Pub Date : 2023-12-01DOI: 10.1016/j.jtte.2023.11.002
Zengping Zhang , Hao Liu , Xiaoyi Ban , Xiaosong Liu , Yinxiao Guo , Jia Sun , Yanqi Liu , Suyu Zhang , Jiahao Lei
Thermosetting resins have advantages such as high strength, corrosion resistance, and aging resistance, and have excellent prospects for practical application as asphalt modifiers. In order to promote the research of thermosetting resin modified asphalt, to provide direction for its further research, this paper reviews the research progress of thermosetting resin modified asphalt in recent years. The material composition, modification mechanism, and curing behavior of epoxy asphalt, thermosetting polyurethane modified asphalt, unsaturated polyester modified asphalt, and other thermosetting resin modified asphalts are overviewed. Different types of thermosetting resin modified asphalt have different performances, the performance advantages of different thermosetting resin modified asphalts are summarized. At the same time, the existing problems in thermosetting resin modified asphalt and further research directions are provided. Encouraging researchers to produce thermosetting resin modified asphalts using waste or bio-based materials, and to study the recycling technologies and life cycle assessment of thermosetting resin modified asphalt. This paper provides a reference for the study of thermosetting resin modified asphalt.
{"title":"Thermosetting resin modified asphalt: A comprehensive review","authors":"Zengping Zhang , Hao Liu , Xiaoyi Ban , Xiaosong Liu , Yinxiao Guo , Jia Sun , Yanqi Liu , Suyu Zhang , Jiahao Lei","doi":"10.1016/j.jtte.2023.11.002","DOIUrl":"10.1016/j.jtte.2023.11.002","url":null,"abstract":"<div><div>Thermosetting resins have advantages such as high strength, corrosion resistance, and aging resistance, and have excellent prospects for practical application as asphalt modifiers. In order to promote the research of thermosetting resin modified asphalt, to provide direction for its further research, this paper reviews the research progress of thermosetting resin modified asphalt in recent years. The material composition, modification mechanism, and curing behavior of epoxy asphalt, thermosetting polyurethane modified asphalt, unsaturated polyester modified asphalt, and other thermosetting resin modified asphalts are overviewed. Different types of thermosetting resin modified asphalt have different performances, the performance advantages of different thermosetting resin modified asphalts are summarized. At the same time, the existing problems in thermosetting resin modified asphalt and further research directions are provided. Encouraging researchers to produce thermosetting resin modified asphalts using waste or bio-based materials, and to study the recycling technologies and life cycle assessment of thermosetting resin modified asphalt. This paper provides a reference for the study of thermosetting resin modified asphalt.</div></div>","PeriodicalId":47239,"journal":{"name":"Journal of Traffic and Transportation Engineering-English Edition","volume":"10 6","pages":"Pages 1001-1036"},"PeriodicalIF":7.4,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143205936","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-01DOI: 10.1016/j.jtte.2023.11.001
Qiuling Wang , Kailiang An , Zhizhen Liu , Wenying Guan
In order to ensure the safety of connected and automated vehicles (CAVs) threatened by cyberattack in the confluence area and mitigate the adverse impact of cyberattack propagation, a framework is built to depict the impact of cyberattacks on traffic operation. Based on this framework, corresponding propagation suppression strategies are proposed for different types of cyberattacks in different periods. Under centralized control, game theory is used to solve the confluence sequence corresponding to the strategies. The results show that the proposed method can effectively inhibit the spread of cyberattacks on the premise of security. The initial control effect is the best. Compared with uncontrolled condition, in the 100 timesteps, 11 susceptible vehicles are finally added, and the second is the immunity period, in which 10 susceptible vehicles were protected from cyberattack. Outbreak and latency control strategies also protect some vehicles. Under the control strategy of each stage, the peak value of infected vehicles and the duration of cyberattack are improved compared with the uncontrolled strategy. In addition, the traffic efficiency in the confluence area is also improved. This method can also be extended to such road types as diverging section, weaving section and intersection, so as to reduce the impact of cyberattacks on road network scale.
