Introduction. The paper describes the actual problem of increasing the operating life of the brush working body (BWB) and improving the cleaning quality. Moreover, the authors discuss the factors affecting the quality of the road surface cleaning and the brush pile resource.
Materials and methods. The research presents the results of the interaction process of the BWB pile with the cleaned surface of the roadway. In addition, the authors demonstrate the mathematical model of the interaction process with the basic surface. The simulation is carried out using the MATLAB software and Simulink extension. The authors also identify the factors that contribute the efficiency reduction of the municipal machine working process.
Results. As a result of the simulation, the authors obtained the graphs of the pile deformation changing and the BWB pressing force changing. When processing the experimental data the researches also obtained the graphs of the brush pile plotted deformation from the BWB contact force and from 2, 3, 4 disks. For further mathematical modeling the authors determined the stiffness of the BWB pile under various loads. Therefore, the paper presents the approximation of the experimental dependence of the brush pile deformation on the pressing force and shows the regression equation.
Conclusion. In conclusion, the authors determined the elastic characteristics of the BWB pile. By the comparing process of the experimental and theoretical data obtained from the mathematical model analysis, the authors found that the difference between them was less than 10%. The obtained results allowed confirming the mathematical model adequacy of the interaction process between the  BWB pile and the cleaning surface.

Introduction. The authors present the numerical calculation of the hydro-liquid leakage through
the radial clearance of the “piston - hydraulic cylinder” conjugate node on the basis of determining
the sealing elements’ resource of the tower crane hydraulic cylinder.
Materials and methods. The authors use the method of mathematical modeling, which makes it possible to model the containing elements’ interaction of different physical nature on the unified methodological basis. Moreover, the paper presents such simulation systems as Simulation (finite element method), Flow Simulation (finite volume method) of the SolidWorks CAD program and Simulink Matlab with expansion packs.
Results. As a result, the authors demonstrate the three-dimensional and irregular cross-section conjugation model of the radial clearance in the “piston - hydraulic cylinder” conjugate node. In addition, the authors propose the calculating method of the hydraulic cylinder tightness. Such method establishes the following scheme: “load on the hydraulic cylinder —number of operating cycles — uneven radial clearance between the piston and the liner — amount of fluid leakage — shrinkage of the rod”.
Discussion and conclusions. The results of the research make it possible to increase the reliability of the power hydraulic cylinders of the road construction machines and equipment.

Introduction. The air temperature in the intake manifold is used by an electronic engine control unit to adjust the injection time of the fuel injector top. The intake air temperature is variable and depends on the operating conditions of the vehicle. When air intake temperature decreases, the duration of the nozzle opening pulse increases and, conversely, as air intake temperature increases, the duration of the
nozzle opening pulse decreases.
Materials and methods. The paper demonstrates the analysis of the air temperature effect in the intake manifold of the engine on the duration of the injector opening pulse while the engine is idling and when the vehicle is moving with different speed conditions on the flat,  mountainous and alpine sections of the road.
Results. As a result, the research showes that the movement of the car at high speeds on the flat sections of the road leads to a significant decrease of air temperature in the intake manifold and an increase in the duration of the injector opening pulse. Moreover, when the vehicle moves on the mountainous sections of the road, the effect of air temperature in the intake manifold on the nozzle opening impulse duration is insignificant, since the speed of the vehicle movement is influenced by the complexity of the terrain and the parameters of the mountain and high-mountain roads. 

Introduction. To increase the competitiveness of the services it is recommended to update the rollingstock of PMTE, which would be adapted for the passengers with limited mobility and adjusted to the continental climate. Therefore, new buses with high carrying capacity would positively influence the passenger services’ quality. Renewal of rolling-stock is an important step for the further development of the Kyzyl region. The authors developed the algorithm for the buses replacement prioritization. Moreover, the authors examined the positive and negative aspects of the credit and leasing process when buying vehicles.
Materials and methods. The paper presents the algorithm for choosing the form of the rolling-stock renewal financing, taking into account the leasing and credit specification. In addition, the authors consider the financing sources in details. As can be seen, it is important to use buses  of small and very small capacity in a small city.
Results. As a result, the paper presents the comparison of the leasing and credit for rolling-stock purchase.
Discussion and conclusion. The conducted comparison shows that leasing is the most efficient process than credit.

