It shall be unlawful for any person to place or maintain or
to display upon or in view of any street any unofficial sign, signal
or device which purports to be or is an imitation of or resembles
any official traffic sign or signal or which attempts to direct movement
of traffic or which conceals or hides an official sign or signal.
Every such prohibited sign, signal or device is hereby declared to
be a public nuisance, and the Commissioner of Public Safety is hereby
empowered to remove the same or cause it to be removed without notice.
No motor vehicle shall be operated in the City in such a way
as to emit unnecessary smoke or offensive gases.
No motor vehicle shall be equipped with any bell, gong, horn,
siren or such other sounding or warning device as is used by the police
cars and motorcycles or ambulances, except as allowed under § 375,
Subdivision 26, of the New York State Vehicle and Traffic Law.