school bus crossing arm
...that a school bus crossing arm is a safety device intended to protect children from being struck while crossing in front of a school bus?
...that a <b id="mwAhU"><a href="./School_bus_crossing_arm" id="mwAhY" rel="mw:WikiLink" title="School bus crossing arm">school bus crossing arm</a></b> is a safety device intended to protect children from being struck while crossing in front of a <a href="./School_bus" id="mwAhc" rel="mw:WikiLink" title="School bus">school bus</a>?