Which of the following statements is true about the operation of a school bus?

The correct statement is that a school bus cannot tow another vehicle. This regulation is in place to ensure the safety and stability of the bus while transporting students. Towing can drastically affect the handling characteristics of the vehicle, especially under the conditions required for safe operation in a school environment, where sudden stops and turns may be frequent due to the presence of children. A school bus is designed specifically for transporting students safely, and towing could compromise that design, increasing the risk of accidents.

In contrast, the other options present specific scenarios that do not align with regulations governing school bus operation. For example, while bicycles or trailers may sometimes be transported by other vehicles, school buses are not permitted to carry them due to space constraints and safety considerations. Furthermore, bus drivers are required to stop at certain designated points, particularly when students are boarding or disembarking, but they are not mandated to stop at every intersection unless specific traffic signs or conditions apply. Lastly, buses are subject to speed limits just like any other vehicle on the road; they do not receive any exemptions from these regulations, ensuring that they operate within legal speed guidelines for enhanced safety.