What is the purpose of the crossing control arm on a school bus?
a.To block traffic from passing the bus
b.To keep students away from the front of the bus as they exit
c.To signal other drivers to stop
d.To help students climb onto the bus
Explanation
The crossing control arm, or crossing gate, extends outward from the front of the bus when the door opens. It forces students to walk far enough away from the front of the bus to be visible to the driver.