When a school bus has its red lights activated, which vehicles must stop if the road is separated by a physical barrier?

The correct answer is that only cars on the same side as the school bus must stop when the bus has its red lights activated. This law is designed to protect children getting on and off the bus. When a school bus is stopped and displaying its red lights, it signals that there are children in the vicinity who may be crossing the road. The physical barrier, such as a median or other separation, serves to protect vehicles in the opposite lane from needing to stop, as the children are not in their proximity. Therefore, only the vehicles traveling in the same direction as the bus need to stop to ensure the safety of students boarding or exiting the bus. This regulation reinforces the importance of being alert and following traffic laws when driving near school buses.