Introduction. The introduction of innovative technologies and materials in road construction is difficult due to a number of constraints, the solution of which is an urgent task of the construction industry. The competitive advantages of innovative materials (polymer-mineral composition “Nicoflok”) relative to traditional ones are considered on the example of the soil strengthening technology. The results of the research show the inconsistency of the regulatory and legal framework of the road sector in terms of the innovative technologies (materials) application. Such results suggest quickly update, refining both the characteristics of materials and methods for assessing the usage effectiveness. Thus, it is possible to increase the reliability of decisions made on the repair and construction of roads, and, as a consequence, increase their service.
Materials and methods. The research was carried out in the course of construction (repair) work on the pilot road sections, as well as after a year of their operation. The authors used the regulatory documents and standard test methods for determining the physic, mechanical and deformation characteristics of soils and materials reinforced by the Nicoflok. Taking into account the obtained characteristics of the materials, the authors calculated an equal strength pavement structure using a licensed software product. According to the developed design options, the estimated cost of pavement construction was also calculated.
Results. The results of the research allow authors to conclude that the physic and mechanical characteristics of the reinforced material are improved. At the same time, the competitive ability for the additive usage also increases.
Discussion and conclusions. The paper shows the inconsistency of the regulatory and legal framework in the road sector in terms of the application of innovative technologies (materials). Moreover, the authors suggest the need to quickly update, clarifying both the characteristics of materials and methods for evaluating the usage effectiveness.

Introduction. The submergence by underground water remains one of the problems in urban construction. It is also associated with the movement of groundwater under buildings and structures. Such processes are non-stationary and their calculation is complex. The paper begins the series of researches on the methodology for solving problems of filtering groundwater while protecting against flooding in urban construction by using an operator method. Oliver Heaviside began the practical application of mathematical operators for solving engineering problems. The operator method with Laplace transformations was used. It was shown how, with the help of the Internet and Maxima program, it is easy to make inverse Laplace transformations.
Methods and materials. The author considered the decision on the submergence of the city road in the presence of a dome watering under asphalt pavement in the dirt road foundation. At the same time, for filtration problems of such type, the author took into account the compaction of the engineering zone of the soil under the road. The paper showed how to solve the complex non-stationary problem of spreading the dome of the flooding under the city road. The technology of the solution is presented not only with all the mathematical details of the operator method, but also provided with new physical representations. Such an original approach, by the author’s opinion, would help better understanding of the flooding process physics in urban construction. Moreover, it would allow solving problems of protection against flooding by a new, more efficient way, taking into account the real non-stationary processes of filtration of groundwater in built-up areas.
Discussion. As a result, the author presents anew statement of the operator method for solving the submergence specific problem in urban construction. First, a specific example demonstrates how to use the Internet and the license-free Maxima program. In this case, the simplest  case is taken, in the form of the electricity and filtration analogy. Then the author considers the filtration spreading of the domed man-made groundwater beneath the city road. Therefore, the paper demonstrates new solutions for non-stationary filtration of groundwater in the engineering zone, which are also compared with the world practice results.
Conclusions. The author presents the methodology for solving unsteady groundwater filtration problems for the submergence protection in urban construction by using the operator method and Laplace transformations. Such decisions make it possible to obtain convenient engineering formulae, by which groundwater levels, substantiate practical solutions and measures for protection against submergence in urban construction could be found. The author intends to further development of such scientific ideas and solutions for submergence protection in the built-up areas.

Introduction. The paper presents the prefabricated whole-glued slab-ribbed superstructures, containing glued beams (fins) and a multi-layered wood-panel from horizontal cross-layers of blank boards, laid successively on glued beams and each other and interconnected by glue seams.
Materials and methods. Because of the development of the constructive and technological forms of the considered superstructures, the authors propose the structure composed of plate and ribbed integrally transported prefabricated sections with the width of 3-3.5 m. The authors highlight that the combined action of the detached sections is provided through the nodes of combination on the adjacent ribs of  the sections without the complicated compression of all the elements of the superstructure including beams, plates, and diaphragms.
Results. The analysis of the stress-deformed span by two methods indicates that both methods determine, with a sufficient degree of accuracy, the nature of the distribution of stresses and strains in sections of the structure. Moreover, the obtained values of the maximum deflections and stresses do not exceed the limit values established by the norms and the corresponding values in a similar construction of the structure with a solid timber slab.
Conclusions. The paper shows that the proposed construction with the division of the whole-glued multiridged span structure into separate prefabricated, factory-made sections would significantly expand the usage of laminated wood in bridge construction.