Autonomous vehicles are in the main focus for automotive companies and urban traffic engineers as well. As their penetration rate in traffic becomes more and more pronounced due to improvement in sensor technologies and the corresponding infrastructure, new methods for autonomous vehicle controls become a necessity. For instance, autonomous vehicles can improve the performance of urban traffic and prevent the formation of congestions with the usage of Vehicle-to-Vehicle (V2V) and Vehicle-to-Infrastructure (V2I) communication based control methods. One of the key area for improvement is centralized intersection control for autonomous vehicles, by which traveling times can be reduced and efficiency of traffic flow can be improved, while safety of passengers can be guaranteed through constraints built in the centralized design. The paper presents the analysis of a Model Predictive Control (MPC) method for the coordination of autonomous vehicles at intersections by comparing it with an offline constraint optimization considering time and energy optimal intervention of vehicles. The analysis has been evaluated in high-fidelity simulation environment CarSim, where the speed trajectories, traveling times and energy consumptions have been compared for the different methods. The simulations show that the proposed time-optimal MPC intersection control method results in similar traveling times of that given by the time-optimal offline constraint optimization, while the energy optimal optimization re-quires significantly more time for the autonomous vehicle to achieve. Due to the possibility of a congestion forming in the latter case, the proposed centralized MPC method is more applicable in real traffic scenarios.
{"title":"Analysis of Model Predictive Intersection Control for Autonomous Vehicles","authors":"Zsófia Farkas, András Mihály, P. Gáspár","doi":"10.3311/pptr.22082","DOIUrl":"https://doi.org/10.3311/pptr.22082","url":null,"abstract":"Autonomous vehicles are in the main focus for automotive companies and urban traffic engineers as well. As their penetration rate in traffic becomes more and more pronounced due to improvement in sensor technologies and the corresponding infrastructure, new methods for autonomous vehicle controls become a necessity. For instance, autonomous vehicles can improve the performance of urban traffic and prevent the formation of congestions with the usage of Vehicle-to-Vehicle (V2V) and Vehicle-to-Infrastructure (V2I) communication based control methods. One of the key area for improvement is centralized intersection control for autonomous vehicles, by which traveling times can be reduced and efficiency of traffic flow can be improved, while safety of passengers can be guaranteed through constraints built in the centralized design. The paper presents the analysis of a Model Predictive Control (MPC) method for the coordination of autonomous vehicles at intersections by comparing it with an offline constraint optimization considering time and energy optimal intervention of vehicles. The analysis has been evaluated in high-fidelity simulation environment CarSim, where the speed trajectories, traveling times and energy consumptions have been compared for the different methods. The simulations show that the proposed time-optimal MPC intersection control method results in similar traveling times of that given by the time-optimal offline constraint optimization, while the energy optimal optimization re-quires significantly more time for the autonomous vehicle to achieve. Due to the possibility of a congestion forming in the latter case, the proposed centralized MPC method is more applicable in real traffic scenarios.","PeriodicalId":39536,"journal":{"name":"Periodica Polytechnica Transportation Engineering","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47219258","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
It is difficult to determine the ideal way for collecting selective waste since calculations must be made taking into account a variety of collection vehicles, containers, city regions, and verifying vehicles. Additionally, we need to keep in mind that acquiring some statistical information on container filling is crucial for organizing the gathering process. The majority of the vehicles used for the gathering operate on fossil fuels like gasoline, which releases carcinogens into the atmosphere. Since the engine drives a hydraulic pump that generates power to lift the container when it is being emptied, the exhaust emissions are not solely coming from the vehicles when they reach the container. As a result, it is crucial to describe the entire gathering process. On the one hand, we want to safeguard the environment by utilizing selective gathering, but on the other hand, there are gathering vehicles that emit carcinogenic exhaust gas. In order to reduce unneeded pollution from the gathering vehicle, we aim to identify the best solution in this paper for choosing the appropriate selective material collection method.