{"title":"Suppression strategies in different propagation periods of cyberattacks in merging area under connected environment","authors":"Qiuling Wang , Kailiang An , Zhizhen Liu , Wenying Guan","doi":"10.1016/j.jtte.2023.11.001","DOIUrl":"10.1016/j.jtte.2023.11.001","url":null,"abstract":"<div><div>In order to ensure the safety of connected and automated vehicles (CAVs) threatened by cyberattack in the confluence area and mitigate the adverse impact of cyberattack propagation, a framework is built to depict the impact of cyberattacks on traffic operation. Based on this framework, corresponding propagation suppression strategies are proposed for different types of cyberattacks in different periods. Under centralized control, game theory is used to solve the confluence sequence corresponding to the strategies. The results show that the proposed method can effectively inhibit the spread of cyberattacks on the premise of security. The initial control effect is the best. Compared with uncontrolled condition, in the 100 timesteps, 11 susceptible vehicles are finally added, and the second is the immunity period, in which 10 susceptible vehicles were protected from cyberattack. Outbreak and latency control strategies also protect some vehicles. Under the control strategy of each stage, the peak value of infected vehicles and the duration of cyberattack are improved compared with the uncontrolled strategy. In addition, the traffic efficiency in the confluence area is also improved. This method can also be extended to such road types as diverging section, weaving section and intersection, so as to reduce the impact of cyberattacks on road network scale.</div></div>","PeriodicalId":47239,"journal":{"name":"Journal of Traffic and Transportation Engineering-English Edition","volume":"10 6","pages":"Pages 1148-1161"},"PeriodicalIF":7.4,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143205751","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-01DOI: 10.1016/j.jtte.2023.04.009
Minqing Zhu , Zi Wang , Hongjun Cui , Yizhe Yang , Peiqi Qie
The construction of rural transportation infrastructure is of great significance to promote the organic integration of transportation construction with resource exploitation and industrial development in rural areas, and realize poverty alleviation and poverty reduction driven by convenient transportation. In order to understand the research status of rural transport infrastructure at home and abroad, this paper adopts CiteSpace, VOSviewer, Pajek, SPSS and other software and makes quantitative analysis and knowledge map drawing of the literature on rural transportation infrastructure collected in Web of Science database. The results show that the emphasis of this field is different in different periods, Chinese scholars' attention to this field increased significantly after the rural revitalization strategy was put forward. Based on the classification results of keyword clustering, the following conclusions are drawn: The planning mode of rural transportation infrastructure under rural revitalization is relatively backward and the lack of theoretical analysis of the root causes has achieved the purpose of rational allocation of transportation resources. Moreover, there are few studies on the mechanism and empirical analysis of transport infrastructure's effect on rural poverty reduction. From the analysis of research hotspots, the integration of urban and rural areas and rural road safety will be the main research direction in the future, and rural road accidents and other topics have research potential.
