Journal of Traffic and Transportation Engineering-English Edition最新文献_第6页

Mitigation of thermal effects in bridges: A comprehensive review of control methodologies 缓解桥梁热效应：控制方法的全面审查

IF 7.4 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Traffic and Transportation Engineering-English Edition

Pub Date : 2025-04-01 Epub Date: 2025-04-03 DOI: 10.1016/j.jtte.2024.12.003

Zhiyuan Ma , Yongjian Liu , Jiang Liu , Yi Lyu

Bridge structures experience complex thermal effects under the influence of environmental factors and internal heat sources, leading to adverse impacts on structural safety and durability. To enhance comprehension of bridge temperature issues and mitigate adverse thermal stress and deformation, the fundamental principles of “resistance”, “release”, “prevention”, and “utilization” are summarized based on the causes of thermal effects, which are resisting thermal stress, releasing thermal deformation, preventing temperature actions, and utilizing thermal effects. Subsequently, typical approaches are summarized based on each principle. Under the “resistance” principle, measures such as rational reinforcement design, increasing early concrete strength, and utilizing new materials with high tensile strength can be employed to reduce the risk of structural cracking. Following the “release” principle, techniques like proper arrangement of expansion joints and bearings, flexible foundation design for jointless bridge and mass concrete layering method can be utilized to release thermal deformations. Based on the “prevention” principle, reducing the hydration heat, applying heat-insulating coatings, shading panels, and phase-change materials can decrease temperature differences in the structure. Improved calculation of thermal effects during construction can also aid in construction control. Based on the “utilization” principle, it is possible to strengthen arch bridges and treat expansion joints with the help of favorable thermal effects. Finally, the advancements are prospected to make the bridge better adapted to the thermal effects.

桥梁结构在环境因素和内部热源的影响下，会经历复杂的热效应，对结构的安全性和耐久性产生不利影响。为了加强对桥梁温度问题的认识，减轻不利的热应力和热变形，根据产生热效应的原因，总结了“抵抗”、“释放”、“预防”和“利用”的基本原则，即抵抗热应力、释放热变形、防止温度作用和利用热效应。随后，根据每个原则总结了典型的方法。在“抗”原则下，可采取合理的配筋设计、提高混凝土早期强度、采用抗拉强度高的新材料等措施降低结构开裂风险。根据“释放”原则，可采用合理布置伸缩缝和支座、无接缝桥梁柔性基础设计、大体积混凝土分层法等技术释放热变形。基于“预防”原则，减少水化热，应用隔热涂料、遮阳板、相变材料等可以减小结构温差。改进施工过程中热效应的计算也有助于施工控制。基于“利用”原理，利用良好的热效应对拱桥进行加固和伸缩缝处理是可能的。最后，展望了今后的研究进展，以使桥梁更好地适应热效应。

{"title":"Mitigation of thermal effects in bridges: A comprehensive review of control methodologies","authors":"Zhiyuan Ma , Yongjian Liu , Jiang Liu , Yi Lyu","doi":"10.1016/j.jtte.2024.12.003","DOIUrl":"10.1016/j.jtte.2024.12.003","url":null,"abstract":"<div><div>Bridge structures experience complex thermal effects under the influence of environmental factors and internal heat sources, leading to adverse impacts on structural safety and durability. To enhance comprehension of bridge temperature issues and mitigate adverse thermal stress and deformation, the fundamental principles of “resistance”, “release”, “prevention”, and “utilization” are summarized based on the causes of thermal effects, which are resisting thermal stress, releasing thermal deformation, preventing temperature actions, and utilizing thermal effects. Subsequently, typical approaches are summarized based on each principle. Under the “resistance” principle, measures such as rational reinforcement design, increasing early concrete strength, and utilizing new materials with high tensile strength can be employed to reduce the risk of structural cracking. Following the “release” principle, techniques like proper arrangement of expansion joints and bearings, flexible foundation design for jointless bridge and mass concrete layering method can be utilized to release thermal deformations. Based on the “prevention” principle, reducing the hydration heat, applying heat-insulating coatings, shading panels, and phase-change materials can decrease temperature differences in the structure. Improved calculation of thermal effects during construction can also aid in construction control. Based on the “utilization” principle, it is possible to strengthen arch bridges and treat expansion joints with the help of favorable thermal effects. Finally, the advancements are prospected to make the bridge better adapted to the thermal effects.</div></div>","PeriodicalId":47239,"journal":{"name":"Journal of Traffic and Transportation Engineering-English Edition","volume":"12 2","pages":"Pages 215-235"},"PeriodicalIF":7.4,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143887001","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Bike sharing systems data interoperability by a unified station status concept and big data solutions 共享单车系统的数据互操作性由统一的站点状态概念和大数据解决方案组成

IF 7.4 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Traffic and Transportation Engineering-English Edition

Pub Date : 2025-04-01 Epub Date: 2025-04-02 DOI: 10.1016/j.jtte.2024.06.003

Francisco Márquez-Saldaña , Gonzalo A. Aranda-Corral , Joaquín Borrego-Díaz

The impact of bike sharing systems (BSS) on urban mobility, and their study as part of the overall transport system in smart cities, has attracted significant academic interest in recent years. However, the lack of historical and standardized data in current service tools hinders the analysis and improvement of these platforms, i.e. by reusing technical data-based solutions. Big data nature (in volume, variety and velocity) of collecting BSS historical information must be also addressed, in order to take an integrated perspective.

