(a) The sounding of any horn or signaling device on any automobile, motorcycle, streetcar or other vehicle on any street or public place of the City, except as a danger warning; the creation by means of any such signaling device of any unreasonable loud or harsh sound; and the sounding of any such device for an unnecessary and unreasonable period of time is unlawful.

(b) The use of any signaling device, except one operated by hand or electricity; the use of any horn, whistle or other device operated by engine exhaust; and the use of any such signaling device when traffic is for any reason held up is unlawful. (Code 1981 § 27-4. Code 1995 § 54-149.)