Every motor vehicle shall be equipped with a good and sufficient audible signaling device in efficient working condition. The signaling device shall be sounded when necessary to give timely warning to the approach of a vehicle, but the horn or other signaling device shall not be sounded for any other purposes other than an emergency vehicle shall be equipped with a siren or gong signaling device.
(1980 Code, § 20.404) Penalty, see § 70.99