This paper describes an integrated solution to this challenge by (1) proposing a unified station status concept for recording historical information, based on the identification, study and unification of common relevant fields found in almost all BSS data warehouses, and (2) implementing a big data-inspired ETL infrastructure together with a storage optimization, methodology which not only allows to access and collect previous defined concepts but also overcomes existing big data challenge when storing BSS information. The system also consumes other external relevant information, such as weather factors, which have been aggregated, enhancing stored knowledge, with KPIs and statistics. The developed solution illustrates how it can manage over seven years of data from twenty-seven BSS, serving not only machine-to-machine communication but also human-computer communication and enabling data-driven solutions.

自行车共享系统（BSS）对城市交通的影响，以及它们作为智慧城市整体交通系统一部分的研究，近年来引起了极大的学术兴趣。然而，目前的服务工具缺乏历史和标准化的数据，阻碍了对这些平台的分析和改进，即通过重用基于数据的技术解决方案。收集BSS历史信息的大数据性质（在数量、种类和速度上）也必须得到解决，以便采取综合的观点。本文提出了一种解决方案：(1)在对几乎所有BSS数据仓库中常见的相关字段进行识别、研究和统一的基础上，提出了统一的站点状态概念，用于记录历史信息；(2)实现了一个大数据启发的ETL基础设施，并进行了存储优化。该方法不仅允许访问和收集先前定义的概念，而且在存储BSS信息时克服了现有的大数据挑战。系统还使用其他外部相关信息，例如天气因素，这些信息已经被聚合，通过kpi和统计数据增强了存储的知识。开发的解决方案说明了它如何管理来自27个BSS的超过7年的数据，不仅服务于机器对机器通信，还服务于人机通信，并实现数据驱动的解决方案。

{"title":"Bike sharing systems data interoperability by a unified station status concept and big data solutions","authors":"Francisco Márquez-Saldaña , Gonzalo A. Aranda-Corral , Joaquín Borrego-Díaz","doi":"10.1016/j.jtte.2024.06.003","DOIUrl":"10.1016/j.jtte.2024.06.003","url":null,"abstract":"<div><div>The impact of bike sharing systems (BSS) on urban mobility, and their study as part of the overall transport system in smart cities, has attracted significant academic interest in recent years. However, the lack of historical and standardized data in current service tools hinders the analysis and improvement of these platforms, i.e. by reusing technical data-based solutions. Big data nature (in volume, variety and velocity) of collecting BSS historical information must be also addressed, in order to take an integrated perspective.</div><div>This paper describes an integrated solution to this challenge by (1) proposing a unified station status concept for recording historical information, based on the identification, study and unification of common relevant fields found in almost all BSS data warehouses, and (2) implementing a big data-inspired ETL infrastructure together with a storage optimization, methodology which not only allows to access and collect previous defined concepts but also overcomes existing big data challenge when storing BSS information. The system also consumes other external relevant information, such as weather factors, which have been aggregated, enhancing stored knowledge, with KPIs and statistics. The developed solution illustrates how it can manage over seven years of data from twenty-seven BSS, serving not only machine-to-machine communication but also human-computer communication and enabling data-driven solutions.</div></div>","PeriodicalId":47239,"journal":{"name":"Journal of Traffic and Transportation Engineering-English Edition","volume":"12 2","pages":"Pages 420-433"},"PeriodicalIF":7.4,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143886806","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Alteration in delay time considering different pedestrian's crossing characteristics in the era of autonomous vehicles 自动驾驶汽车时代考虑不同行人过马路特征的延迟时间变化

IF 7.4 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Traffic and Transportation Engineering-English Edition

Pub Date : 2025-04-01 Epub Date: 2025-04-02 DOI: 10.1016/j.jtte.2024.03.007

Szilárd Szigeti , Dávid Földes , Attila Aba

Delay is one of the most crucial factors for both pedestrians and car drivers around pedestrian crossings. Drivers often do not yield to pedestrians, which may result in both delay and impatient pedestrian behaviour. This tendency may alter after introducing autonomous vehicles as the vehicles will follow the traffic rules in all cases. This study aims to estimate the delay time alteration at a simple zebra crossing using on-site measures and simulation. Roadside video recordings were carried out in Budapest, Hungary, to obtain the crossing decisions of pedestrian groups based on the approaching vehicle distance. We have determined the accepted vehicle distance vales for pedestrian groups that served as input data for microsimulation modelling. The novelty of the study is that the simulation involved autonomous vehicles that hold preset headways from the leading vehicle. The simulation was designed based on the traffic share of autonomous vehicles and the headways they kept. The main findings are that the travel time and stopping time for cars are higher if the modal share of autonomous vehicles is high. For pedestrians, however, we found a slight decrease in both travel times and stopping times. Moreover, we have proposed modifications to the simulation software (Vissim) to handle distance-dependent pedestrian decisions and drivers' failure to give priority. The results can be useful for road operators to estimate the road capacity in the era of autonomous vehicles and for software developers to formulate the simulated and real driving mechanism for autonomous vehicles.

