(1) Any stop or turn signal when required herein shall be given either by means of the hand and arm or by signal lamps, except as otherwise provided in subsection (2).
(2) Any motor vehicle in use on a highway shall be equipped with, and required signal shall be given by, signal lamps when the distance from the center of the top of the steering post to the left outside limit of the body, cab or load of such motor vehicle exceeds 24 inches, or when the distance from the center of the top of the steering post to the rear limit of the body or load thereof exceeds 14 feet. The latter measurement shall apply to any single vehicle and also to any combination of vehicles.
(3) A violation of this section is a noncriminal traffic infraction, punishable pursuant to chapter 318 as either a moving violation for infractions of subsection (1) or as a nonmoving violation for infractions of subsection (2).
