What should not exceed when planning school bus routes?

When planning school bus routes, it is crucial that the transit time does not exceed three hours. Ensuring that the transit time is kept within this limit is important for the comfort and safety of the students. Long transit times can lead to fatigue and discomfort, which can affect children's mood and behavior. Therefore, a well-planned route that adheres to this timeframe can improve the overall experience for students, parents, and bus drivers.

Additionally, keeping transit time within this limit enables better scheduling and coordination with school hours and activities, ensuring that students arrive on time without extended delays. This time frame also allows for better management of routes and ensures buses can adhere to their schedules, which improves efficiency in pick-up and drop-off times.

The other options may pertain to considerations in route planning, but they do not specifically address the critical importance of keeping transit times manageable for the benefit of students.