对于人行横道周围的行人和汽车司机来说，延迟是最重要的因素之一。司机往往不给行人让路，这可能会导致延误和行人不耐烦的行为。自动驾驶汽车在任何情况下都会遵守交通规则，因此这种趋势可能会发生变化。本研究旨在利用现场测量与仿真相结合的方法，估算简单斑马线的延误时间变化。在匈牙利布达佩斯进行路边录像，根据接近的车辆距离获得行人群体的过马路决策。我们确定了行人组可接受的车辆距离值，作为微仿真建模的输入数据。这项研究的新颖之处在于，模拟涉及的自动驾驶汽车与领先车辆保持预设的领先距离。仿真是基于自动驾驶车辆的交通份额和他们保持的领先设计的。主要发现是，如果自动驾驶汽车的模式份额高，汽车的行驶时间和停车时间会更高。然而，我们发现行人的出行时间和停车时间都略有减少。此外，我们对仿真软件（Vissim）提出了修改，以处理距离依赖的行人决策和驾驶员未优先考虑的情况。研究结果可为道路运营者估计自动驾驶汽车时代的道路容量以及软件开发人员制定自动驾驶汽车的模拟和真实驾驶机制提供参考。

{"title":"Alteration in delay time considering different pedestrian's crossing characteristics in the era of autonomous vehicles","authors":"Szilárd Szigeti , Dávid Földes , Attila Aba","doi":"10.1016/j.jtte.2024.03.007","DOIUrl":"10.1016/j.jtte.2024.03.007","url":null,"abstract":"<div><div>Delay is one of the most crucial factors for both pedestrians and car drivers around pedestrian crossings. Drivers often do not yield to pedestrians, which may result in both delay and impatient pedestrian behaviour. This tendency may alter after introducing autonomous vehicles as the vehicles will follow the traffic rules in all cases. This study aims to estimate the delay time alteration at a simple zebra crossing using on-site measures and simulation. Roadside video recordings were carried out in Budapest, Hungary, to obtain the crossing decisions of pedestrian groups based on the approaching vehicle distance. We have determined the accepted vehicle distance vales for pedestrian groups that served as input data for microsimulation modelling. The novelty of the study is that the simulation involved autonomous vehicles that hold preset headways from the leading vehicle. The simulation was designed based on the traffic share of autonomous vehicles and the headways they kept. The main findings are that the travel time and stopping time for cars are higher if the modal share of autonomous vehicles is high. For pedestrians, however, we found a slight decrease in both travel times and stopping times. Moreover, we have proposed modifications to the simulation software (Vissim) to handle distance-dependent pedestrian decisions and drivers' failure to give priority. The results can be useful for road operators to estimate the road capacity in the era of autonomous vehicles and for software developers to formulate the simulated and real driving mechanism for autonomous vehicles.</div></div>","PeriodicalId":47239,"journal":{"name":"Journal of Traffic and Transportation Engineering-English Edition","volume":"12 2","pages":"Pages 378-389"},"PeriodicalIF":7.4,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143887009","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Self-healing properties and environmental evaluation of asphalt mixtures containing steelmaking waste 含炼钢废料沥青混合料的自愈性能及环境评价

IF 7.4 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Traffic and Transportation Engineering-English Edition

Pub Date : 2025-04-01 Epub Date: 2025-04-02 DOI: 10.1016/j.jtte.2023.01.005

Fan Zhang , Aimin Sha , Yangsen Cao , Baowen Lou , Wentong Wang , Ruimeng Song

Environmental pollution and resource shortages are the two most urgent issues in current society. Using steel slag as aggregates in pavement construction is promising in reducing the exploitation of non-renewable resources. Meanwhile, steel slag, as an excellent microwave-absorbing material, can accelerate the self-healing properties of the pavement. This study aims to explore a value-added development of the asphalt mixture containing steel slag to improve its self-healing properties. For this purpose, the absorbing properties of steel slag were firstly explained based on SEM, X-RD, and X-RF. Then, thermal conductivity, self-healing, and road performance were tested. Finally, the feasibility of replacing aggregates with steel slag was assessed based on environmental evaluation and economic benefits. Results indicated that the porous structure and metal elements of steel slag make it have excellent microwave heating (MH) capacity. The high-temperature stability and water stability of steel slag asphalt mixtures (SSAM) can improve by 60.76% and 5.97%, respectively, while there is a downward trend in low-temperature crack resistance. Besides, asphalt mixtures with 80% steel slag content performed excellent thermal conductivity and healing properties efficiency, which exhibited the maximum thermal parameter (1.56 W/(m·K)), healing index (92.8%), and healing level (63.7%). Based on the purpose of self-healing, 80% replacement of steel slag by volume is recommended. The comprehensive evaluation results on environmental pollution and economic benefits show that using steel slag as aggregates is highly feasible.

环境污染和资源短缺是当今社会最紧迫的两个问题。在路面施工中使用钢渣作骨料，对减少不可再生资源的开采具有重要的意义。同时，钢渣作为一种优良的吸波材料，可以加速路面的自愈性能。本研究旨在探索钢渣沥青混合料的增值开发，以提高其自愈性能。为此，首先利用扫描电镜（SEM）、X-RD和X-RF对钢渣的吸收性能进行了分析。然后，测试了导热性、自愈性和道路性能。最后，从环境评价和经济效益两方面对钢渣替代骨料的可行性进行了评价。结果表明，钢渣的多孔结构和金属元素使其具有优良的微波加热性能。钢渣沥青混合料（SSAM）的高温稳定性和水稳定性分别提高了60.76%和5.97%，而低温抗裂性有下降趋势。此外，钢渣含量为80%的沥青混合料具有优异的导热性能和修复性能，其热参数最大（1.56 W/(m·K)），修复指数最高（92.8%），修复水平最高（63.7%）。基于自愈的目的，建议按体积置换80%的钢渣。环境污染和经济效益综合评价结果表明，采用钢渣作骨料是十分可行的。

