Public Act 80 changes the maximum length of an RV that had its own motive power, in combination with a trailer, would be 65 feet or, if the RV operator had a group commercial motor vehicle designation on his or her operator's or chauffeur's license, to 75 feet.
Also, under the ACT, a pickup truck with a towing rate equal to or greater than the weight being towed, equipped with a fifth wheel assembly towing attached with a semitrailer designed for recreational living purposes, may tow an additional trailer or semitrailer under certain conditions. The total length of the pickup truck, semitrailer, and additional trailer or semitrailer, and load may not exceed 65 feet. The Act increases the maximum length of this combination to 75 feet.
Learn more: http://legislature.mi.gov/doc.aspx?2011-SB-0035