{"title":"Potential Benefits of Mixed Waste Collection Methods","authors":"A. Titrik","doi":"10.3311/pptr.21851","DOIUrl":"https://doi.org/10.3311/pptr.21851","url":null,"abstract":"It is difficult to determine the ideal way for collecting selective waste since calculations must be made taking into account a variety of collection vehicles, containers, city regions, and verifying vehicles. Additionally, we need to keep in mind that acquiring some statistical information on container filling is crucial for organizing the gathering process. The majority of the vehicles used for the gathering operate on fossil fuels like gasoline, which releases carcinogens into the atmosphere. Since the engine drives a hydraulic pump that generates power to lift the container when it is being emptied, the exhaust emissions are not solely coming from the vehicles when they reach the container. As a result, it is crucial to describe the entire gathering process. On the one hand, we want to safeguard the environment by utilizing selective gathering, but on the other hand, there are gathering vehicles that emit carcinogenic exhaust gas. In order to reduce unneeded pollution from the gathering vehicle, we aim to identify the best solution in this paper for choosing the appropriate selective material collection method.","PeriodicalId":39536,"journal":{"name":"Periodica Polytechnica Transportation Engineering","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48391536","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The recycling of reclaimed asphalt pavement is of significant economic and environmental benefits. In this case, however, the satisfactory performance of the final product needs scientific planning of the mixture and thorough quality control. Before its use, a number of tests must be performed to verify that the binder meets the relevant requirements and can be used in asphalt mixtures. The binder characteristics in the reclaimed asphalt pavement and the expected properties of the binder blend in the new asphalt mixture must be known. For its prediction and calculation, a European standard offers the calculation of the penetration or softening point of the binder blend in the mixture with reclaimed asphalt content. However, in some countries, the determination of paving grade bitumen types (categories) is based not on dynamic viscosity measured with DSR instrument, so other validated test and calculation methods are in force. A viscosity-based method has not yet been validated for paving grade bitumens standardized on a penetration basis, although this method is more advantageous in many aspects when monitoring daily production processes; it is much shorter and requires less material than measuring softening point or penetration. The article deals with the measurement of the dynamic viscosity of bitumen blends of asphalt mixtures made using reclaimed asphalts, determined with a dynamic shear rheometer at different frequencies (0.1–10.0 Hz sweep). Furthermore, the relationships between the different composition ratios of national paving grade bitumens classified on the bases of penetration level and bitumens from reclaimed asphalt pavement are examined.
{"title":"Dynamic Viscosity Prediction of Blends of Paving Grade Bitumen with Reclaimed Bitumen","authors":"S. Rosta, L. Gáspár","doi":"10.3311/pptr.21926","DOIUrl":"https://doi.org/10.3311/pptr.21926","url":null,"abstract":"The recycling of reclaimed asphalt pavement is of significant economic and environmental benefits. In this case, however, the satisfactory performance of the final product needs scientific planning of the mixture and thorough quality control. Before its use, a number of tests must be performed to verify that the binder meets the relevant requirements and can be used in asphalt mixtures. The binder characteristics in the reclaimed asphalt pavement and the expected properties of the binder blend in the new asphalt mixture must be known. For its prediction and calculation, a European standard offers the calculation of the penetration or softening point of the binder blend in the mixture with reclaimed asphalt content. However, in some countries, the determination of paving grade bitumen types (categories) is based not on dynamic viscosity measured with DSR instrument, so other validated test and calculation methods are in force. A viscosity-based method has not yet been validated for paving grade bitumens standardized on a penetration basis, although this method is more advantageous in many aspects when monitoring daily production processes; it is much shorter and requires less material than measuring softening point or penetration. The article deals with the measurement of the dynamic viscosity of bitumen blends of asphalt mixtures made using reclaimed asphalts, determined with a dynamic shear rheometer at different frequencies (0.1–10.0 Hz sweep). Furthermore, the relationships between the different composition ratios of national paving grade bitumens classified on the bases of penetration level and bitumens from reclaimed asphalt pavement are examined.","PeriodicalId":39536,"journal":{"name":"Periodica Polytechnica Transportation Engineering","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48700201","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Arkadiusz J. Derkacz, A. Dudziak, O. Stopka, Mária Stopková
The main purpose of the research is to identify differences in the factors determining changes in the return on capital (ROE) of transport and warehouse enterprises in individual voivodeships in Poland. The research used the ROE decomposition method which was justified by mathematical aspects. It paid attention on the decomposition of relative differences shaping the changes in this specific indicator. The substantive basis is the modified 5-factor Du Pont model. This method allowed for analysing relative changes in three decision areas. These areas encompass operational, financial, and tax management. The findings confirmed that the differences in individual voivodeships compared to the entire section H in Poland result mainly from financial management. However, the examined differentiation was not dependent on tax management. The presented research results can represent the basis for the strategy of corporate management in section H in positioning against competitive enterprises in Poland. The research also allows for a macroeconomic analysis of the phenomena occurring in the transport as well as warehousing sector, especially in terms of changes in their profitability.
