Which of the following is NOT a reason for a school bus driver to be exempt from a log book?

A school bus driver is generally exempt from keeping a log book under certain conditions laid out by regulations. One of these conditions is if the driver operates within a 100 air mile radius, as they are typically not required to maintain a log book since their routes are often short and local.

In the context of the question, operating outside of a 100 air mile radius does not fall within the exemptions. If a driver operates beyond this boundary, they would generally be subject to more stringent logging requirements because longer distances can lead to more complex driving schedules and increased hours of service regulations.

The other situations presented, such as returning to the work location and being released within 16 hours or taking a break of at least 8 hours, clearly outline circumstances where an exemption may apply. Additionally, working more than 16 consecutive hours would typically require the driver to log their hours to ensure safety guidelines are followed, as it indicates extended operation that may lead to fatigue. Thus, operating outside of the defined air mile radius is indeed the condition that does not provide an exemption from maintaining a log book.