It's almost impossible tg enforce a
regulation against horn blowing in any reasonable way. A friend suggested an effective horn tax by putting a limit on the number of honks. Once you go over, you gotta pay to have it turned back on again at your annual car inspection or similar.
In 1972, the city’s noise code was overhauled. Horn-honking “when there is no imminent danger” became a criminal offense. The Sanitation Department redesigned its garbage trucks to operate at a noise level no louder than a vacuum cleaner. Car owners had 10 minutes to shut off a wailing alarm.