{"title":"Situation and hotspot analysis on rural transport infrastructure from the perspective of bibliometric analysis","authors":"Minqing Zhu , Zi Wang , Hongjun Cui , Yizhe Yang , Peiqi Qie","doi":"10.1016/j.jtte.2023.04.009","DOIUrl":"10.1016/j.jtte.2023.04.009","url":null,"abstract":"<div><div>The construction of rural transportation infrastructure is of great significance to promote the organic integration of transportation construction with resource exploitation and industrial development in rural areas, and realize poverty alleviation and poverty reduction driven by convenient transportation. In order to understand the research status of rural transport infrastructure at home and abroad, this paper adopts CiteSpace, VOSviewer, Pajek, SPSS and other software and makes quantitative analysis and knowledge map drawing of the literature on rural transportation infrastructure collected in Web of Science database. The results show that the emphasis of this field is different in different periods, Chinese scholars' attention to this field increased significantly after the rural revitalization strategy was put forward. Based on the classification results of keyword clustering, the following conclusions are drawn: The planning mode of rural transportation infrastructure under rural revitalization is relatively backward and the lack of theoretical analysis of the root causes has achieved the purpose of rational allocation of transportation resources. Moreover, there are few studies on the mechanism and empirical analysis of transport infrastructure's effect on rural poverty reduction. From the analysis of research hotspots, the integration of urban and rural areas and rural road safety will be the main research direction in the future, and rural road accidents and other topics have research potential.</div></div>","PeriodicalId":47239,"journal":{"name":"Journal of Traffic and Transportation Engineering-English Edition","volume":"10 6","pages":"Pages 1074-1098"},"PeriodicalIF":7.4,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143205987","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-01DOI: 10.1016/j.jtte.2023.09.003
Wei Ji , Quan Yuan , Gang Cheng , Shengnan Yu , Min Wang , Zefang Shen , Tiantong Yang
As a characteristic representative of the new generation of vehicles, autonomous driving is expected to improve people's driving experience. The study on traffic accident of autonomous vehicles (AVs) helps provide suggestions for autonomous driving safety from multiple disciplines and perspectives, and provide support for formulating traffic accident treatment schemes. Knowledge mapping, as a cutting-edge research method in bibliometrics, scientifically and objectively displays the relevant research status using visual means. This paper uses CiteSpace 6.1.r3 to analyze 5068 related literature on the Web of Science database from 1991 to 2022 and finds out major thematic clusters, important documents and representative journals according to citation frequency. The results show that research on traffic accidents involving AVs focuses on accident preventing technologies, including how to avoid collisions, track lane-position, and enhance vehicle-to-everything (V2X) communication. This paper extracts the mean research topics and key points involved in the field and illustrates journals related to AVs and traffic accidents, which provides guidance for subsequent researchers to carry out in-depth research and contribute their papers. Popular journals are in disciplines of mathematics, systems, computer, economics, and social science. This paper also suggests scholars to consider the aspects of scene reconstruction, cause analysis, and injury of vulnerable road users, so as to investigate traffic accidents and put forward effective treatment schemes to reduce AV accidents, and ultimately improve road safety.
{"title":"Traffic accidents of autonomous vehicles based on knowledge mapping: A review","authors":"Wei Ji , Quan Yuan , Gang Cheng , Shengnan Yu , Min Wang , Zefang Shen , Tiantong Yang","doi":"10.1016/j.jtte.2023.09.003","DOIUrl":"10.1016/j.jtte.2023.09.003","url":null,"abstract":"<div><div>As a characteristic representative of the new generation of vehicles, autonomous driving is expected to improve people's driving experience. The study on traffic accident of autonomous vehicles (AVs) helps provide suggestions for autonomous driving safety from multiple disciplines and perspectives, and provide support for formulating traffic accident treatment schemes. Knowledge mapping, as a cutting-edge research method in bibliometrics, scientifically and objectively displays the relevant research status using visual means. This paper uses CiteSpace 6.1.r3 to analyze 5068 related literature on the Web of Science database from 1991 to 2022 and finds out major thematic clusters, important documents and representative journals according to citation frequency. The results show that research on traffic accidents involving AVs focuses on accident preventing technologies, including how to avoid collisions, track lane-position, and enhance vehicle-to-everything (V2X) communication. This paper extracts the mean research topics and key points involved in the field and illustrates journals related to AVs and traffic accidents, which provides guidance for subsequent researchers to carry out in-depth research and contribute their papers. Popular journals are in disciplines of mathematics, systems, computer, economics, and social science. This paper also suggests scholars to consider the aspects of scene reconstruction, cause analysis, and injury of vulnerable road users, so as to investigate traffic accidents and put forward effective treatment schemes to reduce AV accidents, and ultimately improve road safety.</div></div>","PeriodicalId":47239,"journal":{"name":"Journal of Traffic and Transportation Engineering-English Edition","volume":"10 6","pages":"Pages 1061-1073"},"PeriodicalIF":7.4,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143205989","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-01DOI: 10.1016/j.jtte.2023.07.008
