Transport Roads Research Articles

Research on chlorine salt antifreeze road dust suppressants for open-pit coal mines

In addressing the significant challenge of trucking road dust emanating from open-cast coal mines, the prevalent method of conventional water sprinkling for dust removal on transport roads has proven suboptimal. This inadequacy is attributed to the pronounced mobility of truck transport roads, substantial dust loads, and extensive open dust sources. Particularly in cold mining regions, the use of water in winter exacerbates the issue by causing icy road surfaces, thereby increasing the risk of truck skidding and overturning, posing a severe hazard to both mine safety and the well-being of truck drivers. A pragmatic imperative exists to devise a solution that effectively addresses both anti-freezing and dust suppression in open-pit coal mine roads, while minimizing corrosive impact. Against the backdrop of Hebei Open-pit Coal Mine in Huolin, Inner Mongolia, this study focuses on the development of a chloride salt antifreeze-type road dust inhibitor tailored for open-pit transportation roads. The proprietary anti-freezing dust suppressant achieves a freezing point as low as −36.4 °C, exhibiting corrosion efficiency merely at 56.5% of that of water. Notably, the effective dust suppression duration surpasses that of water by a factor of 150, resulting in a 53% reduction in dust suppression costs. This innovation is specifically applicable to high-cold and arid surface coal mines in northern regions and similar mining contexts. It offers technical support for the establishment of environmentally sustainable practices in surface coal mines, representing a pivotal step toward the realization of green mining initiatives.

Response of road erosion to hydrological connectivity under a heavy rainstorm in an agricultural watershed on the Loess Plateau

Road network extension is closely associated with soil erosion in watersheds during frequent extreme rainfall events. Identifying potential risk areas that actively deliver surface runoff to road structures and channel networks is critical for comprehending hydrological processes and controlling road erosion. In this study, the road erosion (landslides, collapses, scour pits, and gullies on monitored roads) on the Loess Plateau during a heavy rainstorm was analyzed using field survey and unmanned aerial vehicle (UAV) data. We defined hydrological connections as the intersections of roads and channel networks, and the activated hydrological connections represent hydrological connectivity. The results of this study highlight the exacerbating effect of hydrological connectivity on road erosion during a rainstorm in an agricultural watershed in the Loess Plateau region. The results showed that the road erosion intensity ranged from 2.16 × 102 to 1.02 × 104 t/ha. Strong hydrological connectivity resulted in average soil erosion amounts of landslides, collapses, scour pits, and gullies in the downslope area that were 2.16, 1.78, 5.46, and 6.98 times greater than those without hydrological connectivity, respectively. The presence of hydrological connectivity generated a 1.88 times higher road surface erosion intensity than that without hydrological connectivity. The Upslope-Road connections created the most significant enhancement effect on road erosion, and up to 65.37 % landslide erosion and 41.97 % collapse erosion amounts were influenced by these connections.The enhancement effect of Upslope–Road connections on road erosion varied with different road types, this impact of Upslope–Road connections on road erosion were only observed on the landslide erosion of petroleum transport roads and the collapse erosion of agricultural roads. Conversely, Road–Downslope connections did not significantly impact road erosion (p > 0.05). To effectively control the negative effect of road erosion, hydrological connections should be identified and regulated to impede hydrological connectivity activation during rainstorms by modifying tillage activities, improving road maintenance, and strengthening drainage systems.

Legal nature of public-private partnership in the field of construction and operation of transport roads in Ukraine

Legal nature of public-private partnership in the field of construction and operation of transport roads in Ukraine

The land transport efficiency in Wasit Governorate: Urban and rural settlements

The study of human factors and the extent of their impact on the construction of land transport roads is of great importance because they are variable factors, which are on the contrary natural factors, and the impact of human factors on road construction operations is evident through the study of population distribution and size, and economic activities (agricultural, industrial, tourism). And its direct mutual relationship with the construction and extension of land transport routes and the development of each of them, and then directing them to serve urban and rural human settlements, which leads to their development and improvement of their economic, living and social conditions on the one hand, and contributes to the emergence of new centers for human settlement on the other hand.

