61-9-415. Slow-moving vehicles. (1) It is unlawful for a person to operate on a state highway, a farm, rural, or county road, or a city street of this state a slow-moving vehicle or equipment, an animal-drawn vehicle, or any other machinery, including all road construction or maintenance machinery, except when engaged in actual construction or maintenance work either guarded by a flag person, as defined in 61-8-102, or clearly visible warning signs, that normally travels or is normally used at a speed of less than 25 miles an hour, unless there is displayed on the rear of the vehicle an emblem as provided in subsection (2). The requirement of the emblem is in addition to any lighting devices required by law.
(2) The emblem required by subsection (1) must be of substantial construction and must be a based-down equilateral triangle of fluorescent yellow-orange film or equivalent quality paint with a base of 14 inches and a height of 12 inches. The triangle must be bordered with reflective red strips having a minimum width of 1 3/4 inches, with the vertices of the overall triangle truncated so that the remaining height is a minimum of 14 inches. The emblem must be mounted on the rear of the vehicle near the horizontal geometric center of the vehicle at a height of 3 to 5 feet above the roadway and must be maintained in a clean, reflective condition.
(3) In addition to the requirements in subsection (2), on a highway that has only two lanes for traffic moving in opposite directions, when an overtaking vehicle being operated in conformity with 61-8-303 does not have a clear lane for passing as required by 61-8-325, the driver of a slower-moving, overtaken vehicle shall, at the first opportunity and when a safe turnout exists, move the overtaken vehicle off the main-traveled portion of the highway until the overtaking vehicle is safely clear of the overtaken vehicle.
(4) On an interstate highway or on any other four-lane highway, a slow-moving vehicle, subject to the requirements of this section, must be driven in the right lane as far to the right as possible, including the shoulder of the highway.