311.04  ZONES OF QUIET.
   (a)   The Traffic Commission may designate zones of quiet on any highway within 250 feet of any hospital or school, and when any such zone is so designated by official traffic signs, it shall be unlawful to blow a horn or a whistle, or to make or cause any outcry or any avoidable noise or clamor likely to disturb persons within such zone.  (1979 Code 72.51)
   (b)   Whoever violates any provision of this section is guilty of a minor misdemeanor on a first offense; on a second offense within one year after the first offense, the person is guilty of a misdemeanor of the fourth degree; on each subsequent offense within one year after the first offense, the person is guilty of a misdemeanor of the third degree.