Wyoming Statutes Title 31. Motor Vehicles § 31-5-929. School buses

(a) Every school bus shall, in addition to any other equipment and distinctive markings required by this act, be equipped with signal lamps mounted as high and as widely spaced laterally as practicable, which shall display to the front two (2) alternately flashing red lights located at the same level and to the rear two (2) alternately flashing red lights located at the same level, and these lights shall be visible at five hundred (500) feet in normal sunlight.

(b) Any school bus shall, in addition to the lights required by subsection (a) of this section, be equipped with yellow signal lamps mounted near each of the four (4) red lamps and at the same level but closer to the vertical centerline of the bus, which shall display two (2) alternately flashing yellow lights to the front and two (2) alternately flashing yellow lights to the rear, and these lights shall be visible at five hundred (500) feet in normal sunlight.  These lights shall be displayed by the school bus at least one hundred (100) feet, but not more than five hundred (500) feet, before every stop at which the alternately flashing red lights required by subsection (a) of this section will be actuated.

(c) The superintendent is authorized to adopt standards and specifications applicable to lighting equipment on and special warning devices to be carried by school buses consistent with this act, but supplemental thereto.  The standards and specifications shall correlate with and, so far as possible, conform to the specifications then current as approved by the Society of Automotive Engineers.