In the past forest opening with forest roads was planned only on the basis of forest wood production role. Discovering the importance of other forest roles led to their gradual integration when planning procedures for opening forests.A modern approach to planning the opening of forests requires a simultaneous treatment of all forest roles. Expansion of forest road network is economically founded by the density of the forest roads by which the smallest total cost of skidding and transporting occurs. The economically founded density of forest roads in the researched area, which geographically represents the whole municipality of Črna na Koroškem, by the given conditions amounts to 17.42 m/ha. On this basis there are defined insufficiently opened areas outside the bandwidth of the 574 m, opened by eachroad. When planning the opening of insufficiently opened areas the terrain features and the technical characteristics of the planned forest roads are taken into account. The economical argumentation of the planned forest road construction is based on a bigger reduction of wood skidding costs as is the increase of annual maintenance cost of the forest roads and costs of the permanent loss of the growing area. In the survey simultaneous evaluation of all forest roles is done by the determination of the relative importance of individual forest role. It is based on the multi criterion decision making, which determines the weight of each factor by the method of couples. On the basis of standardized values of forest roles and their calculated weights a suitability map of adequacy of regulatory units for the forest roads construction was designed. The suitability of individual economically founded planned routes of forest roads is different from the aspect of individual forest roles. This is shown in the case study and represents a new quality approach in planning the opening of forests.
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