Every towed vehicle shall be coupled by means of a safety chain, cable, or equivalent device, in addition to the regular trailer hitch or coupling. The safety chain or cable shall be securely connected with the chassis of the towing vehicle, the towed vehicle, and the drawbar. The safety chain or cable shall be of sufficient material and strength to prevent the 2 vehicles from becoming separated and shall have no more slack than is necessary for proper turning. The safety chain or cable shall be attached to the trailer drawbar so as to prevent it from dropping to the ground, and to assure the towed vehicle follows in the course of the towing vehicle in case the vehicles become separated. The requirement for chains or a cable does not apply to a semitrailer having a connecting device composed of a 5th-wheel and kingpin assembly, nor to a pole trailer.
Whenever the load upon any vehicle extends to the rear 4 feet or more beyond the bed or body of the vehicle there shall be displayed at the extreme rear end of the load, between 1/2 hour after sunset and 1/2 hour before sunrise, 2 red lamps and 2 red reflectors located so as to indicate maximum width and maximum overhang. At all other times, there shall be displayed red flags, not less than 12 inches square, marking the extremities of the load.
Vehicles drawing trailers are prohibited from operating in the left-most general purpose lane on highways with more than 3 lanes traveling the same direction.