Shaohui Li , Peiwen Hao
A state-of-the-art review was delivered in the manuscript to analyze the current situations and the advantages/disadvantages of resilient deformation related issues to the unbound granular material (UGM), including testing methods, influencing factors and constitutive models, through which the bottlenecks in UGM resilient deformation characterizations were located and new theories and future research recommendations were proposed. Compared with other testing methods, the hollow cylinder test and true triaxial test are the only two to determine the anisotropic moduli of the UGM. Although significant advantages are observed in more advanced test apparatus such as true triaxial test, further improvements should be made, such as more advanced process identification control algorithm, to more conveniently control the nine independent hydraulic system and accurately measure UGM anisotropic properties. Confusions and conflicts in understanding the influencing factors to UGM resilient modulus were located, such as the stress history, the residual stress, the dry density, the gradation/fine content and the freeze-thaw cycle, based on which future research could be conducted. Through reviewing evolutions of the UGM constitutive models and comparing their representativeness and complexity comprehensively, major drawbacks were discovered and a new theory was proposed afterward to modify the UGM constitutive model, although further validations are still needed.
{"title":"Current situations, advantages/disadvantages and future developments of resilient deformation characterizations of unbound granular material: A state-of-the-art review","authors":"Shaohui Li , Peiwen Hao","doi":"10.1016/j.jtte.2023.07.008","DOIUrl":"10.1016/j.jtte.2023.07.008","url":null,"abstract":"<div><div>A state-of-the-art review was delivered in the manuscript to analyze the current situations and the advantages/disadvantages of resilient deformation related issues to the unbound granular material (UGM), including testing methods, influencing factors and constitutive models, through which the bottlenecks in UGM resilient deformation characterizations were located and new theories and future research recommendations were proposed. Compared with other testing methods, the hollow cylinder test and true triaxial test are the only two to determine the anisotropic moduli of the UGM. Although significant advantages are observed in more advanced test apparatus such as true triaxial test, further improvements should be made, such as more advanced process identification control algorithm, to more conveniently control the nine independent hydraulic system and accurately measure UGM anisotropic properties. Confusions and conflicts in understanding the influencing factors to UGM resilient modulus were located, such as the stress history, the residual stress, the dry density, the gradation/fine content and the freeze-thaw cycle, based on which future research could be conducted. Through reviewing evolutions of the UGM constitutive models and comparing their representativeness and complexity comprehensively, major drawbacks were discovered and a new theory was proposed afterward to modify the UGM constitutive model, although further validations are still needed.</div></div>","PeriodicalId":47239,"journal":{"name":"Journal of Traffic and Transportation Engineering-English Edition","volume":"10 6","pages":"Pages 964-1000"},"PeriodicalIF":7.4,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143205658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-01DOI: 10.1016/j.jtte.2023.04.008
Guozhu Cheng, Xuanling Liu, Yulong Pei
The prioritization of public transit as an essential means of promoting sustainable urban development has a significant role in improving the quality of public transportation services, reducing traffic congestion, and enhancing air quality. To improve the implementation of public transit prioritization policies, this study conducted a comprehensive review of relevant literature on public transit prioritization from two major citation databases (Web of Science and China National Knowledge Infrastructure) from 2003 to 2021. Utilizing the visualization analysis software CiteSpace, this study analyzed knowledge visualization from five aspects: research sources, research institutions, knowledge foundation, knowledge frontier, and research hotspots, and summarized the research history and implementation effectiveness of public transit prioritization policies. The study concludes that existing research has some deficiencies in terms of urban diversity, comprehensive evaluation system, holistic perspective, interdisciplinary collaboration, and consideration of economic and environmental impacts. Future research should focus on development directions such as intelligence, sustainability, interdisciplinary collaboration, and integration of multi-modal transportation. The findings of this study can provide valuable references for the implementation of public transportation prioritization policies and future research.