{"title":"Profitability Determinants of Transport Service and Warehouse Enterprises","authors":"Arkadiusz J. Derkacz, A. Dudziak, O. Stopka, Mária Stopková","doi":"10.3311/pptr.21402","DOIUrl":"https://doi.org/10.3311/pptr.21402","url":null,"abstract":"The main purpose of the research is to identify differences in the factors determining changes in the return on capital (ROE) of transport and warehouse enterprises in individual voivodeships in Poland. The research used the ROE decomposition method which was justified by mathematical aspects. It paid attention on the decomposition of relative differences shaping the changes in this specific indicator. The substantive basis is the modified 5-factor Du Pont model. This method allowed for analysing relative changes in three decision areas. These areas encompass operational, financial, and tax management. The findings confirmed that the differences in individual voivodeships compared to the entire section H in Poland result mainly from financial management. However, the examined differentiation was not dependent on tax management. The presented research results can represent the basis for the strategy of corporate management in section H in positioning against competitive enterprises in Poland. The research also allows for a macroeconomic analysis of the phenomena occurring in the transport as well as warehousing sector, especially in terms of changes in their profitability.","PeriodicalId":39536,"journal":{"name":"Periodica Polytechnica Transportation Engineering","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42653877","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
An increasing number of vehicles are equipped with cameras. As perception sensors, they scan the surrounding area and supply the Advanced Driver Assistance Systems (ADAS) for building up an environmental model through the use of computer vision techniques. While they perform well under good weather conditions their efficiency is reduced by adverse environmental influences such as rain, fog and occlusion through dirt. As a consequence, the vision based ADAS obtains poor quality information, and the model also becomes faulty. This paper deals with methods to estimate information quality of cameras in order to warn the assistance system of possible wrong working conditions. In particular, situations of contamination or occlusion of the windshield or camera lens, as well as foggy weather are taken into account in this paper. In the issue of occlusion total, fractional and transparent effectuations have to be recognized and distinguished. Therefore, this paper proposes an approach based on edge analysis of consecutive frames and presents initial experimental results of the implementation. In the field of Fog Detection a method based on the Logarithmic Image Processing Model is described and the results are shown.
{"title":"Calibration Measurements and Computational Models of Sensors Used in Autonomous Vehicles","authors":"Csaba Hajdu, István Lakatos","doi":"10.3311/pptr.18453","DOIUrl":"https://doi.org/10.3311/pptr.18453","url":null,"abstract":"An increasing number of vehicles are equipped with cameras. As perception sensors, they scan the surrounding area and supply the Advanced Driver Assistance Systems (ADAS) for building up an environmental model through the use of computer vision techniques. While they perform well under good weather conditions their efficiency is reduced by adverse environmental influences such as rain, fog and occlusion through dirt. As a consequence, the vision based ADAS obtains poor quality information, and the model also becomes faulty. This paper deals with methods to estimate information quality of cameras in order to warn the assistance system of possible wrong working conditions. In particular, situations of contamination or occlusion of the windshield or camera lens, as well as foggy weather are taken into account in this paper. In the issue of occlusion total, fractional and transparent effectuations have to be recognized and distinguished. Therefore, this paper proposes an approach based on edge analysis of consecutive frames and presents initial experimental results of the implementation. In the field of Fog Detection a method based on the Logarithmic Image Processing Model is described and the results are shown.","PeriodicalId":39536,"journal":{"name":"Periodica Polytechnica Transportation Engineering","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42082519","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Transportation development is one of the parameters indicating the development of any country. Due to improper maintenance of infrastructure, non-eco-friendly designs and practices etc. have led to congestion, accidents and environmental depletion. These problems can be addressed by developing a structured transportation system integrated with sustainability and safety. The aim of this study is to analyze the existing facilities in the study area and to suggest integration of non-motorised transport and public transport through questionnaire survey. The bicycle compatibility index is calculated to find the bicycle level of service of the study area. The bus stop coverage analysis was done by calculating the ideal stop accessibility index, actual stop accessibility index and stop coverage ratio index. From bicycle compatibility index, it can be concluded that the compatibity of the surveyed region was moderately high for bicyclists. Based on bus-stop coverage analysis, Kalyan nagar bus stop is said to have good accessibility whereas ITI layout has poor accessibility.
