31-5-706. Lamps and other equipment. (a) Every bicycle when in use at nighttime shall be equipped with a lamp on the front which shall emit a white light visible from a distance of at least five hundred (500) feet to the front and with a red reflector on the rear of a type approved by the highway department which shall be visible from six hundred (600) feet to the rear when directly in front of lawful lower beams of head lamps on a motor vehicle. A lamp emitting a red light visible from a distance of five hundred (500) feet to the rear may be used in addition to the red reflector. (b) A bicycle shall not be equipped with nor shall any person use upon a bicycle any siren or whistle. (c) Every bicycle shall be equipped with a brake which will enable the operator to stop the bicycle within twenty-five (25) feet from a speed of ten (10) miles per hour on dry, level, clean pavement.
Wyoming Legal Code