Vulnerability analysis of public transit systems from the perspective of the traffic situation

The critical to sustainable urban development that a robust bus transit system is constructed to alleviate urban congestion problems. Unfortunately, disruptions in bus transit systems can lead to dysfunction and threaten sustainable development. This paper proposed a vulnerability analysis model for constructing complementary urban bus networks (UBNs), which considers the actual capacity of the bus network at the speed of transport roads. In addition, the UBNs aimed analysis method is presented from three specific aspects: (a) utilizing the stochastic user equilibrium model and different traffic situations to measure the UBNs of passenger flow distribution according to multi-source data; (b) introducing the node capacity and structural, functional vulnerability analysis model by combining real traffic flows and the complex network theory; (c) analysing the vulnerability characteristics of UBNs cascading failures from different passenger flow distributions and increasing capacity parameters, and comparing with those under different attack methods. Then, the new vulnerability analysis model is applied to the Harbin trunk bus. Considering different attack scenarios, the UBNs show strong vulnerability in the case of high congestion. Compared with other deliberate attacks, the bus network based on the attack mode of the maximum intensity site is more vulnerable at different times. These insights could be used to inform a vulnerability-based spatiotemporal design of bus transit networks.

Statistical parameters in assessing ecological and geochemical state of the Kolpashevo-Turukhan mineragenic zone eastern part

The relevance. The required statistical identification of natural and anthropogenic biogeochemical anomalies when conducting ecological and geochemical studies on the territories of buried exogenous ores with a weak anthropogenic pressure. The difficulty of their identification according to their sources is related to a similar litho-siderophilic geochemical specialization of sedimentary rocks of iron ore, titanium-zirconium formations and modern soils of taiga zone landscapes. Moreover, the research implemented a method for biomaterial sample preparation. This method is aimed at obtaining the possibility of using a biomaterial sample as a natural indicator to reveal the aeolian and dust aerosol substance intake. As a result, there is an urgent need to involve steps in biogeochemical data statistical processing that allows one qualitatively differentiate the effects of chemical elements concentration via root nutrition and dust accumulation on the leaves. The aim. Statistical assessment of content variability and relationships of chemical elements in aspen leaves in the zone of anthropogenic influence of transport roads crossing the localization areas of buried iron ore deposits of the Bakcharsko-Kolpashevo ore district, Kolpashevo-Turukhan mineragenic zone. Qualitative biogeochemical identification of biomaterial enrichment through root and dust in areas of anomalous concentration of chemical elements using data on accumulation of rare earth elements. Objects. Soil, leaves of common aspen (Populus tremula L., 1753). Methods. Regional biogeochemical and lithochemical sampling was carried out in three profiles along local roads with asphalt and unpaved surfaces at the entrances to settlements. The sampling points common for the methods were shifted off the roads at a distance of at least 20 m to undisturbed landscapes. After sample preparation, the concentration of 28 chemical elements in the samples was determined by instrumental neutron activation analysis. The interpretation of geochemical data was based on the results of multicomponent statistical analysis. Results. The studied territories along the lines of regional research are characterized by the background biogeochemical and lithochemical values. The revealed biogeochemical anomaly is caused by a dust halo that accompanies the unpaved road. The rare earth elements levels show the influence of fine dust-aerosol and aeolian material intake.

THE FURNITURE INDUSTRY IN IRAQ BETWEEN IMPORT AND CONSUMPTION - BY APPLICATION TO THE CITY OF FALLUJA

Industry is the backbone of any civil entity that aims to be economically stable and stand in the ranks of developed nations, and the researcher in industrial geography is usually interested in observing the most important facts about the industry in question in order to develop and elevate it. In this research, it has dealt with one of the types of industrial products which is Furniture that is indispensable by humans. Therefore, the furniture industry is one of the important industrial products globally, and the research presented its reality in Iraq through application to the city of Fallujah, one of the cities of Anbar Governorate, which occupies a central location in the province and the state. Fallujah includes 21 residential neighborhoods with about 112 factories or establishments working in the manufacture of metal furniture type, accounting for 54% of the total number of factories, which is the highest percentage of the number of factories for manufacturing wooden furniture in the city, which numbered about 51 factories only. The reasons for the geographical distribution referred to in the research maps by applying quantitative methods suitable for industrial geography; Where the indicators of industrial settlement were used, and the percentages and the arithmetic average were extracted for the raw numbers for factories, the number of workers, workers' wages, and industry requirements in order to determine the relative importance of that. Through the quantitative presentation of the furniture industry in Fallujah and linking this to the factors of industrial settlement, the researcher has concluded that the city of Fallujah is a city in which the furniture industry is settled. Because it is a primarily residential city that attracts internal migration in a large way, and it also has strong settlement factors such as the network of transport roads surrounding it and the centrality of the city in the country and that it is an area that attracts investment capital for the private sector in that industry in particular. The research has found that there is a close relationship between what Iraq faced periods of wars and economic blockade, and different governments pursue different approaches and the fragility of the Iraqi economy, which led to the adoption of the principle of import from abroad, as the national product is very fragile and of poor and noncompetitive raw materials, given that the climate in the country did not allow the cultivation of trees that have woods yield The research recommendations highlighted the necessity of activating interest in the national product, rationing imports from abroad, and cultivating modern trees with techniques that preserve the quality of wood in order to develop the furniture industry in Iraq.

