This evening on 465 during the daily southside slowdown, a tractor with a tri axel flat bed came up beside me. On each wheel of the trailer on the right side was a yellow metal strap affixed to one of the lug nuts that was bent to follow the contour of the rim and maybe 1/4 of the way up the sidewall of the tire. This strap way maybe 1 1/2" wide and painted yellow. I have no clue what their purpose is. If it makes any difference, the trailer had supper single tires.