31-5-901(c) equipped with head lamps as required in this act is

31-5-901(c) equipped with head lamps as required in this act is also equipped with any other driving lamps on the front thereof, not more than a total of four (4) of the lamps on the front of a vehicle shall be lighted at any one (1) time when upon a highway. Driving lamps do not include turn or hazard warning signal lamps.

31-5-928. General lighting restrictions; authorized emergency vehicles.

(a) During the times specified in W.S. 31-5-910, any lighted lamp or illuminating device upon a motor vehicle other than head lamps, spot lamps, auxiliary lamps, flashing turn signals, vehicle hazard warning lamps and school bus warning lamps, which projects a beam of light of an intensity greater than three hundred (300) candlepower shall be so directed that no part of the high intensity portion of the beam will strike the level of the roadway on which the vehicle stands at a distance of more than seventy-five (75) feet from the vehicle.

(b) Except as required in W.S. 31-5-929 and this section, no person shall drive or move any vehicle or equipment upon any highway with any lamp or device thereon capable of displaying a red light or blue light visible from directly in front of the center thereof.

(c) Flashing lights are prohibited except as authorized by W.S. 31-5-915, 31-5-921, 31-5-929, 31-5-930, 31-5-931 and this section.

(d) Every authorized emergency vehicle, except law enforcement vehicles and as otherwise specified in this subsection, shall, in addition to any other equipment required by law, be equipped with at least one (1) red lamp visible from five hundred (500) feet in front of the vehicle. Except as otherwise provided in this subsection, every authorized emergency vehicle, may be equipped with one (1) or more blue, white or amber lights. Vehicles used or contracted by a municipality, county or the department to clear snow from public streets, roads or highways may be equipped with one (1) or more lights of a conspicuous color as specified by rules adopted by the department. Privately-owned vehicles used by members of a fire department or emergency service organization in performing or traveling to perform assigned duties in those organizations shall display at least one (1) flashing white, red or amber light, but no blue lights, visible from five hundred (500) feet in front of the vehicle.

(e) A police vehicle primarily engaged in traffic law enforcement shall be marked so as to be readily identifiable.  (f) The following vehicles are authorized to display flashing white and amber lights in addition to those otherwise authorized by law:

(i) Vehicles of civil emergency preparedness agencies;

(ii) Vehicles of municipalities and public service corporations;

(iii) Wreckers;

(iv) Funeral cars;

(v) Vehicles owned by, leased by or registered to a public school district that are not school buses and that are used to transport children to or from school or in connection with school activities.

(g) In addition to these lights otherwise authorized by law, a wrecker is authorized to display flashing red and blue lights at the scene of any emergency.

(h) In addition to those lights otherwise authorized by law, a public utility vehicle may display one (1) or more flashing red lights visible from five hundred (500) feet of the vehicle when providing emergency services. For purposes of this subsection, "public utility" means as defined in W.S. 37-1- 101(a)(vi).

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.

31-5-930. Highway construction and maintenance vehicles.

(a) The superintendent shall adopt specifications and rules governing the use of flashing lights on vehicles engaged in highway construction or maintenance operations.

(b) The driver of a vehicle engaged in highway construction or maintenance shall comply with rules adopted under this section.

31-5-931. Backup and side marker lamps.

(a) Any motor vehicle may be equipped with not more than two (2) backup lamps either separately or in combination with other lamps, but any such backup lamp shall not be lighted when the motor vehicle is in forward motion.

(b) Any vehicle may be equipped with one (1) or more side marker lamps and any side marker lamp may be flashed in conjunction with turn or vehicular hazard warning signals.

(c) Lamps allowed by this section shall comply with the regulations of the superintendent.

31-5-932. Approved sale of lighting devices; mounting.

(a) No person shall have for sale, sell or offer for sale for use upon or as a part of the equipment of a motor vehicle, trailer, semitrailer, motorcycle, autocycle, motor-driven cycle, moped or pole trailer, or use upon the vehicle any head lamp, auxiliary or fog lamp, rear lamp, signal lamp or reflector, which reflector is required by this article, or parts of any of the foregoing which tend to change the original design or performance, unless of a type which has been submitted to the superintendent and approved by him. This section does not apply to equipment in actual use prior to January 1, 1956, or replacement parts therefor.

(b) No person shall have for sale, sell or offer for sale for use upon or as a part of the equipment of a motor vehicle, trailer, semitrailer or pole trailer any lamp or device mentioned in this section which has been approved by the superintendent unless the lamp or device bears thereon the trade-mark or name under which it is approved so as to be legible when installed.

(c) No person shall use upon any motor vehicle, trailer, semitrailer or pole trailer any lamps mentioned in this section unless the lamps are mounted, adjusted and aimed in accordance with instructions of the superintendent.

31-5-933. Repealed by Laws 1985, ch. 138, § 3.

31-5-934. Approved sale of equipment generally.

(a) A person shall not sell or offer for sale any lamp, reflector, hydraulic brake fluid, seat belt, safety glass, emergency disablement warning device, studded tire, motorcycle helmet, eye protection device for motorists, or red rear bicycle reflector unless and until it has been approved by the superintendent.

(b) A person shall not sell or offer for sale any item of equipment for which a standard has been adopted under W.S.