An interstate truck driver comes on duty at 06:00 following 10 consecutive hours of rest. … — Commercial Driver's License (CDL) General Knowledge Exam

An interstate truck driver comes on duty at 06:00 following 10 consecutive hours of rest. During the morning, the driver spends $2\text{ hours}$ loading freight (on-duty, not driving) and then drives for $5\text{ hours}$ . At 13:00, the driver takes a mandatory $30\text{-minute}$ off-duty meal break, resuming duty at 13:30. Assuming no further non-driving duties or delays, what is the maximum number of additional driving hours the driver is permitted to log before reaching the regulatory limit for the shift?

A
$6.5\text{ hours}$
$6\text{ hours}$ Answer
C
$4\text{ hours}$
D
$9\text{ hours}$

Answer

6\text{ hours}

Under Hours of Service (HOS) regulations, a property-carrying commercial driver may drive up to

11\text{ hours}

within a

14\text{-hour}

consecutive window after completing

10\text{ consecutive hours}

off duty. The driver already completed

5\text{ hours}

of driving, leaving

11 - 5 = 6\text{ hours}

of driving available. Resuming driving at 13:30 after the required

30\text{-minute}

break,

6\text{ hours}

of driving completes at 19:30, which falls safely before the

14\text{-hour}

window closes at 20:00.

Step-by-Step Solution

Calculate remaining driving hours under the 11-hour driving rule.

The driver has

6\text{ hours}

of driving capacity remaining (

11\text{ hours} - 5\text{ hours} = 6\text{ hours}

Property-carrying commercial drivers are limited to a maximum of 11 hours of total driving time during a shift.

Determine the expiration time of the 14-hour consecutive duty window.

The 14-hour window opened at 06:00 and expires at 20:00 (8:00 PM).

Drivers may not drive after the end of the 14th consecutive hour following 10 consecutive hours off duty.

Verify that the remaining driving time fits within the 14-hour duty window.

Resuming driving at 13:30 for

6\text{ hours}

finishes at 19:30, which is before the 20:00 window closure.

Both the 11-hour driving cap and the 14-hour duty window constraint must be satisfied simultaneously.

Key Concept

Hours of Service (HOS) 11-Hour Driving Limit and 14-Hour Duty Window

Estimated Time:1m 15s

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