{"title":"Analysis of Non-motorised Transport and Public Transport Facilities Using Bicycle Compatibility Index and Stop Coverage Ratio, in Vijayanagar, Bengaluru","authors":"Lingaraju Megha, S. Srikanth","doi":"10.3311/pptr.19195","DOIUrl":"https://doi.org/10.3311/pptr.19195","url":null,"abstract":"Transportation development is one of the parameters indicating the development of any country. Due to improper maintenance of infrastructure, non-eco-friendly designs and practices etc. have led to congestion, accidents and environmental depletion. These problems can be addressed by developing a structured transportation system integrated with sustainability and safety. The aim of this study is to analyze the existing facilities in the study area and to suggest integration of non-motorised transport and public transport through questionnaire survey. The bicycle compatibility index is calculated to find the bicycle level of service of the study area. The bus stop coverage analysis was done by calculating the ideal stop accessibility index, actual stop accessibility index and stop coverage ratio index. From bicycle compatibility index, it can be concluded that the compatibity of the surveyed region was moderately high for bicyclists. Based on bus-stop coverage analysis, Kalyan nagar bus stop is said to have good accessibility whereas ITI layout has poor accessibility.","PeriodicalId":39536,"journal":{"name":"Periodica Polytechnica Transportation Engineering","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44937014","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Maintaining and enhancing aviation safety at all times is an essential factor at various airports around the world. It is not enough to keep it at that level, as we also see from history that the volume of air traffic doubles almost every 15 years. The number of aircraft in traffic is constantly increasing, and airport infrastructure needs to be developed. Consequently, the challenges for aviation are also greater. Electronic Terrain- and Obstacle Data Collection (eTOD) at airports and their surroundings are an essential procedure for aviation safety that aims to organize databases of potentially dangerous flight obstacles. The process is based on passive optical aerial remote sensing from a fixed-wing aircraft. With the help of point cloud and geoinformatics software created during the processing of in-flight recordings and additional data, strictly defined terrain- and obstacle data can be organized into databases, the format of which is regulated by international standards and documents, according to which the obstacle database can be used internationally. These data sets are needed not only because they are required by law, but also because they form the basis for the design of various aircraft procedures and make a major contribution to safe aviation.
