Every motor vehicle, when in use on a highway, shall be equipped with a horn or other device capable of making an abrupt sound sufficiently loud to be heard from a distance of at least 200 feet under all ordinary traffic conditions. Every person operating an automobile or bicycle shall sound the horn or sound device whenever necessary as a warning of the approach of the vehicle to pedestrians, or other vehicles, but shall not sound the horn or sound device unnecessarily. A bell may be used on a bicycle.
(KRS 189.080) Penalty, see § 70.99 (A)