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The article reflects the relevance of the mechanization of work and individual operations in the course of planned thinning in forests of various types. The specific operating conditions of machines used for this type of forestry work are determined. The principles of construction of transmissions of machines for various purposes are considered, a method for determining external parameters and constructing a kinematic diagram of an inter-axle controlled power distribution mechanism in its composition is proposed. The results of kinematic and force analysis for the considered example of the mechanism are presented. Prospects for using the mechanisms of this family are formulated.

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According to the records of the World Health Organization for the year 2018, mortality rate due to road traffic accidents (RTAs) in Russia is equal to 18 RTAs per 100,000 citizens. It ranks Russia the 72th among all the other countries in the world. Statistics of the road traffic accidents occurring between 2013 and 2019 was analyzed in order to reveal the major reasons thereof. The method of levelling of longstanding tendencies by analytical dependencies was used for the evaluation of dynamics and predictions of RTA number. As a result, predicted number of RTAs in 2020 in case of linear dependency was equal to 2118 cases and 1816 cases in case of tendency line. Common RTAs include collisions, hitting of pedestrians and falling of passengers. Most RTAs occur near apartment buildings with death toll rise by 23 % (27 deaths 2018/2017) and 218 % rise (2018/2017) in the number of RTAs near nonresidential buildings.