{"title":"A review of research on public transport priority based on CiteSpace","authors":"Guozhu Cheng, Xuanling Liu, Yulong Pei","doi":"10.1016/j.jtte.2023.04.008","DOIUrl":"10.1016/j.jtte.2023.04.008","url":null,"abstract":"<div><div>The prioritization of public transit as an essential means of promoting sustainable urban development has a significant role in improving the quality of public transportation services, reducing traffic congestion, and enhancing air quality. To improve the implementation of public transit prioritization policies, this study conducted a comprehensive review of relevant literature on public transit prioritization from two major citation databases (Web of Science and China National Knowledge Infrastructure) from 2003 to 2021. Utilizing the visualization analysis software CiteSpace, this study analyzed knowledge visualization from five aspects: research sources, research institutions, knowledge foundation, knowledge frontier, and research hotspots, and summarized the research history and implementation effectiveness of public transit prioritization policies. The study concludes that existing research has some deficiencies in terms of urban diversity, comprehensive evaluation system, holistic perspective, interdisciplinary collaboration, and consideration of economic and environmental impacts. Future research should focus on development directions such as intelligence, sustainability, interdisciplinary collaboration, and integration of multi-modal transportation. The findings of this study can provide valuable references for the implementation of public transportation prioritization policies and future research.</div></div>","PeriodicalId":47239,"journal":{"name":"Journal of Traffic and Transportation Engineering-English Edition","volume":"10 6","pages":"Pages 1118-1147"},"PeriodicalIF":7.4,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143266102","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-01DOI: 10.1016/j.jtte.2023.05.005
Elena Gaudenzi , Fabrizio Cardone , Xiaohu Lu , Francesco Canestrari
The use of alternative renewable sources to totally or partially replace bitumen is one of the most current challenges in the road pavement sector. The growing energy cost and environmental concerns lead to the necessity to find alternative solutions, by supporting at the same time sustainability and circular economy principles. Within this framework, this paper presents the application of a powder lignin, a natural bio-polymer deriving from by-products of wood pulp and paper industry, to replace part of bitumen. The bituminous blend consisting in 70% of bitumen and 30% of powder lignin (by weight) was made in laboratory through the use of a high shear stirring mixer, and a reference plain bitumen characterized by a similar consistency (i.e., same penetration grade) was used as comparison. Then, an extensive investigation on chemical and rheological properties of the bio-binder is presented. Fourier transform infrared spectroscopy (FTIR), saturates, aromatics, resins and asphaltenes (SARA), bending beam rheometer (BBR), frequency sweep tests and multiple stress creep recovery tests (MSCR) with a dynamic shear rheometer (DSR) were performed. Moreover, unaged, short- and long-term aging conditions were considered. Results indicated that powder lignin dominates the rheological behavior of the bio-binder and, from chemical analysis, it seems that it partially acts as a filler and partially as a binder. This would result in improved performances at both low and high temperatures, leading to a wider temperature range of performance grade (PG). Moreover, despite a stiffening effect is recognized, lignin also offers an antioxidant potentiality, reducing the aging susceptibility of the investigated bio-binder.
