On a divided or multiple-lane highway, when is it permissible for pupils to cross the highway to board or exit the bus?

The correct answer indicates that pupils are allowed to cross a divided or multiple-lane highway to board or exit the bus only when traffic is managed by either a traffic officer or an official traffic control signal. This requirement is essential for ensuring the safety of students, as these measures provide clear guidance and control over moving vehicles, reducing the risk of accidents during the crossing.

Traffic officers and control signals are specifically designed to manage the flow of traffic, allowing pedestrians—especially vulnerable populations like schoolchildren—to cross safely. Their presence or the activation of signals helps to ensure that drivers are aware that they need to stop or yield, providing a secure environment for pupils to navigate across the road. Thus, this answer reflects the prioritized safety protocols that are in place for school bus operations.

In contrast, the other options imply conditions that do not adequately account for the complexities and dangers associated with crossing busy highways. Allowing crossing "at any time" disregards the potential dangers students may face, while restricting crossing to "only during daylight hours" does not consider the critical role of traffic control in ensuring safety at all times. Lastly, "when accompanied by an adult" might enhance safety but does not sufficiently address the necessity of traffic control measures, which are fundamental for proper and