{"title":"Combined Use of Aerial Remote Sensing and Terrestrial Survey in ICAO eTOD's Electronic Terrain- and Obstacle Data Collection","authors":"Zsolt Bagdi, G. Bakó, Z. Molnár","doi":"10.3311/pptr.20851","DOIUrl":"https://doi.org/10.3311/pptr.20851","url":null,"abstract":"Maintaining and enhancing aviation safety at all times is an essential factor at various airports around the world. It is not enough to keep it at that level, as we also see from history that the volume of air traffic doubles almost every 15 years. The number of aircraft in traffic is constantly increasing, and airport infrastructure needs to be developed. Consequently, the challenges for aviation are also greater. Electronic Terrain- and Obstacle Data Collection (eTOD) at airports and their surroundings are an essential procedure for aviation safety that aims to organize databases of potentially dangerous flight obstacles. The process is based on passive optical aerial remote sensing from a fixed-wing aircraft. With the help of point cloud and geoinformatics software created during the processing of in-flight recordings and additional data, strictly defined terrain- and obstacle data can be organized into databases, the format of which is regulated by international standards and documents, according to which the obstacle database can be used internationally. These data sets are needed not only because they are required by law, but also because they form the basis for the design of various aircraft procedures and make a major contribution to safe aviation.","PeriodicalId":39536,"journal":{"name":"Periodica Polytechnica Transportation Engineering","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46991940","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The present article presents the results of tribological investigations performed on an off-the-shelf engine lubricant containing nanoadditives of multilayered graphene and C60 fullerene alternately. As anthropogenic CO2 is believed to be highly responsible for global climate change, its emission is regulated in many countries. CO2 emissions can be significantly decreased by improving the efficiency i.e. decreasing the losses in an engine. Hence reducing frictional losses was the ultimate scope of the investigations presented in this article. The experiments were carried out on an oscillating tribometer at the Department of Internal Combustion Engines at Széchenyi István University. The experiments showed that multilayered graphene in engine lubricant did not modify the friction coefficient inevitably (-1% to +4%). Fullerene nanoparticles, however, reduced the friction by 4–8%. The optimal fullerene doping quantity that resulted in the lowest friction showed to be at around 0.14 wt%.
{"title":"Experimental Investigation of the Friction Modifying Effects of Graphene and C60 Fullerene Used as Nanoadditives in Engine Lubricating Oil Performed on an Oscillating Tribometer","authors":"C. Tóth-Nagy, Á. Szabó","doi":"10.3311/pptr.20594","DOIUrl":"https://doi.org/10.3311/pptr.20594","url":null,"abstract":"The present article presents the results of tribological investigations performed on an off-the-shelf engine lubricant containing nanoadditives of multilayered graphene and C60 fullerene alternately. As anthropogenic CO2 is believed to be highly responsible for global climate change, its emission is regulated in many countries. CO2 emissions can be significantly decreased by improving the efficiency i.e. decreasing the losses in an engine. Hence reducing frictional losses was the ultimate scope of the investigations presented in this article. The experiments were carried out on an oscillating tribometer at the Department of Internal Combustion Engines at Széchenyi István University. The experiments showed that multilayered graphene in engine lubricant did not modify the friction coefficient inevitably (-1% to +4%). Fullerene nanoparticles, however, reduced the friction by 4–8%. The optimal fullerene doping quantity that resulted in the lowest friction showed to be at around 0.14 wt%.","PeriodicalId":39536,"journal":{"name":"Periodica Polytechnica Transportation Engineering","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47687433","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
SARS-CoV-2 is a pandemic that affects road traffic flaw and crashes globally. This study attempted to compare the situation of road traffic crashes in the city of Budapest before and after the SARS-CoV-2 pandemic to better understand its long-term percussive effects. The study considers 12208 road traffic crashes that registered between 20 May 2018 – 31 December 2021. The rate and severity of road traffic crashes during the SARS-CoV-2 pandemic examined by using a percentage frequency distribution and a severity index. This study depicted that most crashes reported during the normal daytime between15:01-18:00 (peak hour). The study indicated that during the SARS-CoV-2 pandemic the road traffic crashes were reduced by 20.15%. A rear-end collision was one of the most common type of catastrophes highly registered. Road users, particularly drivers, heavily endorsed crashes. Even though the proportion of road traffic crashes caused by alcohol consumption was modest (6%), the rate of alcohol consumption and its concentration increased slightly during the SARS-CoV-2 pandemic. At the same time the number of crashes caused by high-speed traffic maneuvers reduced. Improper interpretation of road traffic signs, road pavement condition and failure to respect proper sight distance were influential reasons of road traffic crashes among the top. Meanwhile, the distributional impact of careless driving in the aftermath of the SARS-CoV-2 pandemic causes a shift in rank. Therefore, this study proved that during SARS-CoV-2 pandemics road traffic crashes reduced, the rate and concentration of alcohol consumption increased, and careless driving was encouraged.
