Road maintenance is extremely important when it comes to road safety. Highways, as roads of the largest category, are equipped with more equipment, and the systems are significantly more demanding than on other public roads. The section Prgomet - Bisko is 38.9 km long (one way), and on it there are buildings such as tunnels, viaducts, junctions, green bridge, as well as other buildings and equipment. All these buildings, as well as the rest of the section, include various systems that are responsible for the smooth flow of traffic on and through them. Many systems have advanced or intelligent technology and thus can have a preventive effect on the prevention of traffic accidents. The maintenance services located in the Technical Maintenance Unit (TMU) Split carry out work to preserve the state of correctness, thereby ensuring the functionality of traffic on the section. Employees of TMU Split maintain the roadway, dirt surfaces, traffic signals and signs, electrical systems, drainage system, then supervise the section and perform winter service tasks in order to provide the highest quality and safest service to users of the highway on the Prgomet - Bisko section.