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To address road accident losses, there is a need to prioritize safety factors, especially in high-risk locations on the road network, toward assuring a sustainable transport system. This paper proposes an approach for quantitative risk assessments of safety factors in hazardous road locations and involves the integration of the Fuzzy logic model, the Analytic Hierarchy Process (FAHP) and the Technique for Order of Preference by Similarity to Ideal Solution (TOPSIS). This new innovative method offers a way to prioritize and select safety factors associated with hazardous locations using a hierarchical structure. To demonstrate the applicability of this method, a case study was conducted in Egypt. The assessment process involved active participation by professionals through multiple expert meetings. This collaborative approach ensures that the assessment incorporates valuable real-world knowledge and experiences. It analyzed road safety hazardous conditions across various sections, including intersections, non-intersection sections, narrow bridge sections, and curve sections. The application of FAHP-TOPSIS enables the determination of weights for safety factors within each section, facilitating the evaluation of safety indices between them and ranking the safety hazard sections. The achieved analysis revealed that the hazard safety factor index is comparatively higher in curved sections compared to other types of sections. Light utility poles and road barriers significantly affected the hazard index. By utilizing this approach, governments may make informed decisions regarding the allocation of resources and the implementation of safety measures at hazardous road locations. [ABSTRACT FROM AUTHOR]

The relevance of the study is conditioned by the urgent need for the practical derivation of clear criteria for assessing the degree of influence of certain materials used in road construction on the state of the roadside environment directly during such works, including the overall environmental situation in the area. In this context, the main purpose of this study is to conduct an experimental investigation to determine the physical and mechanical properties and durability of some building materials used during road repair, to perform a comparative analysis of the results obtained to determine their optimal use in terms of influencing the state of the roadside environment during the repair of a highway section. The leading method in this study is a combination of a systematic analysis of the influence of various materials on the state of the roadside environment during the repair with experimental studies. The results obtained indicate the different influence of materials used in road repair works on the state of the roadside environment and the need to choose their optimal combination in the future when repairing the roadway. The results obtained and the practical conclusions formed on their basis will be of significant importance directly for the employees of the road repair services, who, by their occupation, solve the issues of using specific building materials when repairing and eliminating damage to the roadway, as well as for researchers who solve theoretical problems of choosing specific materials for carrying out repair works, from the standpoint of assessing their impact on the roadside environment. [ABSTRACT FROM AUTHOR]

In this study, a new combined framework based on the methods of Multiple-criteria decision-making and mathematical planning was provided in order to select the Road Sections (RS) to carry out Maintenance and Repair Operation (MRO) in order to maximise the reliability of using roads. At first, using Multiple-criteria decision-making of the Best-Worst Method (BWM) and Grey Relational Analysis (GRA) methods, the weight of each RS for each MRO was defined, which can be considered as the amount of improvement in every section for the implementation of each MRO. Then, using a mathematical model, the optimal decision was specified to implement MRO for each RS. According to the calculation results, the fracture level on the road with the weight of 0.159 is the most important criterion and the lack of light with the weight of 0.074 is the least important criterion for selecting the type of MRO. Also, using the results of the mathematical model creates a confidence level of more than 93 percent in using all the section of road, which shows 14.8 percent improvement compared to the current situation. Also, the robust model results have also shown that as the level of uncertainty level rises along with the increase in the robust value, the road reliability decreases. [ABSTRACT FROM AUTHOR]

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The conventional gray predication model GM (1, 1) cannot accurately analyze the dynamic traffic index information of complex and scattered road sections because it may cause relatively large error and performs not well in stability. In order to solve this problem, a dynamic traffic safety grade evaluation model for road sections based on gray fixed weight clustering is designed. In this method, In this method, the gray clustering evaluation method is adopted for gray clustering to complex and scattered traffic safety grade evaluation indexes, and the gray fixed weight clustering method is adopted to weight each clustering index in advance; the clustering weight of each index is set by a fuzzy consistent matrix, on which the fixed weight coefficient of the index is calculated and the clustering vector is constructed; the cluster coefficients and cluster vectors are combined to obtain the clustering indexes of traffic safety evaluation; then a BP neural network dynamic traffic safety grade evaluation model for road sections is constructed according to the indexes, so as to accurately evaluate the dynamic traffic safety grade of road sections. The experiment results show that the designed model method can effectively evaluate the dynamic traffic safety grade of 31 road sections in areas with a high probability of traffic congestion with small evaluation error and high stability, so it meets the design requirements. [ABSTRACT FROM AUTHOR]