{"title":"Self-healing properties and environmental evaluation of asphalt mixtures containing steelmaking waste","authors":"Fan Zhang , Aimin Sha , Yangsen Cao , Baowen Lou , Wentong Wang , Ruimeng Song","doi":"10.1016/j.jtte.2023.01.005","DOIUrl":"10.1016/j.jtte.2023.01.005","url":null,"abstract":"<div><div>Environmental pollution and resource shortages are the two most urgent issues in current society. Using steel slag as aggregates in pavement construction is promising in reducing the exploitation of non-renewable resources. Meanwhile, steel slag, as an excellent microwave-absorbing material, can accelerate the self-healing properties of the pavement. This study aims to explore a value-added development of the asphalt mixture containing steel slag to improve its self-healing properties. For this purpose, the absorbing properties of steel slag were firstly explained based on SEM, X-RD, and X-RF. Then, thermal conductivity, self-healing, and road performance were tested. Finally, the feasibility of replacing aggregates with steel slag was assessed based on environmental evaluation and economic benefits. Results indicated that the porous structure and metal elements of steel slag make it have excellent microwave heating (MH) capacity. The high-temperature stability and water stability of steel slag asphalt mixtures (SSAM) can improve by 60.76% and 5.97%, respectively, while there is a downward trend in low-temperature crack resistance. Besides, asphalt mixtures with 80% steel slag content performed excellent thermal conductivity and healing properties efficiency, which exhibited the maximum thermal parameter (1.56 W/(m·K)), healing index (92.8%), and healing level (63.7%). Based on the purpose of self-healing, 80% replacement of steel slag by volume is recommended. The comprehensive evaluation results on environmental pollution and economic benefits show that using steel slag as aggregates is highly feasible.</div></div>","PeriodicalId":47239,"journal":{"name":"Journal of Traffic and Transportation Engineering-English Edition","volume":"12 2","pages":"Pages 288-300"},"PeriodicalIF":7.4,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143887004","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Modification of bitumen with polyether-based polyurethanes containing different hard segments 用含有不同硬段的聚醚基聚氨酯改性沥青

IF 7.4 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Traffic and Transportation Engineering-English Edition

Pub Date : 2025-04-01 Epub Date: 2025-04-03 DOI: 10.1016/j.jtte.2023.01.006

Zengping Zhang , Hao Liu , Youxin Zhu , Liqi Chen , Jia Sun , Li Wang , Ting Huang

To expand the application of polyurethane (PU) modified bitumen, it is necessary to understand the influence of PU raw materials on PU modified bitumen systematically. Three polyether-based polyurethanes were used to modify the unmodified bitumen, synthesised from toluene diisocyanate (TDI), diphenylmethane diisocyanate (MDI), and polyaryl polyisocyanate (PAPI) by reaction with polytetrahydrofuran diol (PTMEG) respectively. And the performance of polyether-based PU modified bitumen was investigated at various contents of isocyanates. Firstly, the modification mechanism of PU modified bitumen binders was analysed by Fourier transform infrared spectroscopy (FTIR). Then, the high and low temperature properties and resistance to permanent deformation of modified bitumen binders were investigated through dynamic shear rheometer (DSR) test, bending beam rheometer (BBR) test and multiple stress creep recovery (MSCR) test. Finally, the microstructure and molecular movement were analyzed by fluorescence microscopy (FM), atomic force microscopy (AFM) and differential scanning calorimetry (DSC). As the results show, there are significant differences in the molecular structure, cross-linking and hydrogen bonding of polyurethane modifiers synthesised from different isocyanates, which then affect the interaction between polyurethane molecules and bitumen molecules and result in different modification effects on bitumen. Concerning high-temperature properties and storage stability, PU synthesised by PAPI is the best solution for improving bitumen. PU synthesised by TDI offers the best improvement in low temperature performance. It is worth noting that the PU synthesised by MDI provides a more balanced improvement in high and low temperature performances. This study provides guidance for the development of PU modified bitumen.

为了扩大聚氨酯改性沥青的应用，有必要系统地了解聚氨酯原料对聚氨酯改性沥青的影响。以甲苯二异氰酸酯（TDI）、二苯基甲烷二异氰酸酯（MDI）和聚芳基聚异氰酸酯（PAPI）为原料，分别与聚四氢呋喃二醇（PTMEG）反应合成了未改性沥青。研究了不同异氰酸酯含量下聚醚基PU改性沥青的性能。首先，利用傅里叶变换红外光谱（FTIR）分析了聚氨酯改性沥青粘结剂的改性机理。然后，通过动态剪切流变仪（DSR）试验、弯曲梁流变仪（BBR）试验和多重应力蠕变恢复（MSCR）试验，研究改性沥青粘结剂的高低温性能和抗永久变形性能。最后，利用荧光显微镜（FM）、原子力显微镜（AFM）和差示扫描量热法（DSC）对其微观结构和分子运动进行了分析。结果表明，不同异氰酸酯合成的聚氨酯改性剂在分子结构、交联和氢键方面存在显著差异，从而影响聚氨酯分子与沥青分子的相互作用，对沥青产生不同的改性效果。从高温性能和贮存稳定性来看，PAPI合成PU是改善沥青的最佳方案。TDI合成PU的低温性能改善效果最好。值得注意的是，MDI合成的PU在高低温性能上的改善更为均衡。该研究对聚氨酯改性沥青的开发具有指导意义。