{"title":"Chemical and rheological analysis of unaged and aged bio-extended binders containing lignin","authors":"Elena Gaudenzi , Fabrizio Cardone , Xiaohu Lu , Francesco Canestrari","doi":"10.1016/j.jtte.2023.05.005","DOIUrl":"10.1016/j.jtte.2023.05.005","url":null,"abstract":"<div><div>The use of alternative renewable sources to totally or partially replace bitumen is one of the most current challenges in the road pavement sector. The growing energy cost and environmental concerns lead to the necessity to find alternative solutions, by supporting at the same time sustainability and circular economy principles. Within this framework, this paper presents the application of a powder lignin, a natural bio-polymer deriving from by-products of wood pulp and paper industry, to replace part of bitumen. The bituminous blend consisting in 70% of bitumen and 30% of powder lignin (by weight) was made in laboratory through the use of a high shear stirring mixer, and a reference plain bitumen characterized by a similar consistency (i.e., same penetration grade) was used as comparison. Then, an extensive investigation on chemical and rheological properties of the bio-binder is presented. Fourier transform infrared spectroscopy (FTIR), saturates, aromatics, resins and asphaltenes (SARA), bending beam rheometer (BBR), frequency sweep tests and multiple stress creep recovery tests (MSCR) with a dynamic shear rheometer (DSR) were performed. Moreover, unaged, short- and long-term aging conditions were considered. Results indicated that powder lignin dominates the rheological behavior of the bio-binder and, from chemical analysis, it seems that it partially acts as a filler and partially as a binder. This would result in improved performances at both low and high temperatures, leading to a wider temperature range of performance grade (PG). Moreover, despite a stiffening effect is recognized, lignin also offers an antioxidant potentiality, reducing the aging susceptibility of the investigated bio-binder.</div></div>","PeriodicalId":47239,"journal":{"name":"Journal of Traffic and Transportation Engineering-English Edition","volume":"10 6","pages":"Pages 947-963"},"PeriodicalIF":7.4,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143205657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-01DOI: 10.1016/j.jtte.2023.07.007
Armira Kontaxi, Dimosthenis-Marios Tzoutzoulis, Apostolos Ziakopoulos, George Yannis
The present research aimed to identify critical factors that affect speeding behavior. For that purpose, high-resolution smartphone data collected from a naturalistic driving experiment of 88 drivers were utilized, augmented with data from self-reported questionnaires. Using risk exposure and driving behavior indicators calculated from smartphone sensor data, as well as demographic characteristics and self-reported driving performance, statistical analysis was carried out for modelling the percentage of driving time over the speed limit, namely by means of generalized linear mixed-effects models. More precisely, an overall model was developed for all road environments, and additional separate models were developed for driving on urban and rural roads. The results from the interpretation of the estimated parameters of the models can be summarized as follows: the parameters of trip distance and mobile phone use while driving have been determined as statistically significant and positively correlated with the percentage of speeding time during a driver's trip. In the same context, male drivers and drivers in the age group of 18–34 also increase the percentages of speeding instances while driving. Regarding driving behavior as stated on the questionnaire, it seems that low frequencies of self-declared speeding (never or rarely) are statistically significant and negatively correlated with the percentage of speeding time. It is expected that this research can provide considerable gains to society, since the stakeholders including policy makers and industry could rely on the results and recommendations regarding risk factors that appear to be critical for safe driving.
