When planning the construction of a forest road and choosing its rational position on the ground, engineer is constantly faced with the need to take into account the features of the relief, climate, physical and geographical processes and phenomena, surface and underground waters, soil, vegetation, and human economic activity, as factors determining the first first of all, the cost of the construction of a forest road. A correlation analysis carried out for all the arguments has made it possible to establish the most important characteristics of the components of the geographic environment that affect the complexity of constructing a timber road by cost type. The state of theoretical research in the field of construction of departmental motorways has been thoroughly reviewed and analyzed. The analysis made it possible to outline the goals, objectives and general methodology for determining the cost of building roads, depending on the type of work, as well as varying degrees of complexity of road construction, the value of natural resources, and the specific qualities of the territory in the area of the road. The presented results and dependencies may be the basis for determining the basic cost of road construction