Which activities are considered part of on-duty time?

Answer: B — Driving and loading or unloading a CMV

On-duty time encompasses all activities that a commercial driver engages in while not resting. Driving a commercial motor vehicle (CMV) is the most obvious part of on-duty time, as it directly involves the operation of the vehicle. Loading or unloading a CMV also falls under on-duty time because it contributes to the driver's responsibilities and activities related to the operation of the vehicle. Essentially, any task that is necessary to prepare the vehicle for operation or to ensure safe transport is classified as on-duty time. In contrast, resting at a rest area and sleeping in the vehicle are classified as off-duty time, as they focus on providing the driver with necessary rest and do not involve active responsibilities toward the vehicle's operation. Eating while parked can also be considered off-duty time, as it does not require the driver to engage in vehicle operation or loading activities. Thus, activities categorized as on-duty are specifically tied to operational tasks and responsibilities necessary for the job.