{"title":"Exploring speeding behavior using naturalistic car driving data from smartphones","authors":"Armira Kontaxi, Dimosthenis-Marios Tzoutzoulis, Apostolos Ziakopoulos, George Yannis","doi":"10.1016/j.jtte.2023.07.007","DOIUrl":"10.1016/j.jtte.2023.07.007","url":null,"abstract":"<div><div>The present research aimed to identify critical factors that affect speeding behavior. For that purpose, high-resolution smartphone data collected from a naturalistic driving experiment of 88 drivers were utilized, augmented with data from self-reported questionnaires. Using risk exposure and driving behavior indicators calculated from smartphone sensor data, as well as demographic characteristics and self-reported driving performance, statistical analysis was carried out for modelling the percentage of driving time over the speed limit, namely by means of generalized linear mixed-effects models. More precisely, an overall model was developed for all road environments, and additional separate models were developed for driving on urban and rural roads. The results from the interpretation of the estimated parameters of the models can be summarized as follows: the parameters of trip distance and mobile phone use while driving have been determined as statistically significant and positively correlated with the percentage of speeding time during a driver's trip. In the same context, male drivers and drivers in the age group of 18–34 also increase the percentages of speeding instances while driving. Regarding driving behavior as stated on the questionnaire, it seems that low frequencies of self-declared speeding (never or rarely) are statistically significant and negatively correlated with the percentage of speeding time. It is expected that this research can provide considerable gains to society, since the stakeholders including policy makers and industry could rely on the results and recommendations regarding risk factors that appear to be critical for safe driving.</div></div>","PeriodicalId":47239,"journal":{"name":"Journal of Traffic and Transportation Engineering-English Edition","volume":"10 6","pages":"Pages 1162-1173"},"PeriodicalIF":7.4,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143205761","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-01DOI: 10.1016/j.jtte.2023.07.009
Xinying Zhang , Kelly Pitera , Yuanqing Wang
Growing private vehicle use and a limited supply of parking resources have increased competition for parking spaces. Ineffective searching for parking spaces is a significant barrier to smooth traffic flow. Smart technology-generated parking reservations are regarded as an excellent way to increase parking efficiency and lessen traffic. Although there is increased attention on smart parking research and parking reservation optimization, a scoping review is currently lacking. Therefore, the purpose of this paper is to provide a comprehensive review of the research literature related to parking reservations. Out of the original 438 publications identified in this search, 99 were eventually chosen for analysis. The review categorized parking reservations into four research topics: inventory control, allocation decisions, pricing strategies, and performance evaluation. The elements considered in these research themes, modeling techniques, and evaluation criteria are explored in detail. In addition, the challenges and further enhancements of parking reservation optimization are discussed. It is believed that the findings from this study will be beneficial in further research on parking reservations.
{"title":"Parking reservation techniques: A review of research topics, considerations, and optimization methods","authors":"Xinying Zhang , Kelly Pitera , Yuanqing Wang","doi":"10.1016/j.jtte.2023.07.009","DOIUrl":"10.1016/j.jtte.2023.07.009","url":null,"abstract":"<div><div>Growing private vehicle use and a limited supply of parking resources have increased competition for parking spaces. Ineffective searching for parking spaces is a significant barrier to smooth traffic flow. Smart technology-generated parking reservations are regarded as an excellent way to increase parking efficiency and lessen traffic. Although there is increased attention on smart parking research and parking reservation optimization, a scoping review is currently lacking. Therefore, the purpose of this paper is to provide a comprehensive review of the research literature related to parking reservations. Out of the original 438 publications identified in this search, 99 were eventually chosen for analysis. The review categorized parking reservations into four research topics: inventory control, allocation decisions, pricing strategies, and performance evaluation. The elements considered in these research themes, modeling techniques, and evaluation criteria are explored in detail. In addition, the challenges and further enhancements of parking reservation optimization are discussed. It is believed that the findings from this study will be beneficial in further research on parking reservations.</div></div>","PeriodicalId":47239,"journal":{"name":"Journal of Traffic and Transportation Engineering-English Edition","volume":"10 6","pages":"Pages 1099-1117"},"PeriodicalIF":7.4,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143205988","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-12-01DOI: 10.1016/j.jtte.2022.09.002