{"title":"Modification of bitumen with polyether-based polyurethanes containing different hard segments","authors":"Zengping Zhang , Hao Liu , Youxin Zhu , Liqi Chen , Jia Sun , Li Wang , Ting Huang","doi":"10.1016/j.jtte.2023.01.006","DOIUrl":"10.1016/j.jtte.2023.01.006","url":null,"abstract":"<div><div>To expand the application of polyurethane (PU) modified bitumen, it is necessary to understand the influence of PU raw materials on PU modified bitumen systematically. Three polyether-based polyurethanes were used to modify the unmodified bitumen, synthesised from toluene diisocyanate (TDI), diphenylmethane diisocyanate (MDI), and polyaryl polyisocyanate (PAPI) by reaction with polytetrahydrofuran diol (PTMEG) respectively. And the performance of polyether-based PU modified bitumen was investigated at various contents of isocyanates. Firstly, the modification mechanism of PU modified bitumen binders was analysed by Fourier transform infrared spectroscopy (FTIR). Then, the high and low temperature properties and resistance to permanent deformation of modified bitumen binders were investigated through dynamic shear rheometer (DSR) test, bending beam rheometer (BBR) test and multiple stress creep recovery (MSCR) test. Finally, the microstructure and molecular movement were analyzed by fluorescence microscopy (FM), atomic force microscopy (AFM) and differential scanning calorimetry (DSC). As the results show, there are significant differences in the molecular structure, cross-linking and hydrogen bonding of polyurethane modifiers synthesised from different isocyanates, which then affect the interaction between polyurethane molecules and bitumen molecules and result in different modification effects on bitumen. Concerning high-temperature properties and storage stability, PU synthesised by PAPI is the best solution for improving bitumen. PU synthesised by TDI offers the best improvement in low temperature performance. It is worth noting that the PU synthesised by MDI provides a more balanced improvement in high and low temperature performances. This study provides guidance for the development of PU modified bitumen.</div></div>","PeriodicalId":47239,"journal":{"name":"Journal of Traffic and Transportation Engineering-English Edition","volume":"12 2","pages":"Pages 344-360"},"PeriodicalIF":7.4,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143886808","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

In-depth investigation of contributing factors of fatal/severe-injury crashes at highway merging areas using machine learning classification methods 使用机器学习分类方法对高速公路合并区域致命/严重伤害事故的影响因素进行深入调查

IF 7.4 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Traffic and Transportation Engineering-English Edition

Pub Date : 2025-04-01 Epub Date: 2025-04-02 DOI: 10.1016/j.jtte.2023.06.007

Nischal Bhattarai , Ciyun Lin , Yibin Zhang , Hongchao Liu

Highway on-ramp merging locations are vulnerable to traffic collisions inflicting fatal or serious injuries to drivers. Although numerous studies have uncovered the major contributing factors to crashes at on-ramp merging areas, none of these studies have focused on fatal/severe-injury crashes. This paper aims to provide an in-depth and systematic investigation on critical contributing factors of the high-severity crashes at highway merging areas. As part of the analysis, support vector machines (SVM) and random forest (RF) models were developed for a 10-year data set of crashes at more than 250 merging locations in Texas, United States, using 23 different crash attributes describing each incident to predict high-severity crashes. A sensitivity analysis was conducted to quantify the marginal effects of each contributing factor. The results indicate that there is an increased likelihood of fatal/severe-injury crashes when the number of highway lanes is high, and the number of lanes on the frontage roads/connector roads is low (<4). Likewise, presence of heavy vehicles seems to affect the occurrence of fatal injury crashes at merging areas. Additionally, longer ramp lengths, presence of auxiliary lanes, and the proximity of exit ramps are found to increase the likelihood of high severity crashes. These findings, either new or consistent with previous studies are helpful in enriching the literature of on-ramp related highway safety studies.

高速公路入口匝道合并位置容易发生交通碰撞，对驾驶员造成致命或严重伤害。尽管许多研究已经揭示了匝道入路合并区域撞车的主要因素，但这些研究都没有关注致命/严重伤害事故。本文旨在对高速公路合流区高强度碰撞事故的主要影响因素进行深入系统的研究。作为分析的一部分，支持向量机（SVM）和随机森林（RF）模型针对美国德克萨斯州250多个合并地点的10年碰撞数据集进行了开发，使用23种不同的碰撞属性来描述每个事件，以预测高严重性碰撞。进行敏感性分析以量化每个贡献因素的边际效应。结果表明，当高速公路车道数较多，而前方道路/连接道路车道数较少时，发生致命/严重伤害事故的可能性增加（<4）。同样，重型车辆的存在似乎会影响合并区域致命伤害事故的发生。此外，较长的坡道长度、辅助车道的存在以及出口坡道的临近，都增加了发生严重碰撞的可能性。这些新发现或与以往研究一致，有助于丰富入口匝道相关公路安全研究的文献。

