On a highway with five or more lanes, who must stop for a school bus?

The correct response is that only vehicles behind the school bus must stop when the bus has its flashing lights activated and its stop arm extended. This rule is in place to ensure the safety of children boarding or exiting the bus.

When a school bus is stopped with its lights flashing, it is indicating that children may be present in the roadway. Vehicles traveling in the opposite direction do not have to stop if there are five or more lanes on the highway, as the law allows them to proceed with caution. This is designed to balance the need for safety while maintaining the flow of traffic on wider roads.

Options that refer to vehicles in both directions or those in a shared center turn lane are not correct because those vehicles are generally given the allowance to continue moving unless they are directly behind the bus. This helps to avoid unnecessary congestion while still prioritizing the safety of students.