In such a combination, the vehicles shall be connected to each other by a ball hitch, a pintle hitch, or a pin hitch

The maximum length of the vehicles in this combination may not exceed one hundred feet and neither implement may exceed forty - five feet in length. The combination may not be operated on the interstate highway system. The combination may travel on other public highways only during the hours of sunrise to sunset, may not travel in excess of twenty - five miles per hour, and the rearmost implement shall display red flags on the extremities. A violation of this section is a Class 2 misdemeanor. Source: SL 1998, ch 192 , § 1.