{"title":"In-depth investigation of contributing factors of fatal/severe-injury crashes at highway merging areas using machine learning classification methods","authors":"Nischal Bhattarai , Ciyun Lin , Yibin Zhang , Hongchao Liu","doi":"10.1016/j.jtte.2023.06.007","DOIUrl":"10.1016/j.jtte.2023.06.007","url":null,"abstract":"<div><div>Highway on-ramp merging locations are vulnerable to traffic collisions inflicting fatal or serious injuries to drivers. Although numerous studies have uncovered the major contributing factors to crashes at on-ramp merging areas, none of these studies have focused on fatal/severe-injury crashes. This paper aims to provide an in-depth and systematic investigation on critical contributing factors of the high-severity crashes at highway merging areas. As part of the analysis, support vector machines (SVM) and random forest (RF) models were developed for a 10-year data set of crashes at more than 250 merging locations in Texas, United States, using 23 different crash attributes describing each incident to predict high-severity crashes. A sensitivity analysis was conducted to quantify the marginal effects of each contributing factor. The results indicate that there is an increased likelihood of fatal/severe-injury crashes when the number of highway lanes is high, and the number of lanes on the frontage roads/connector roads is low (<4). Likewise, presence of heavy vehicles seems to affect the occurrence of fatal injury crashes at merging areas. Additionally, longer ramp lengths, presence of auxiliary lanes, and the proximity of exit ramps are found to increase the likelihood of high severity crashes. These findings, either new or consistent with previous studies are helpful in enriching the literature of on-ramp related highway safety studies.</div></div>","PeriodicalId":47239,"journal":{"name":"Journal of Traffic and Transportation Engineering-English Edition","volume":"12 2","pages":"Pages 434-446"},"PeriodicalIF":7.4,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143886807","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Investigation on the low temperature rheological properties of polymer modified asphalt 聚合物改性沥青低温流变性能研究

IF 7.4 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Traffic and Transportation Engineering-English Edition

Pub Date : 2025-04-01 Epub Date: 2025-04-03 DOI: 10.1016/j.jtte.2023.02.010

Zhen Fu , Ruimeng Song , Wen Qin , Ke Shi , Feng Ma , Jiarong Li , Chao Li

Traditional pavement is prone to cracks, and other distresses in cold regions. In this case, asphalt modification is a common technique used to improve the performance of asphalt. This study attempts to compare the low temperature properties of three modified asphalts. For this purpose, the addition of crumb rubber (CR), modified crumb rubber (MCR), and styrene-butadiene-styrene (SBS) to the base asphalt, respectively, and CR modified asphalt, MCR modified asphalt, and SBS modified asphalt is firstly prepared. Then, the asphalt specimens are subjected to a thin film oven test (TFOT) and pressurized aging vessel (PAV) test. The bending beam rheometer (BBR) test is conducted to compare the rheology characteristics and anti-aging performance of three modified asphalts. Furthermore, the low temperature performance of three modified asphalts is compared by three approaches based on the performance grade (PG), critical low temperature, and Burgers model. The BBR results show that the CR modified asphalt has the best low temperature performance. However, the CR modified asphalt show poor aging resistance, SBS modified asphalt, and MCR modified asphalt have better aging resistance. In terms of the Burgers model, it is established to analyze the resistance to low temperature cracking of four asphalts from the perspective of viscoelastic properties. Different viscoelastic parameters indicate that the low temperature performance of CR modified asphalt is superior to the other asphalts, which is consistent with the result of the critical low temperatures.

传统的路面在寒冷地区容易出现裂缝和其他病害。在这种情况下，沥青改性是一种常用的技术，用于提高沥青的性能。本研究试图比较三种改性沥青的低温性能。为此，首先在基础沥青中分别加入橡胶屑（CR）、改性橡胶屑（MCR）和苯乙烯-丁二烯-苯乙烯（SBS），制备了CR改性沥青、MCR改性沥青和SBS改性沥青。然后对沥青试件进行了薄膜烘箱试验（TFOT）和加压老化容器试验（PAV）。通过弯曲梁流变仪（BBR）试验，比较了三种改性沥青的流变特性和抗老化性能。此外，通过性能等级（PG）、临界低温和Burgers模型三种方法对三种改性沥青的低温性能进行了比较。BBR试验结果表明，CR改性沥青具有最佳的低温性能。而CR改性沥青的抗老化性能较差，SBS改性沥青和MCR改性沥青的抗老化性能较好。建立Burgers模型，从粘弹性角度分析四种沥青的耐低温开裂性能。不同的粘弹性参数表明，CR改性沥青的低温性能优于其他沥青，这与临界低温的结果一致。

