For the purposes of this chapter, the following words and phrases shall have the meanings respectively ascribed to them by this section:
Any vehicle which carries, while in motion or standing, for display to the view of the public upon or along public highways, any signs, or any statuary or other advertising objects, symbols or matter; and any vehicle modeled to resemble a locomotive, railroad car, covered-wagon or stagecoach, or which is contrived to buckle, to simulate explosion, or fall apart or to function otherwise in strange or startling fashion, or which is especially fitted up to present a grotesque, arresting or unusual appearance, for advertising purposes or for the purpose of attracting the attention of the public upon or along the public highways.
The putting of business notices, signs or emblems upon ordinary business vehicles does not make such vehicles advertising vehicles so long as such vehicles are actually engaged in the usual business or regular work of the owner and are not used merely or mainly for advertising or for attracting the attention of the public.
Any vehicle which carries or is equipped with any instrument or device for the production or reproduction of music, spoken words or other sounds, or any loudspeaker or other sound amplifying device designed to enlarge the volume of sound produced by any instrument or by the human voice, which instrument or device is used, or intended to be used, for the purpose of advertising or calling attention to any article, thing or event, or for the purpose of addressing the public or of attracting the attention of the public, along or upon the public highways along which such vehicle travels.
Sound vehicle does not include a vehicle equipped with a siren or horn designed and used for the purpose of warning traffic because of such equipment or use. The incidental sounding of a horn or bell in connection with the ordinary use and operation of a tradesman's, peddler's, huckster's or hawker's cart or vehicle does not bring such cart or vehicle within the definition of "sound vehicle."
(Prior code § 37-1)