OAR 734-071-0040: 56-Foot Semitrailers in Combinations

In a truck-tractor and semitrailer combination, the semitrailer may be up to 56 feet in length if the distance between the kingpin setting and the centerline of the rearmost axle of the semitrailer does not exceed 46 feet and the gross combination weight does not exceed 80,000 pounds and the semitrailer is used exclusively or primarily to transport vehicles in connection with motor sports competition events. These combinations shall not be stinger-steered and will be limited to the Oregon Interstate Highway System and up to one road-mile reasonable access from the Interstate.