{"title":"Investigation on the low temperature rheological properties of polymer modified asphalt","authors":"Zhen Fu , Ruimeng Song , Wen Qin , Ke Shi , Feng Ma , Jiarong Li , Chao Li","doi":"10.1016/j.jtte.2023.02.010","DOIUrl":"10.1016/j.jtte.2023.02.010","url":null,"abstract":"<div><div>Traditional pavement is prone to cracks, and other distresses in cold regions. In this case, asphalt modification is a common technique used to improve the performance of asphalt. This study attempts to compare the low temperature properties of three modified asphalts. For this purpose, the addition of crumb rubber (CR), modified crumb rubber (MCR), and styrene-butadiene-styrene (SBS) to the base asphalt, respectively, and CR modified asphalt, MCR modified asphalt, and SBS modified asphalt is firstly prepared. Then, the asphalt specimens are subjected to a thin film oven test (TFOT) and pressurized aging vessel (PAV) test. The bending beam rheometer (BBR) test is conducted to compare the rheology characteristics and anti-aging performance of three modified asphalts. Furthermore, the low temperature performance of three modified asphalts is compared by three approaches based on the performance grade (PG), critical low temperature, and Burgers model. The BBR results show that the CR modified asphalt has the best low temperature performance. However, the CR modified asphalt show poor aging resistance, SBS modified asphalt, and MCR modified asphalt have better aging resistance. In terms of the Burgers model, it is established to analyze the resistance to low temperature cracking of four asphalts from the perspective of viscoelastic properties. Different viscoelastic parameters indicate that the low temperature performance of CR modified asphalt is superior to the other asphalts, which is consistent with the result of the critical low temperatures.</div></div>","PeriodicalId":47239,"journal":{"name":"Journal of Traffic and Transportation Engineering-English Edition","volume":"12 2","pages":"Pages 319-330"},"PeriodicalIF":7.4,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143887006","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Innovative methods for quantifying the moisture susceptibility of asphalt mixtures 量化沥青混合料水分敏感性的创新方法

IF 7.4 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Traffic and Transportation Engineering-English Edition

Pub Date : 2025-04-01 Epub Date: 2025-04-03 DOI: 10.1016/j.jtte.2024.04.008

Vikas Kumar , Erdem Coleri , Ihsan Obaid

Moisture damage in asphalt mixtures can cause early cracking and rutting failures due to the internal damage accumulated by the high internal pore pressures created at the aggregate-binder interface and/or within the binder phase by heavy traffic loads. Tensile strength ratio (TSR) test results have not been effective indicators of moisture susceptibility of the asphalt mixtures. Therefore, a reliable moisture conditioning method and moisture susceptibility test need to be developed and implemented to determine the possible long-term impact of several new additive technologies on pavement longevity. In this study, different tests and conditioning methods for moisture susceptibility quantification of asphalt mixtures were evaluated, and a new test method incorporating a color measuring device was also developed that could identify the impact of different anti-stripping agents and warm-mix additives on moisture susceptibility of asphalt mixtures. Results indicated that the moisture-induced stress tester (MIST) conditioned and vacuum conditioned samples showed similar susceptibility towards rutting and moisture. Moreover, the CT-index parameter was not found to correlate with the moisture susceptibility of the mixes. Based on the results of the laboratory investigations, this study recommends the use of a colorimeter in conjunction with the current TSR method to determine the adhesion and cohesion-related moisture susceptibility.

沥青混合料中的水分损伤会导致早期开裂和车辙失效，这是由于在集料-粘结剂界面和/或在重型交通荷载的粘结剂阶段产生的高内部孔隙压力所累积的内部损伤。抗拉强度比（TSR）试验结果并不是沥青混合料水敏感性的有效指标。因此，需要开发和实施一种可靠的水分调节方法和水分敏感性试验，以确定几种新添加剂技术对路面寿命可能产生的长期影响。本研究对沥青混合料湿敏感性量化的不同测试方法和调节方法进行了评价，并开发了一种结合颜色测量装置的新测试方法，可以识别不同抗剥离剂和温混合料添加剂对沥青混合料湿敏感性的影响。结果表明，湿致应力试验（MIST）条件下和真空条件下样品对车辙和水分的敏感性相似。此外，ct指数参数与混合料的水敏感性没有相关性。根据实验室调查的结果，本研究建议使用色度计结合当前的TSR方法来确定粘附性和粘聚性相关的水分敏感性。

{"title":"Innovative methods for quantifying the moisture susceptibility of asphalt mixtures","authors":"Vikas Kumar , Erdem Coleri , Ihsan Obaid","doi":"10.1016/j.jtte.2024.04.008","DOIUrl":"10.1016/j.jtte.2024.04.008","url":null,"abstract":"<div><div>Moisture damage in asphalt mixtures can cause early cracking and rutting failures due to the internal damage accumulated by the high internal pore pressures created at the aggregate-binder interface and/or within the binder phase by heavy traffic loads. Tensile strength ratio (TSR) test results have not been effective indicators of moisture susceptibility of the asphalt mixtures. Therefore, a reliable moisture conditioning method and moisture susceptibility test need to be developed and implemented to determine the possible long-term impact of several new additive technologies on pavement longevity. In this study, different tests and conditioning methods for moisture susceptibility quantification of asphalt mixtures were evaluated, and a new test method incorporating a color measuring device was also developed that could identify the impact of different anti-stripping agents and warm-mix additives on moisture susceptibility of asphalt mixtures. Results indicated that the moisture-induced stress tester (MIST) conditioned and vacuum conditioned samples showed similar susceptibility towards rutting and moisture. Moreover, the CT-index parameter was not found to correlate with the moisture susceptibility of the mixes. Based on the results of the laboratory investigations, this study recommends the use of a colorimeter in conjunction with the current TSR method to determine the adhesion and cohesion-related moisture susceptibility.</div></div>","PeriodicalId":47239,"journal":{"name":"Journal of Traffic and Transportation Engineering-English Edition","volume":"12 2","pages":"Pages 301-318"},"PeriodicalIF":7.4,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143887005","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

An intelligent bridge multi-dimension deflection IoT monitoring system based on laser datum and imaging 基于激光基准和成像的智能桥梁多维挠度物联网监测系统