Limin Geng , Hongliang Xiao , Yuxuan Cui , Nan Gao , Qi Li , Hao Chen , Yuantao Xie
Energy shortage and environmental pollution are becoming more serious, biodiesel is regarded as the most promising alternative fuel for diesel engines due to its environmentally friendly and renewable characteristics. In this study, the biodiesel-ethanol blends were used in a diesel engine, and the purpose of the study was to simultaneously control the NOx and soot emissions of the diesel engine by adjusting the injection strategy and EGR rate. A turbocharged, six-cylinder, common rail direct injection (CRDI) engine model was established using GT-Power. The effects of the main-post injection strategy and post injection coupled with exhaust gas recirculation (EGR) on combustion and emission characteristics were investigated at a maximum torque speed and a medium load. The results show that when the main-post injection strategy is employed, the combustion duration of the main injection is shortened with an increase in the main-post injection interval (MPI). When the MPI increased to more than 18 °CA, the heat release of post injection could be observed clearly from the curve of the heat release rate, NOx emissions decreased by 5.70% and 7.12%, respectively, and soot emissions decreased by 25.56% and 30.20%, respectively. Moreover, with the increasing post injection quantity, the combustion duration of the main injection shortened, and the peak heat release rate (PHRR) of the post injection increased. When the fuel quantity for the post injection increased from 2 to 6 mg, NOx emissions decreased from 2.33% to 9.80%, and soot emissions decreased from 16.10% to 34.97%. The effect of post injection quantity on emissions was more significant than that of the MPI. In addition, with increasing EGR rate, the ignition delay is prolonged, the peak cylinder pressure, PHRR, peak combustion temperature and NOx emissions decrease, whereas soot emissions increase gradually. Main-post injection can improve the NOx-soot trade-off, the optimal EGR rate is 22.86% under a post injection quantity of 4 mg and a MPI of 22 °CA.
{"title":"Numerical study of effect of post injection coupled with EGR on combustion and emission performances of CRDI engine fueled with biodiesel-ethanol blends","authors":"Limin Geng , Hongliang Xiao , Yuxuan Cui , Nan Gao , Qi Li , Hao Chen , Yuantao Xie","doi":"10.1016/j.jtte.2022.09.002","DOIUrl":"10.1016/j.jtte.2022.09.002","url":null,"abstract":"<div><div>Energy shortage and environmental pollution are becoming more serious, biodiesel is regarded as the most promising alternative fuel for diesel engines due to its environmentally friendly and renewable characteristics. In this study, the biodiesel-ethanol blends were used in a diesel engine, and the purpose of the study was to simultaneously control the NO<sub><em>x</em></sub> and soot emissions of the diesel engine by adjusting the injection strategy and EGR rate. A turbocharged, six-cylinder, common rail direct injection (CRDI) engine model was established using GT-Power. The effects of the main-post injection strategy and post injection coupled with exhaust gas recirculation (EGR) on combustion and emission characteristics were investigated at a maximum torque speed and a medium load. The results show that when the main-post injection strategy is employed, the combustion duration of the main injection is shortened with an increase in the main-post injection interval (MPI). When the MPI increased to more than 18 °CA, the heat release of post injection could be observed clearly from the curve of the heat release rate, NO<sub><em>x</em></sub> emissions decreased by 5.70% and 7.12%, respectively, and soot emissions decreased by 25.56% and 30.20%, respectively. Moreover, with the increasing post injection quantity, the combustion duration of the main injection shortened, and the peak heat release rate (PHRR) of the post injection increased. When the fuel quantity for the post injection increased from 2 to 6 mg, NO<sub><em>x</em></sub> emissions decreased from 2.33% to 9.80%, and soot emissions decreased from 16.10% to 34.97%. The effect of post injection quantity on emissions was more significant than that of the MPI. In addition, with increasing EGR rate, the ignition delay is prolonged, the peak cylinder pressure, PHRR, peak combustion temperature and NO<sub><em>x</em></sub> emissions decrease, whereas soot emissions increase gradually. Main-post injection can improve the NO<sub><em>x</em></sub>-soot trade-off, the optimal EGR rate is 22.86% under a post injection quantity of 4 mg and a MPI of 22 °CA.</div></div>","PeriodicalId":47239,"journal":{"name":"Journal of Traffic and Transportation Engineering-English Edition","volume":"10 6","pages":"Pages 1174-1186"},"PeriodicalIF":7.4,"publicationDate":"2023-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143205752","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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