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Forest roads, civil engineering facilities that enable traffic to motor vehicles all year round, should be regularly maintained after construction to be able to meet, during their life cycle, all tasks provided by Forest Management Plans. High quality and timely maintenance prolongs the life of forest roads, reduces the costs of motor vehicles and frequency of their repair, makes forest roads trafficable throughout the year and increases the safety of all traffic participants. It is especially important to know the current state of the primary forest road infrastructure when optimizing the maintenance of forest roads.
The research was carried out on 7.031 km of Mac Adam forest roads in mountainous selective forests in the management unit „Belevine“, of the educational and experimental forest site of the Faculty of Forestry in Zagreb – Zalesina. Analysis was made of the development methodology, prescribed content and possibility of application of the current register of primary forest road infrastructure. The methodology for developing a detailed (complete/new) register of primary forest road infrastructure (gathering, processing and interpretation of data) was prepared. The most frequent types and intensity of damage of forest roads of mountainous relief area were defined. A detailed register of primary forest road infrastructure was established with all road facilities. All damages of forest roads were classified, quantified and photodocumented. The possibility and feasibility of application of a detailed register of primary forest road infrastructure in operational forestry was analyzed.
The results of research can be applied in operational forestry, and considering the current and especially future share of maintenance costs in the total costs associated with forest operations, their use is recommended. By the development of high quality, methodologically uniform studies of maintenance of forest roads, based on the new methodology of development of a detailed register of primary forest road infrastructure, the most suitable technology can be selected and the dynamics of maintenance services can be planned, along with the control and rationalization of the related costs.
KEY WORDS: forest roads, maintenance of forest roads, register of primary forest traffic infrastructure, type of damage, degree of damage, study of forest roads maintenance