Research of a Fiber Sensor Based on Fiber Bragg Grating for Road Surface Monitoring

Road infrastructure is a key public asset because it benefits the social and economic development of any country. It plays an important role in the development of the industrial complex and the production sector, and the surfaces of transport roads should be of high quality and have a long service life. Road infrastructure, like all infrastructure, requires preservation, maintenance and repair. There are special requirements for roadways that must be observed during construction or repair. The uncertainty of the composition, temperature sensitivity and viscoelastic characteristics of road materials make the structural analysis of pavement very difficult compared to other civil structures, such as bridges, tunnels and buildings. For this reason, the question of how to improve fiber sensors based on fiber Bragg grating (FBG) arose. The novelty of this study is to modernize fiber sensors based on FBG so that they display deformation, stress and displacement, temperature and other parameters with much greater accuracy, which would provide a reliable scientific basis for modifying the theory, as well as the use of a fiber sensor based on FBG for simultaneous measurement of deformation and temperature when monitoring the road surface. This article is devoted to a detailed study of the use of fiber-optic sensors (FOS) based on fiber Bragg grating for road surface monitoring. Such a fiber sensor, consisting of a fiber Bragg grating and a pair of grids, can offer the possibility of simultaneous measurement of deformation and temperature for monitoring the pavement. Temperature and deformation measurements were carried out by installing a sensor on the surface of a made asphalt sample. The built-in fiber sensor based on FBG provides important information about how the pavement structure can withstand the load and subsidence of soil and implement road safety and stability measures in a timely manner to evaluate and predict the service life of the pavement. The results of the study showed that the synchronicity, repeatability and linearity of the characteristics of the fiber sensor are excellent. The difference between the experimental and theoretical results was about 7%. Thus, based on the results of the obtained data, the fiber sensor on the FBG can be used for monitoring and designing road surfaces and in general transport infrastructure.

ROADS AND RAILWAYS

Africa Research Bulletin: Economic, Financial and Technical SeriesVolume 60, Issue 3 p. 24244A-24245C Communications and Transport ROADS AND RAILWAYS First published: 05 May 2023 https://doi.org/10.1111/j.1467-6346.2023.11070.xRead the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL No abstract is available for this article. Volume60, Issue3May 2023Pages 24244A-24245C RelatedInformation

ROADS AND RAILWAYS: Botswana – Zambia

Africa Research Bulletin: Economic, Financial and Technical SeriesVolume 60, Issue 2 p. 24206A-24207A Communications and Transport ROADS AND RAILWAYS: Botswana – Zambia First published: 05 April 2023 https://doi.org/10.1111/j.1467-6346.2023.11027.xRead the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL No abstract is available for this article. Volume60, Issue2April 2023Pages 24206A-24207A RelatedInformation

The spatial effects of regional transportation roads and their role in activating the development potential using (GIS) techniques: Al Zubair district a case study

The research, through a scientific study of the Al-Zubair district, tried to focus on the importance of land transport roads in general and highway transport lines in particular, and their role in creating an integrated development process in the spatial domains that they penetrate. The developmental role of this important vital sector (main road networks) in reviving and activating the development potential characterizes the study area with the spatial extension of those roads in the establishment of urban communities and planning for the development of various human activities. The research focused on analysing the developmental relationship of the main transportation roads and their impact on the Al-Zubair district using the analytical method by relying on geographic information systems (GIS) techniques and using standard methods, including the inflexion factor method and the nearest neighbour in determining the effectiveness of regional roads, and the use of the questionnaire and the adoption of planning methods to show the efficiency of the roads, including the method (the inflexion coefficient). The research reached a set of results that prove the existence of a developmental interrelationship between the regional transport routes and the areas of spatial activities of the population in the study area.