{"title":"Long Term, Pre, and Post Impacts of SARS-CoV-2 Pandemic on Road Traffic Crashes in the Case of Budapest, Hungary","authors":"Debela Jima, T. Sipos","doi":"10.3311/pptr.20765","DOIUrl":"https://doi.org/10.3311/pptr.20765","url":null,"abstract":"SARS-CoV-2 is a pandemic that affects road traffic flaw and crashes globally. This study attempted to compare the situation of road traffic crashes in the city of Budapest before and after the SARS-CoV-2 pandemic to better understand its long-term percussive effects. The study considers 12208 road traffic crashes that registered between 20 May 2018 – 31 December 2021. The rate and severity of road traffic crashes during the SARS-CoV-2 pandemic examined by using a percentage frequency distribution and a severity index. This study depicted that most crashes reported during the normal daytime between15:01-18:00 (peak hour). The study indicated that during the SARS-CoV-2 pandemic the road traffic crashes were reduced by 20.15%. A rear-end collision was one of the most common type of catastrophes highly registered. Road users, particularly drivers, heavily endorsed crashes. Even though the proportion of road traffic crashes caused by alcohol consumption was modest (6%), the rate of alcohol consumption and its concentration increased slightly during the SARS-CoV-2 pandemic. At the same time the number of crashes caused by high-speed traffic maneuvers reduced. Improper interpretation of road traffic signs, road pavement condition and failure to respect proper sight distance were influential reasons of road traffic crashes among the top. Meanwhile, the distributional impact of careless driving in the aftermath of the SARS-CoV-2 pandemic causes a shift in rank. Therefore, this study proved that during SARS-CoV-2 pandemics road traffic crashes reduced, the rate and concentration of alcohol consumption increased, and careless driving was encouraged.","PeriodicalId":39536,"journal":{"name":"Periodica Polytechnica Transportation Engineering","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-03-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44743849","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Speeding, which encompasses driving above the speed limits, is an aggravating factor in the severity of crashes. It has also serious consequences on the environment and energy consumption.This paper aims to thoroughly investigate the speeding behavior of Jordanian drivers through a comprehensive statistical analysis of driver speeding attitudes and behavior reaching to the most effective interventions and strategies that would mitigate this phenomenon.Data were collected through distributing a pre-designed questionnaire and receiving a total of 1,049 responses. The Public Security Directorate (PSD) provided the speed-related data.The collected data were subjected to rigorous statistical analysis including factor analysis, bivariate Pearson's correlation test, bivariate analysis, and multivariate logistic regression analysis.Based on the outcome of the study, potential measures for reducing speeding that would be both effective and personally acceptable in Jordan are recommended. The dominant measures were mainly law enforcement actions since it is believed that financial disincentives are most effective.
{"title":"An In-depth Statistical Analysis of Driver Speeding Attitudes and Behavior","authors":"A. Atieh, K. Jadaan, H. Naghawi","doi":"10.3311/pptr.20450","DOIUrl":"https://doi.org/10.3311/pptr.20450","url":null,"abstract":"Speeding, which encompasses driving above the speed limits, is an aggravating factor in the severity of crashes. It has also serious consequences on the environment and energy consumption.This paper aims to thoroughly investigate the speeding behavior of Jordanian drivers through a comprehensive statistical analysis of driver speeding attitudes and behavior reaching to the most effective interventions and strategies that would mitigate this phenomenon.Data were collected through distributing a pre-designed questionnaire and receiving a total of 1,049 responses. The Public Security Directorate (PSD) provided the speed-related data.The collected data were subjected to rigorous statistical analysis including factor analysis, bivariate Pearson's correlation test, bivariate analysis, and multivariate logistic regression analysis.Based on the outcome of the study, potential measures for reducing speeding that would be both effective and personally acceptable in Jordan are recommended. The dominant measures were mainly law enforcement actions since it is believed that financial disincentives are most effective.","PeriodicalId":39536,"journal":{"name":"Periodica Polytechnica Transportation Engineering","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48031560","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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