Copyright of Boletín del Museo Chileno de Arte Precolombino is the property of Museo Chileno de Arte Precolombino and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

This study aims to develop a road safety index that combines selected road environmental characteristics in Malaysia. Firstly, 14 indicators that generally portray the Malaysian road environments were selected. Then, the final list of specific indicators for each road network was developed. The indicators were derived based on the specific criteria such as the objectives, method of measurement, quality, and expected outcomes of the indicators that may improve the overall road safety of the Malaysian trunk roads. The Malaysian Federal Road 12 was selected as the study area to assess the applicability of the theory. By employing the principal component analysis, four components were obtained and from the statistical weightage of the indicator in each component, the composite indexes were calculated. The results showed that the sections with low number of reported crashes were not necessarily safe for road users. Instead, poor road environment conditions may be highly hazardous to road users. The presence of heavy vehicles and motorcycles was found to be the main risk factor of crash occurrences on this road. Overall, the crash data may be supplemented with another proactive method in order to get a broader picture of the poor road sections. [ABSTRACT FROM PUBLISHER]

The paper describes a system for measuring road section parameters in a way that the results can be used in driving dynamics simulations. The system consists of sensorics and a data acquisition subsystem supported by software for generating 3D road section geometrical models. These models are then used as driving surfaces in dynamics simulation packages to investigate and analyse different aspects of road design and its role in traffic accident analysis, reconstruction and prevention. The paper presents examples of measurements, road section modelling and simulation results, obtained by means of different software simulation tools. It discusses possibilities of further development and improvement of the system. [ABSTRACT FROM AUTHOR]

Traffic management is a significantly difficult and demanding task. It is necessary to know the main parameters of road networks in order to adequately meet traffic management requirements. Through this paper, an integrated fuzzy model for ranking road sections based on four inputs and four outputs was developed. The goal was to determine the safety degree of the observed road sections by the methodology developed. The greatest contribution of the paper is reflected in the development of the improved fuzzy step-wise weight assessment ratio analysis (IMF SWARA) method and integration with the fuzzy measurement alternatives and ranking according to the compromise solution (fuzzy MARCOS) method. First, the data envelopment analysis (DEA) model was applied, showing that three road sections have a high traffic risk. After that, IMF SWARA was applied to determine the values of the weight coefficients of the criteria, and the fuzzy MARCOS method was used for the final ranking of the sections. The obtained results were verified through a three-phase sensitivity analysis with an emphasis on forming 40 new scenarios in which input values were simulated. The stability of the model was proven in all phases of sensitivity analysis. [ABSTRACT FROM AUTHOR]

The management of different industrial by-products, such as recycled aggregates from construction and demolition waste and alumina by-products, as well as the reduction of landfill deposits by incorporating these products in a second life cycle, were the focus of this work. The aim of this study was to demonstrate the technical viability of using these waste and by-product as a material for road pavement base layers. For this purpose, a real-scale application was carried out, and the behavior of three types of materials, applied on a section of an experimental road under real vehicle traffic conditions, was studied and compared. Three materials were used in these sections applied in the road sub-bases. First, a control material composed of a type of artificial gravel was used to be compared with the rest of materials; the second material was composed of recycled aggregates, and the third was composed of a mix of recycled aggregates and alumina waste. The results concluded that the effectiveness of the sections built using recycled aggregates and alumina waste was very positive and similar those constructed using natural aggregates. [ABSTRACT FROM AUTHOR]