This article reviews the problem of measuring the actual radius of curvature for curved sections of existing forest roads, as forestry enterprises require reliable technical information about the current conditions of operated transport networks. It was identified that at this moment, a selection of methods are used for measuring the radii of horizontal curved sections of roads, which have certain advantages and disadvantages in specific natural production conditions. For calculating the radius of curvature for auto forest road projects it is recommended to apply the method of measured angles by chord angle deviation, which is sufficiently accurate for engineering purposes and does not require usage of special high-precision equipment and tools.

As important for the design of cable logging systems both theoretically and practically, the optimization problem regarding the optimal length of the skyline was determined. In the process of modeling the shape of the sagging curve of the holding cable, the objective function is constructed in the form of a transcendental equation, whose roots are determined by iterative and graphical-analytical methods. A numerical analysis of the problem is carried out. To calculate the optimal length of the skyline, a software algorithm, an engineering formula, and nomograms are proposed.

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