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Difficulty: MediumHours of Service (HOS) Regulations

Following a mandatory 1010-hour rest period, a regional motor carrier operator logs on for duty at 05:0005:00. The operator conducts a 3030-minute vehicle pre-trip inspection, drives for 4.54.5 hours, remains on duty for 2.02.0 hours supervising cargo unloading at a freight terminal, and then takes a 1.01.0-hour off-duty meal break. The operator is ready to resume driving at 13:0013:00. Assuming standard property-carrying Hours of Service rules apply without adverse driving condition extensions or sleeper-berth splits, what is the maximum number of additional hours the operator can legally drive during this shift?

Answer: 6 hours

Answer

6 hours (or 6.0 hours)
The driver began duty at 05:00, establishing a fixed 14-hour window that closes at 19:00. By 13:00, 8 hours of the window have elapsed (0.5 hour pre-trip inspection + 4.5 hours driving + 2.0 hours unloading + 1.0 hour off duty). Although the driver has 6.5 hours of driving time remaining under the 11-hour rule (11.0 - 4.5 = 6.5), only 6.0 hours remain before the 14-hour duty window expires at 19:00. Because off-duty time does not extend the 14-hour window, the driver is restricted to a maximum of 6.0 additional driving hours.

Step-by-Step Solution

1
Calculate the end time of the 14-hour consecutive driving window.
The 14-hour window began at 05:00 and ends strictly at 19:00.
Under FMCSR Section 395.3(a)(2), a property-carrying driver may not drive after the 14th consecutive hour after coming on duty following 10 consecutive hours off duty. Off-duty breaks do not extend this window.
2
Calculate elapsed shift time and remaining time within the 14-hour window at 13:00.
Elapsed time is 8.0 hours (0.5 + 4.5 + 2.0 + 1.0); remaining window time is 6.0 hours (14.0 - 8.0).
All duty statuses (on-duty driving, on-duty not driving, and off-duty) count toward the continuous 14-hour window.
3
Calculate remaining driving hours under the 11-hour maximum driving limit.
11.0 - 4.5 = 6.5 hours of driving remaining.
Under FMCSR Section 395.3(a)(1), drivers may drive a maximum of 11 hours during the shift.
4
Evaluate the 30-minute rest break rule and identify the binding limit.
The 1.0-hour off-duty meal break between 12:00 and 13:00 reset the 8-hour driving clock; the binding limit is the 14-hour window allowing 6.0 hours.
A driver cannot drive past the expiration of either rule. Since 6.0 hours of window time is less than the 6.5 hours of remaining driving time, driving must cease when the 14-hour window closes at 19:00.

Key Concept

Application of the 14-hour consecutive duty window as a hard limit versus the 11-hour cumulative driving limit under FMCSR Hours of Service regulations.
Estimated Time:1m 30s
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Topics

Hours of Service (HOS) Regulations

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