I remember when on the back and sides of those small U-Haul trailers there used to be in 3″ high letters, MAX SPEED 45MPH. I guess they must have improved their equipment and their renter education, because today as I cruised down the Interstate at 75 mph, I was passed like I was standing still by a pick-up pulling a U-Haul trailer and it had nary a speed warning on it.