In the road industry regulatory framework, there is a noticeable overabundance of governing documents. Many standards developed in the last decade are rather poorly developed, and also completely ignore the continuity with documents related to the subject matter. Unfortunately, contradictions in regulatory requirements for the same type of product are often created on purpose. Sometimes the contradictions are so significant that, for example, the same building material with specific established characteristics can be classified according to related state standards in completely different ways. The described situation, among other things, affected the governing documents that contain information on the requirements for sands.

The article presents the discrepancies between the four state standards in terms of the classification of sands, explains what difficulties the new classification and a set of requirements for the criteria for assigning a group of sand leads to. The problems arising in the design of road pavements are described, including according to the new preliminary national standard PNST 542-2021, in which the requirements for sands proposed by the same technical committee that lobbed PNST 542-2021 (TC 418 «Road sector»).

The modern methodology for designing flexible road pavements began to develop from the simplest techniques based on empirical laws. Quite quickly, international practice moved to the use of semi-empirical methods with various basic theoretical models. Semi-empirical methods have been the most widespread and fairly well tested for many decades. Taking into account the experience gained in their application in a particular country, these methods were corrected, but their theoretical component remained unchanged. Semi-empirical methods compete with mechanical-empirical models that appeared later, which, in addition to calculation, also make it possible to predict indicators of the operational state, allowing verification of engineering solutions for compliance with operational requirements, regulatory rules or customer wishes. It became clear that the future of pavement design would be with mechanical-empirical methods. Restraining their widespread adoption is associated with marketing value, local conservatism and insufficient statistics on the accuracy of forecasting performance indicators. But even in difficult economic conditions, for example, such as in the Syrian Arab Republic, the transition to mechanical-empirical methods of pavement design will provide the greatest efficiency of engineering solutions for flexible road pavements.

Singularity issues and the main directions of development of technological machines are considered in the article.  A brief analysis of the directions of possible application of artificial intelligence and information technologies in the field of creation and operation of modern technology is given. The prospects for the development of educational standards on these issues are considered.

This article is devoted to the review of compact sweeping equipment. The authors analyzed the machines presented on the market, highlighted the main functions performed. The main parameters of comparison of compact equipment models are determined, on the basis of which a comparative table of technical characteristics is compiled. As a result of the review, the classification according to several criteria is presented and the main directions for the development of working equipment of compact harvesting machines in accordance with the defined functions are determined.

The article examines a prototype sports motorcycle four-stroke gasoline engine capable of switching to a 2-stroke cycle at low and medium revs under full load. The engine must be equipped with a compressor in order to ensure the best purge in two-stroke mode. The engine improves speed characteristics, namely power and torque at low speeds, as well as the dynamic performance of the motorcycle itself (acceleration from 0 to 100 km/h). According to the calculation method, it was possible to determine that the power of the motorcycle will increase by 1.5 times at a low speed, and the acceleration will decrease by 0.62 sec. The data were obtained on the basis of calculation modules developed at The Moscow Automobile and Road Construction State Technical University (MADI). The consistency of the results was tested on a prototype 2/4-Sight engine.

The article discusses the main capabilities of the FlowVision software package using the example of heat engineering and gas-dynamic problems and the main modules of the program are reviewed briefly in the report. Examples of the simplest problems of heat conduction, free and forced convection with different boundary conditions and initial data are given. The calculation results are analyzed and the basic numerical data are obtained with the help of advanced visualization and data processing tools implemented in FlowVision. The results are presented in the form of color outlines, graphs and numerical data. The analysis of the data was carried out for various initial data and the corresponding conclusions were drawn. Various gas-dynamic problems (laminar and turbulent flow of gases or liquids), as well as models of gas mixing are considered.

The article considers the features of modeling and calculating the structure-borne noise of an internal combustion engine at different stages of its design: external and internal design. A comparison of methods and software tools for calculating the structural noise of the engine from the working process and piston tilts, the necessary initial data and calculation results at the stages of external and internal design is carried out. It is shown that with a detailed study of the working process and the design of the engine it is advisable to use object-oriented complexes, for example, AVL Excite, which allows you to get detailed information on the sound field of the engine to determine the main parts-noise emitters. If it is necessary to calculate the transient modes the software complexes "Working process " and "Internal Combustion Engine Acoustics" developed at the Department of "Heat Engineering and Automotive engines" of MADI can be used.

Diesel engines are widely used as power plants of modern commercial vehicles. To improve their economic and environmental performance, common rail fuel systems with electronic control and injection pressures up to 200 MPa and higher are used. With an increase in the injection pressure, the influence of the shape and dynamics of the injected fuel spray on the working process of the diesel engine increases. In this regard, it is relevant to analyze the influence of the operating mode of the commmon rail fuel system spray on the diesel indicators. A method for estimating the physical parameters of the injected fuel spray has been developed and a study has been conducted on an experimental installation.

