Under what condition is a school bus driver exempt from keeping a log book?

A school bus driver is exempt from keeping a log book when operating within a 100 air-mile radius of their work location due to regulations that facilitate operational efficiency while ensuring safety. This exemption acknowledges that short-distance travel typically does not lead to extended periods of driving that could contribute to fatigue, which is a primary concern in commercial driving.

When a driver stays within this limit, the expectation is that they can return to their terminal or work location more frequently, which helps manage their rest periods effectively. Consequently, the need for detailed log book entries is reduced, as the operational patterns of such trips do not typically necessitate the same level of tracking as longer hauls where fatigue and time management are more critical.

Options that pertain to returning to the garage or taking lunch breaks do not address the parameters of driving distance, while noting that the bus not being in use also does not directly relate to the operational criteria for driving under the specified distance. Thus, the focus on the 100 air-mile radius provides the most relevant condition for the exemption.