Assessment of Safe Access to Pedestrian Infrastructure Facilities in the City of Almaty, Kazakhstan

Currently, in all large and small cities in Kazakhstan, residential and public buildings are being actively built. It should be noted that the quantitative indicators of the construction of residential facilities prevail. The method applied to building residential facilities at the point and quarter increases the population density in urban areas. Increasing the number of residents requires assessing the levels of comfort for pedestrians at different speeds, the safety of sidewalks, and ensuring the accessibility of infrastructure facilities to people. The purpose of the study is to evaluate the quality of comfortable and safe conditions of pedestrian roads as a part of a district of Almaty. The assessment is based on the study of the presence and quality of elements and objects in the structures of transport roads and pedestrian sidewalks, and the determining level of pedestrian comfort is also applied (PCL). As a result of the study, the most problematic streets, the quality of pedestrian accessibility of extensive infrastructure facilities in each residential sector, and the main shortcomings and proposals for their elimination will be identified. The data obtained because of the study can be used in reconstruction, and urban area spatial planning concepts, allowing people to walk to most daily services and institutions, creating maximum opportunities to walk, reducing dependence on road transport, and contributing to the daily life of the community.

ROADS AND RAILWAYS

Africa Research Bulletin: Economic, Financial and Technical SeriesVolume 59, Issue 8 p. 23994A-23994C Communications and Transport ROADS AND RAILWAYS First published: 27 September 2022 https://doi.org/10.1111/j.1467-6346.2022.10760.xRead the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat No abstract is available for this article. Volume59, Issue8October 2022Pages 23994A-23994C RelatedInformation

ROADS AND RAILWAYS

Africa Research Bulletin: Economic, Financial and Technical SeriesVolume 59, Issue 7 p. 23955C-23956C Communications and Transport ROADS AND RAILWAYS First published: 05 September 2022 https://doi.org/10.1111/j.1467-6346.2022.10715.xRead the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat No abstract is available for this article. Volume59, Issue7September 2022Pages 23955C-23956C RelatedInformation

ROADS AND RAILWAYS

Africa Research Bulletin: Economic, Financial and Technical SeriesVolume 59, Issue 5 p. 23885B-23886A Communications and Transport ROADS AND RAILWAYS First published: 02 July 2022 https://doi.org/10.1111/j.1467-6346.2022.10630.xRead the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat No abstract is available for this article. Volume59, Issue5July 2022Pages 23885B-23886A RelatedInformation

МОДЕЛЬ ПРОГНОЗИРОВАНИЯ ТРАНСПОРТНОГО ПОТОКА НА ОСНОВЕ НЕЙРОННЫХ СЕТЕЙ ДЛЯ ПРЕДСКАЗАНИЯ ТРАФИКА НА ДОРОГАХ

In connection with the industrialization of modern society, the growth of the transport systemsof our country, an increase in certain necessary for the development of the needs of the citizensof our country, the number of vehicles of various types continues to increase every year veryfast, causing huge traffic jams on transport roads, especially in large cities and megacities. Thus,forecasting traffic flows is an important and necessary component of optimal traffic control inmodern conditions of transport network development. As a solution to this problem, this articleaims to analyze and describe the application of artificial intelligence methods, in particular neuralnetworks, which represent a modern approach to modeling in complex and nonlinear situationsthat arise when predicting a traffic flow model. The shown accuracy method is based on the developmentof a neural network to predict the daily traffic flow. The expected traffic flow is then comparedwith the actual dataset recorded on the road section and provided by the infrastructuremanager. In fact, neural networks are able to learn from past situations and predict future situationson the transport network. In this study, various neural network structures were examined, and the simulation results showed that the best predictions were obtained using the multilayerperceptron architecture, which has a good generalization system with a root mean square error of0.00927 with the current set of vehicles. The first part of the article is devoted to defining variousconcepts related to the current research area, including a review of the literature on traffic predictionand neural networks. The second part is devoted to describing the problem of traffic congestionusing forecasting problems and presenting the proposed solution method with an emphasis onartificial neural networks as a means of forecasting demand and its various structures. Then, numericalexperiments are illustrated by analyzing the forecast results after the formation and testingof various neural network architectures.