The fuel injection pressure is one of the main factors affecting the performance of a diesel engine. The article presents the results obtained by modeling the working process of the 1CHN12/13 engine using the AVL FIRE software package to evaluate the effect of increasing the pressure in the fuel accumulator up to 300 MPa. The results show that an increase in cancer increases the intensity of the combustion process. With an increase in the pressure of the cancer from 150 to 300 MPa, the content of nitrogen oxides NO_x decreased by 23.2%, and soot-by 58.1%. However, NO_x does not reach the level corresponding to Euro 6-0.4 g/(kW·h). Therefore, it is necessary to use exhaust gas recirculation (EGR) in combination with ultra-high injection pressure. When applying the degree of recirculation Rc = 27%, NO_x emissions comply with Euro 6 standards. The soot content decreased by 55.6%, NOx-by 93%. However, the brake fuel consumption increases by 4.9% without EGR and by 4.7% at Rc = 27% and the indicator power decreased by 4.3%.

Currently, environmental standards are established for diesel engines, which, depending on their purpose, differ both in the number of normalized toxic components and in their maximum permissible levels. The implementation of the current requirements for the content of toxic substances in diesel exhaust gases while ensuring the required level of economic and power indicators is associated with the organization of joint management of all the main systems of the power plant. Such systems include the fuel system, the boost system, the exhaust gas recirculation and neutralization systems. The works of recent years show that further improvement of the common rail fuel systems used on diesels is associated with an increase in the injection pressure and control of the injection rate. To analyze the influence of pressure in the fuel accumulator and the duration of the control pulse on the parameters of the injection process, a method for determining the injection characteristics using the MADI chamber and taking into account the pressure oscillations accompanying the process of registering pressure changes in it has been developed. The influence of the pressure value in the fuel accumulator and the duration of the control pulses arriving at the electromagnetic valve of the common rail injector on the shape of the leading edge of the injection rates and wave phenomena occurring in the high-pressure line at the outlet of the nozzle is investigated.

This article discusses measures to prevent a fire at the projected fuel section of a motor transport enterprise for 303 Gazelle city buses.

The influence of agglomerations on the economy of the regions of the Russian Federation is considered, the features of constructing a macroeconomic model of spatial development in the conditions of economic transformation are revealed. The goals of the state economic policy at the regional level are defined and systematized. The analysis of socio-economic indicators of the functioning of agglomerations of the Russian Federation for 2018-2020 is carried out. The issues of changes in the territorial development of the Russian Federation and the system of state control are studied. The «agglomeration effect» is considered, and the degree of concentration and diversification of production for a number of regions of the Russian Federation is determined. The role of agglomerations in the development of regional economic structures is analyzed. It is proved that the activity of agglomerations increases the competitiveness of territorial entities and the national economy as a whole. The logical result of the study was the conclusion that improving the spatial organization of the country will allow overcoming the limited territorial resources and strengthening the national security of the Russian Federation.

The article "Advantages and problems of using the warehouse management system (WMS) in logistics" is devoted to a comprehensive study of the use of intelligent information technologies on the example of WMS-systems. The main attention is paid to the positive characteristics of the use of the WMS-system. The article describes the stages of finding a suitable WMS-system for clients. The authors demonstrated in detail the principle of operation of the WMS-system with the decoding of the content of operations at each stage of the process of processing the product flow in the warehouse. The article reveals the main properties of the WMS-system. The authors consider in detail the structure of a conditional warehouse with an embedded WMS-system, give examples of the structure of food stored in it, and consider barcodes in detail. The article summarizes some results on the problems of using WMS-systems, and also identifies the advantages that an organization acquires after implementing a WMS system.

Training practice in remote form during the last two years (2020 and 2021) is due to the complex social situation associated with measures to prevent the spread of the COVID - 19. In this situation, the authors, as one of the responsible teachers for conducting practice at MADI, attempted on the basis of empirical material to make some theoretical generalizations and make recommendations for its implementation. Based on the tasks of educational practice, the following aspects were taken into account: the specifics of the training direction, the number of students, the choice of a large specialized company, the opportunity to organize distance learning training, and the features of the "feedback" of students.

In order to write a scientific article that will cause a scientific interest, will be published and in demand in the professional circle, it is important to know the basics of creating a scientific publication. When writing an article, there are often difficulties associated with the publication process. The work should be original, contain the main part of the research, conclusions, have a clear structure and be based on a theoretical basis. Such a publication is unconditional to attract the attention of experts in their field, will benefit readers and the author.

When publishing an article, you should remember that a lot decides the name of the publication. It should correspond to the topic of research, contain keywords on which it will be possible to easily find a job. The title should be weighty and compelling, to attract attention. The purpose of this article is to study the basics of creating scientific publications by masters in the learning process.

This publication discusses the types of scientific articles, presents the principles for constructing the material, gives examples of the use of scientific style, and gives recommendations on writing headings on the example of existing works. The article discusses the algorithm for writing the main sections and the use of terminology. The article was prepared to help the researcher in the work on a scientific publication.