What is the purpose of the school bus stop sign or stop arm?

• A. To alert drivers to stop when pupils are loading or unloading.
• B. For decoration.
• C. To indicate school bus is parked.
• D. For use only at railroad crossings.

Answer: (A)

The stop sign on a school bus is a critical safety signal. When a bus stops to pick up or drop off pupils, the stop arm extends and the red lights flash to alert drivers that they must stop. This creates a safe space for children to board or exit the bus and cross the street if needed, reducing the chance of being struck by passing vehicles. It isn’t decorative, it doesn’t indicate the bus is merely parked, and it isn’t related to railroad crossings. Drivers must stop whenever the stop arm and flashing lights are active, and only resume travel once the arm is withdrawn and the lights are off.