You're the driver of a bus displaying reflective yellow school-bus signs. When are you allowed to use hazard warning lights? You're the driver of a bus displaying reflective yellow school-bus signs. When are you allowed to use hazard warning lights?

• Possible answers:

   
• A. When parked to take a rest period
• B. When children are boarding the bus
• C. When slowing down to approach a bus stop
• D. When slowing down to find a parking space