A back-to-school reminder for this #ThrowbackThursday
Around the 1950s, states began using a bright flashing red stop sign to warn cars to come to a complete stop so children can exit the bus safely. Make sure not to proceed until a school bus resumes motion, you are signaled by the school bus driver to proceed, or the flashing red lights and the stop sign on the control are no longer activated.
Original source can be found here.
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