(a) The driver of a motor vehicle shall, when reasonably necessary to insure safe operation, give audible warning with his horn but shall not otherwise use such horn at any time.
(b) The sounding of any horn or signal device on any automobile, motorcycle, bus or other vehicle while stationary, except as a danger signal when an approaching vehicle is apparently out of control, or, if in motion, only as a danger signal after or as brakes are being applied and deceleration of the vehicle is intended, or the creation by means of any such signal device of any unreasonably loud or harsh sound or the sounding of any such device for an unnecessary and unreasonable period of time, is hereby prohibited.
(Added Coun. J. 7-12-90, p. 18634)