school bus
Motorized vehicle for transporting schoolchildren and equipped with specialized safety devices.
crossing arm 
Pivoting rod deployed at each stop so that the schoolchildren stay in the driver’s field of vision while passing in front of the bus.
crossover mirror 
Convex mirror allowing the driver to see the front of the bus.
outside mirror 
Mirror fixed to the outside of the passenger compartment enabling the driver to see behind and along the sides of the vehicle without turning around.
blinking lights 
Flashing red lights at the front and rear of the bus that the driver activates at each stop to signal other vehicles to stop.
blind spot mirror 
Exterior convex mirror providing a wider field of vision than a conventional mirror.