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Difficulty: HardHours of Service (HOS) Regulations

An interstate freight driver starts on-duty time at 06:00 and performs 2.5 hours of vehicle inspections and cargo loading. The driver then drives continuously from 08:30 until 13:30 (5 hours). Between 13:30 and 15:30, the driver spends 1.5 hours assisting with unloading at a customer facility and takes a qualifying 30-minute off-duty meal break. At 15:30, the driver prepares to drive the return leg. Assuming standard property-carrying rules with no adverse conditions or sleeper-berth splits, what is the maximum number of additional driving hours this driver can legally log during this work shift?

  1. A
    6.0 hours
  2. 4.5 hoursAnswer
  3. C
    3.5 hours
  4. D
    5.0 hours

Answer

4.5 hours, because the driver is restricted by the expiration of the consecutive 14-hour driving window at 20:00.
A property-carrying driver's 14-hour driving window starts the moment the driver comes on duty (06:00) and runs continuously, closing at 20:00 regardless of off-duty breaks or non-driving duty statuses. At 15:30, only 4.5 hours remain before 20:00. Although the driver has 6.0 hours remaining under the 11-hour driving rule (11−5=611 - 5 = 6), the expiration of the 14-hour window prevents driving more than 4.5 additional hours.

Step-by-Step Solution

1
Determine the end of the consecutive 14-hour driving window
The 14-hour window began at 06:00 and expires strictly at 20:00 (06:00+14 hours=20:0006:00 + 14\text{ hours} = 20:00).
Under FMCSR § 395.3(a)(2), a property-carrying driver may not drive after the 14th consecutive hour after coming on duty.
2
Calculate remaining driving time under the cumulative 11-hour driving limit
The driver has logged 5.0 hours of driving, leaving 11.0−5.0=6.011.0 - 5.0 = 6.0 hours of allowable driving time.
Under FMCSR § 395.3(a)(3), drivers are limited to a maximum of 11 hours of driving per shift following 10 consecutive hours off duty.
3
Compare the remaining 14-hour window time against the remaining 11-hour driving limit from current time
From 15:30 to the 20:00 window cutoff is 4.5 hours (4 hours and 30 minutes4\text{ hours and } 30\text{ minutes}). Since 4.5 hours<6.0 hours4.5\text{ hours} < 6.0\text{ hours}, the 14-hour window is the limiting constraint.
Off-duty periods and on-duty non-driving activities do not pause or extend the consecutive 14-hour window in standard property-carrying operations.

Key Concept

Interaction between the 11-Hour Driving Limit and the 14-Hour Consecutive Duty Window
Estimated Time:2m 0s
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Topics

Hours of Service (HOS) Regulations

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