Wyo. Stat. § 31-5-929 (2026)

(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.