1. (a) A school bus must, in addition to other equipment and distinctive markings required by this chapter, be equipped with signal lights mounted as high and as widely spaced laterally as practicable, which must display to the front two alternately flashing red lights located at the same level and to the rear two alternately flashing red lights located at the same level. The lights must be visible at 500 feet in normal sunlight. The alternately flashing red lights must be illuminated by the driver of the school bus when, but only when, the bus is stopped for the purpose of receiving or discharging school children, except that the lights may not be illuminated in

   1. (1) a designated school bus loading or unloading area where the bus is entirely off the roadway and a child being received into or discharged from the bus is not required to cross the roadway; or
   2. (2) an intersection or other place where traffic is controlled by a traffic-control signal or by a police officer.
2. (b) A school bus must be equipped with yellow signal lights mounted near each of the four red lights required in (a) of this section and at the same level but closer to the vertical centerline of the bus. These lights must display two alternately flashing yellow lights visible to the front and rear of the bus for a distance of at least 500 feet in normal sunlight. The yellow flashing lights must be illuminated by the school bus driver at least 100 feet, but not more than 500 feet, before every stop at which the alternately flashing red lights are illuminated, at which time the alternately flashing yellow lights authorized by this section must be turned off.
3. (c) Every school bus must have indicator lights readily visible to the driver of the bus, which automatically indicate to the driver of the bus when any of the alternately flashing lights authorized by this section are illuminated.

(Eff. 6/28/79, Register 70)