit. Thus, they are capped at 5 hours of driving.

Adım Adım Çözüm

1
Calculate the expiration time of the 14-hour driving window.
The 14-hour consecutive window begins at 07:00 and ends strictly at 21:00.
Under Federal Motor Carrier Safety Regulations (FMCSR), property-carrying drivers may not drive after the 14th consecutive hour coming on duty, and routine off-duty breaks do not pause this clock.
2
Determine remaining driving hours under the 11-hour maximum driving rule.
11 hours−5 hours driven=6 hours remaining11\text{ hours} - 5\text{ hours driven} = 6\text{ hours remaining}.
Drivers are permitted a maximum of 11 hours of driving time within the duty window.
3
Determine remaining clock time within the 14-hour window from the current time (16:00).
21:00−16:00=5 hours remaining21:00 - 16:00 = 5\text{ hours remaining}.
The driver cannot drive past 21:00.
4
Compare the two limiting constraints to find the maximum allowable driving hours.
min⁡(6 hours,5 hours)=5 hours\min(6\text{ hours}, 5\text{ hours}) = 5\text{ hours}.
The driver is limited by the earlier constraint, which is the closure of the 14-hour window at 21:00.

Anahtar Kavram

14-Hour Consecutive Duty Window vs. 11-Hour Maximum Driving Limit
Tahmini Süre:1m 15s
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Hours of Service (HOS) Regulations

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