The streets and other public grounds of the City within 200 feet of every hospital in the City shall constitute and be known as "hospital quiet zones". The limits of such hospital quiet zones shall be indicated by appropriate signs placed by the Police Department of the City. Such signs shall be placed at a distance of 200 feet from every hospital in such conspicuous places that they may be seen by the public.
No driver of any vehicle, no rider or driver of any animal, no pedestrian or other person, upon such streets or public grounds of the City within such quiet zones, shall make or cause to be made any unnecessary noise. Cutouts and exhausts upon motor vehicles shall be silenced; horns, klaxons or gongs shall not be unnecessarily sounded and all vehicles and animals shall move within such zones with such speed as will create as little noise as possible. However, the provisions of this section shall not apply to authorized emergency vehicles. (1947 Code §19.13)