The article discusses the effect of adhesive additives on the performance properties of asphalt concrete. The authors give a comprehensive overview of the problem of durability of asphalt concrete layers, in particular in the autumn-spring period, emphasizing the importance of this issue for traffic safety. Then they discuss the role of adhesive additives in improving the performance of asphalt concrete by improving its physical and mechanical properties. The authors selected a number of adhesive additives, and also carried out the selection of asphalt concrete mixture according to the methodology of volumetric and functional design. The article contains a detailed description of the method for determining water resistance and adhesive properties. The authors also consider the effect of adhesive additives on the fatigue life of asphalt concrete. The text of the article provides a detailed description of the method for determining fatigue strength during repeated bending. In conclusion, the article emphasizes the importance of using adhesive additives to improve the performance and durability of asphalt concrete. The authors emphasize the importance of the study for extending the service life of asphalt concrete layers and increasing their repair time.

Keywords: bitumen, adhesive additive, low temperature property, water resistance, fatigue properties, composition selection, volumetric and functional design, durability, road, asphalt concrete, testing

The influence of surfactants, in particular adhesive and reducing additives, on the low-temperature and rheological properties of road bitumen is considered. Tests of the low-temperature properties of road bitumen with and without the use of appropriate additives were carried out, followed by a comparison of the results. Also, in order to assess the effect of the above surfactants on the ability of road bitumen to retain its properties over time, a comparative analysis of bitumen samples subjected to the aging process was carried out. In general, the results of this study indicate that the use of surfactants can lead to an increase in the durability of road bitumen, even at low temperatures.

Keywords: bitumen, surfactant, additive, low-temperature property, durability, road, asphalt concrete, rheology, aging process, testing

This article deals with the issue of the installation of traffic lights on the urban road network. A technique has been developed to select the method for controlling pedestrian traffic lights, and a model has been proposed for determining conditions for regulating pedestrian and traffic flows depending on intensity. The installation parameters of traffic and pedestrian traffic lights

Keywords: светофорные объекты, заторовая ситуация, пропускная способность, методика управления движением, безопасность движения, регулирование транспортных потоков, эффективность дорожного движения, аварийность, экологическая безопасность, интенсивность движения

Calculation of coefficient of operating conditions of the pipeline is presented in article for the West Siberian region. Dependence of service life of the pipeline on this coefficient is presented. The data of samples witnesses received in laboratory of nondestructive control, confirming relevance of this subject are provided.

Keywords: corrosion, wall thickness, standard service life, pipeline, coefficient of working conditions, diameter, pressure, settlement resistance.

In article statistical data on failures on a linear part of the main gas pipelines are presented, the reasons of their emergence are defined. Standard scenarios of development of emergencies are provided, and also the basic principles of determination of frequency of emergence of failures are shined.

Keywords: accident, analysis, diameter, linear part of the main gas pipelines, depressurization, scenario, pipeline.