This article discusses the technological possibility of controlling surface roughness parameters in a wide range of values, from processing surfaces made in the preparation operations to finishing at the nanoscale. The studies used samples made of 20Kh13, 08Kh18N9T, AISI 304, AISI 310, materials obtained by SLM technology, AISI 316L steel, and nickel-based heat-resistant alloys such as EP648 and Inconel 718. It was shown that the processing involves a sequential combination of focused electrolyte plasma jet processing followed by focused glow discharge plasma finishing. It has been shown that pre-treatment can reduce the roughness parameter from Ra 80 μm to Ra 0.2 μm for various stainless steels and alloys produced by SLM technology, while finishing can reduce the roughness parameter from Ra 0.2 to Ra 0.004 μm, as is the case for 08X18N9T stainless steel. Atomic force microscopy shows that the surface of stainless-steel samples after jet electrolyte-plasma treatment has an average surface height of Sa 11.713 nm at 2499.515 μm2. The results of these studies can be used for surface treatment of stainless steels and alloys in medicine and other fields.

Road construction works are one of the conditions for ensuring road safety. The work determines the impact of reconstruction (with an increase in the number of lanes without barriers separating traffic flows), major repairs (with an increase in the number of lanes with and without barriers; without an increase in the number of lanes) and bridge repairs on changes in the number of registered accidents. The method of research was the calculation of the coefficient of change in accidents using a statistical comparison of "before" and "after".

Modern transport logistics increasingly includes intelligent components that improve physical objects. The use of the Internet of Things, artificial intelligence systems and data analysis significantly improve logistics processes. At the same time, loading and unloading operations are a key stage in the cargo delivery system to points of sale. Improving the loading and unloading processes is a difficult task, which is solved using simulation models. They contribute to improving the overall efficiency of these operations. The article presents the process of developing a simulation model of the unloading process, performs an experiment to optimize the parameters of the model, and calculates the effectiveness of the development.

The work discusses the technological improvement of combined electrochemical processing (ECM) of thin profile holes of injectors, provides data on rational processing modes and results that indicate the prospects of using this method in industry.

The application of dimensional-accuracy analysis in the development of new and improvement of existing designs of electromechanical sensors is shown, which makes it possible to establish the reasons for the high labor intensity of fitting and adjustment work during their manufacture and to identify ways to reduce it. The most rational solutions are presented to ensure the accuracy of the design of an electromechanical pressure sensor.

At the moment, traditional processing methods are deeply studied and fully implemented in all branches of mechanical engineering. Many experts believe that in the future we should not expect their large-scale development and new discoveries in this area, and if any appear, they will not be competitive enough. A new global method for the development of technological processes is considered to be the study and widespread introduction into the creation of new technological processes with the introduction of combined processing methods. They try to combine mechanical, chemical, thermal and similar phenomena. Their combined use can give a new breakthrough in the development of metalworking sequence design.

The use of difficult-to-process heat-resistant alloys is widely used in the design of aircraft engines and gas pumping units. As a rule, thin-walled shell structures are made from them, providing a high density of the layout (for example, blades, electric unicycles). The peculiarity of the manufac-ture of such structures is a small (compared to the occupied volume of the entire product) volume of metal, in which the heat generated during shaping is distributed. Given the low thermal conductivity of such alloys (up to 4-5 times less compared to steels), the shaping of parts from them is associated with the risk of warping in combination with low productivity of blade processing with carbide tools. More effective, but little studied is the processing with tools made of mineral ceramics with the introduction of the energy of the ultrasonic field into the cutting zone. The purpose of the research is to develop a high-performance technology for pre-processing workpieces made of heat-resistant alloys with tools made of mineral ceramics, characterized by a minimum depth of defects in the surface layer.
 Methods. The research was carried out on machine tools in the manufacture of non-rigid parts of aircraft by turning blanks from the heat-resistant alloy HN45MVTYUBR with cutters made of mineral ceramics with the introduction of the energy of the ultrasonic field into the processing zone. 
 It has been established that the use of ultrasonic vibrations during pretreatment with mineral-ceramic tools without coolant can reduce the depth of the defective layer by up to one and a half times and increase productivity by up to 30 times.
 Taking into account the reduction in the depth of the defective layer, it becomes possible to reduce the allowances for final processing, and consequently, to reduce the duration of the technological process and the cost of manufacturing parts.

Promising mathematical and logical models for diagnosing the technical condition of the braking systems of highly automated vehicles, in order to detect and prevent the occurrence of faults in time, as well as to improve traffic safety are proposed.

The studies that formed the basis of this article were conducted in order to improve the quality of operation of multifunctional ground vehicles, including special ones. The object of the study is special multifunctional wheeled transport and technological machines and complexes, their transmission units. The choice is due to the good adaptability of these vehicles to operation in the conditions of the road networks of the North, Siberia and the Far East.

The research is aimed at expanding the technological capabilities of electrical processing methods through the use of programming systems for the technical characteristics of electrode tools (EI) directly in a digital model with their subsequent production by additive methods. The article discusses the issues of obtaining parts of complex shape. This is realized by the method of preliminary 3D printing of the electrode-tool with subsequent metallization of the working surfaces, which excludes finishing with the use of expensive equipment. However, the process of designing such a tool is associated with the complexity of its implementation for the conditions of a single or pilot production. The approach proposed by the authors to the design and manufacture of a complex-shaped combined EI makes it possible to significantly reduce its cost, especially at the stage of debugging the technological process in the conditions of launching the product into production.