Analysis of the working environment conditions in the function of water drainage into massive at the quarry Veliki Krivelj

The conditions of the open pit drainage are usually very complex and, as a rule, insufficiently researched. When it comes to the exploitation of technical stone, especially limestone, the working environment is characterized by the crack porosity, and the present system of cracks and faults, apart from being in a complex relationship with each other, is characterized by greater or lesser water permeability as a function of the size of crack openings, type of material with which they are filled and degree of filling. As a result of exploitation works, the seismic impact that occurs as a result of blasting at the open pit, change in stress conditions due to the excavation and filling of the openings of existing cracks by the formation of transport roads and working plateaus at the open pit itself and during exploitation, the working environment conditions are changed, affecting the selection and functioning of drainage system of the open pit. Due to a number of affecting factors and their changes during exploitation, the selection and achievement of high efficiency of the open pit drainage system is a complex task. When it comes to testing the possibility of applying the water drainage from the open pit into surrounding rock massif, in order to achieve the expected high efficiency and safety of the drainage system, the working environment characteristics must be well known. This paper presents an analysis of application the conditions of the Kriveljski Kamen open pit drainage system by mine water drainage into massif [1]. This type of system was analyzed as a part of development the limestone exploitation project at this open pit with the basic idea of creating a reliable and economical system for protecting the open pit from water in the conditions of extremely high rainfall.

Roads and Railways

Africa Research Bulletin: Economic, Financial and Technical SeriesVolume 58, Issue 10 p. 23632A-23632A Communications and Transport Roads and Railways First published: 01 December 2021 https://doi.org/10.1111/j.1467-6346.2021.10307.xRead the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat No abstract is available for this article. Volume58, Issue10December 2021Pages 23632A-23632A RelatedInformation

ASSESSMENT OF THE IMPACT OF VEHICLE EMISSIONS ON THE ATMOSPHERE OF THE CITY OF VORONEZH AND THEIR MINIMIZATION

The paper considers the emissions of pollutants from road transport, in the total air pollution they make up 70 % on the example of a particular metropolis. The highway is considered as a linear source consisting of single point sources of pollution. Special attention is paid to suspended fine particles in the solid phase. It is determined that when assessing the level of environmental pollution, it is important to take into account not only the total number of vehicles, but also the ratio of cars of different categories, since they, having different emission factors, supply unequal volumes (mass) exhaust gas components. The variability of the traffic flow density on the streets of six administrative districts of Voronezh and the complexity of zoning the city territory because of three-year monitoring were established. It is proposed to place accounting points on streets that differ in their status in the general transport network of the city in order to obtain reliable data during the monitoring period [11]. The simulation of diffusion movements and migrations of solid-phase air pollutants of roadside territories is carried out. The model of diffusive displacements and migrations of heavy metals is considered in relation only to passive contaminants. The choice is implemented and the method of studying the level of dustiness of motor transport roads is recommended, which allows fixing dust particles from 0.1 microns to 250 microns in the air. An algorithm of an improved system for monitoring the content of fine dust in the atmosphere of a residential zone is proposed. [16]. To minimize the emission of suspended substances, a two-stage emission purification system consisting of a gas-liquid absorber and a catalytic adsorber is proposed.

Numerical modeling of transport roads in open pit mines

Transport of overburden and mineral raw materials in surface mining is one of the most complex and costly processes today. Good transport roads are essential for successful transportation by trucks in open pit mines. Poor design, and maintenance of the roads has the greatest impact on the high transport costs and possible risks in terms of security. Numerical modeling was performed to analyze the effects of the properties of the built-in materials used in the construction of roads, the thickness of the layers and the interaction of tires with the road surface. The distribution of stress and strain determined in the construction of a road depends on the characteristics of the road and the structure and mass of the truck. For this reason, numerical modeling and computer simulation is considered a very suitable method in the design of roads, because in a short period of time and at a lower cost calculations for the construction of a large number of models can be implemented and the best model available will be chosen. The most favorable construction will be considered to be the one that will, at minimum construction costs and with low costs of maintenance, enable the efficient use of transport equipment for a longer period of exploitation.