No abstract

Culvert pipes are one of the largest categories of engineering structures on roads of both regional and federal significance. During operation, the structure is affected by static and dynamic loads, for example, from the weight of the dam and passing vehicles, temperature changes, melt, and rainwater is directly flowing through the pipe, streams and small rivers, as well as geological factors - earthquakes, shifts, and vibrations ground. Also, over time, the installed reinforced concrete sections of the conduit have a habit of shifting in horizontal and vertical directions under the influence of various kinds of loads, which leads to the formation of gaps and differences between them. Swings reduce the effective cross-section of the pipe, throughput, and lead to silting. Under flood conditions, the presence of discrepancies between the links of the tube leads to significant erosion, leaving voids in the dam, which is fraught with the collapse of the roadbed and road pavement, and in such situation, it is impossible to talk about the possibility of road operation as a whole. The traditional effective solution to this problem is culvert repair. Identifying the need for repair or reconstruction of the structure is the primary purpose of assessing the technical condition during the professional inspection of culverts.

The article analyzes the experience of Russian cities that provide toll roads charging. Based on the analysis, rates for toll roads were proposed depending on the category of vehicles, corresponding to the volume and quality of services provided to the user of the toll road. Based on the data obtained and the methodology for calculating the rate for vehicles on toll roads, the calculation of the amount of savings received by users when driving a toll road, compared with an alternative free route, was made. The calculation included determining the cost of operating a vehicle when driving through a toll road facility by reducing the consumption of fuel and lubricants, tire wear, repair costs, and other items of operating costs. The advantage for users of toll roads was determined by saving time for delivery of goods and passengers, increasing comfort and traffic safety. Additional attraction of funds through placement of gas stations and advertising is considered. The payback period of the toll road has been determined. The conclusion is made about the need for further research on the problems of development of the network of toll roads.

Abstract. Road construction machinery is one of the largest and stable sectors of national economy. With the help of road-building machinery, construction, maintenance and repair of highways are carried out. Modern system of road and building machines is a complex of high-performance machines and mechanisms, of large and small capacity and productivity. Expansion of paved roads network of both federal and local values, use of resource-saving technologies, increasing of pace and quality of work, ensuring of reliability and durability of highways have a major impact on the development of road construction machinery. The level of foreign road and construction machinery puts forward complex requirements for compliance with world safety and environmental standards, increasing equipment mobility, expanding areas of effective use and, finally, increasing its capacity and productivity. Article contains approach to the calculation of the operational productivity of asphalt pavers that takes into account technical characteristics and conditions of works production and contributes to the reliability of decisions on organization and management of road maintenance works on urban roads.Roads are of strategic importance for any country, and for Russian Federation especially because of the vast territory which it occupies. Their quality, pace of construction, possibility of using fundamentally new technologies, structures and materials, as well as the cost, are largely determined by the availability of modern highway engineering machinery. In this regard, Federal Road Agency Rosavtodor, guided by the Transport Strategy of Russian Federation, develops interdepartmental programs for the development of road machinery.The main focus is on import substitution, by creating conditions for the production of machinery and equipment on the territory of Russian Federation, rising of technical level and reliability of existing machines, creating fundamentally new models of road construction machinery and equipment. As a result, in recent decades, plants have mastered the production of new models of highway engineering machinery.Technology of highways construction provides the use of high-performance mechanized links of road machinery. For upper layers of asphalt concrete pavements arrangement, a set consisting of an asphalt paver and a link of road rollers is used. In many aspects the quality and service life of the pavement depends from this set of machines.Determining factors in the intensity and quality of repair works of hot mix asphalt concrete pavements are: production of the mixture at the asphalt concrete plant, delivery of the mixture to an object by motor transport, preparation of the required existing coating operations, laying and compaction processes of mixture (Figure 1). The correlation coefficient -0,98, standard deviation 0,107. Due to the high performance of the asphalt

Nowadays, the age of most transport facilities in Russian Federation is estimated in many decades. Consequently, there is an urgent need for periodic surveys and monitoring of the state of each structure, its individual structural elements. The main purpose of these measures is to maintain the high performance indicators of the transport structure, the achievement of which is impossible without examination, analysis and evaluation of parts of the structure that are in the aquatic environment and, as a consequence, the occurrence and development of various types and degrees of defects and damages. The most important conditions for ensuring uninterrupted and safe traffic along the bridges of vehicles and pedestrians are: the normative load-carrying capacity of the structure; required clearance of the roadway and sidewalks; compliance with traffic safety requirements for bridges; observance of characteristics and maintenance of the bridge capacity for the period of ice drift and high water; timely performance of work on the care, maintenance and repair of the elements of the bridge. Technically sound structures and their reliability can be ensured if all the parameters of the road category structure and the requirements of regulatory documents are met. The work presents the survey materials of the bridge. Classification of defects by group and class of danger. The results of determining the carrying capacity on the basis of the survey are given.