IF 7.4 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Traffic and Transportation Engineering-English Edition

Pub Date : 2025-04-01 Epub Date: 2025-04-03 DOI: 10.1016/j.jtte.2023.06.006

Dan Zhao , Huifeng Wang , Hao Du , Haoyi Cheng , Lu Peng , Yaru Liang , He Huang , Yunmeng Li

Aiming at the all-weather automatic monitoring of bridge structure health monitoring, an embedded bridge multi-dimensional (horizontal and vertical) deflection monitoring system based on dual laser references is proposed. The controller turns on the laser reference transmitter through instructions to emit the laser reference. The intelligent target system located in the middle of the span will calculate the multi-dimensional deflection and deformation information of the bridge structure according to the laser spot projected on the diffuse optical target, and pass this information through the wireless network communication unit transmits to the cloud platform to realize real-time monitoring of the bridge structure status and other parameters. Through the laboratory platform, it is found that the measurement error of this method is less than 300 μm, and the data update rate is less than 66 ms, which meets the requirements of bridge structural health monitoring. This method solves the problem of low efficiency of artificial bridge deflection monitoring, realizes all-weather online real-time monitoring of bridge deflection detection, and ensures the accuracy and efficiency of the measurement system. Applying this monitoring technology not only significantly improves the efficiency and accuracy of bridge structural health monitoring but also plays a crucial role in ensuring safe bridge operations, extending the service life of bridges, and reducing maintenance costs.

针对桥梁结构健康监测的全天候自动监测，提出了一种基于双激光参考的嵌入式桥梁多维（水平和垂直）挠度监测系统。控制器通过指令开启激光基准发射器发射激光基准。位于跨距中间的智能目标系统将根据投射在漫射光目标上的激光光斑计算桥梁结构的多维挠度和变形信息，并将这些信息通过无线网络通信单元传输到云平台，实现对桥梁结构状态等参数的实时监控。通过实验平台，发现该方法的测量误差小于300 μm，数据更新速率小于66 ms，满足桥梁结构健康监测的要求。该方法解决了人工桥梁挠度监测效率低的问题，实现了桥梁挠度检测全天候在线实时监测，保证了测量系统的准确性和高效性。应用该监测技术，不仅可以显著提高桥梁结构健康监测的效率和准确性，而且对保证桥梁安全运行、延长桥梁使用寿命、降低维修成本具有至关重要的作用。

{"title":"An intelligent bridge multi-dimension deflection IoT monitoring system based on laser datum and imaging","authors":"Dan Zhao , Huifeng Wang , Hao Du , Haoyi Cheng , Lu Peng , Yaru Liang , He Huang , Yunmeng Li","doi":"10.1016/j.jtte.2023.06.006","DOIUrl":"10.1016/j.jtte.2023.06.006","url":null,"abstract":"<div><div>Aiming at the all-weather automatic monitoring of bridge structure health monitoring, an embedded bridge multi-dimensional (horizontal and vertical) deflection monitoring system based on dual laser references is proposed. The controller turns on the laser reference transmitter through instructions to emit the laser reference. The intelligent target system located in the middle of the span will calculate the multi-dimensional deflection and deformation information of the bridge structure according to the laser spot projected on the diffuse optical target, and pass this information through the wireless network communication unit transmits to the cloud platform to realize real-time monitoring of the bridge structure status and other parameters. Through the laboratory platform, it is found that the measurement error of this method is less than 300 μm, and the data update rate is less than 66 ms, which meets the requirements of bridge structural health monitoring. This method solves the problem of low efficiency of artificial bridge deflection monitoring, realizes all-weather online real-time monitoring of bridge deflection detection, and ensures the accuracy and efficiency of the measurement system. Applying this monitoring technology not only significantly improves the efficiency and accuracy of bridge structural health monitoring but also plays a crucial role in ensuring safe bridge operations, extending the service life of bridges, and reducing maintenance costs.</div></div>","PeriodicalId":47239,"journal":{"name":"Journal of Traffic and Transportation Engineering-English Edition","volume":"12 2","pages":"Pages 269-287"},"PeriodicalIF":7.4,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143887003","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Long tunnel group driving fatigue detection model based on XGBoost algorithm 基于XGBoost算法的长隧道群行驶疲劳检测模型

IF 7.4 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Traffic and Transportation Engineering-English Edition

Pub Date : 2025-02-01 Epub Date: 2025-01-11 DOI: 10.1016/j.jtte.2023.02.008

Huazhi Yuan , Kun Zhao , Ying Yan , Li Wan , Zhending Tian , Xinqiang Chen

Driving fatigue is one of the important causes of accidents in tunnel (group) sections. In this paper, in order to effectively identify the driving fatigue of tunnel (group) drivers, an eye tracker and other instruments were used to conduct real vehicle tests on long tunnel (group) expressways and thus obtain the eye movement, driving duration, and Karolinska sleepiness scale (KSS) data of 30 drivers. The impacts of the tunnel and non-tunnel sections on drivers were compared, and the relationship between blink indexes, such as the blink frequency, blink duration, mean value of blink duration, driving duration, and driving fatigue, was studied. A paired t-test and a Spearman correlation test were performed to select the indexes that can effectively characterize the tunnel driving fatigue. A driving fatigue detection model was then developed based on the XGBoost algorithm. The obtained results show that the blink frequency, total blink duration, and mean value of blink duration gradually increase with the deepening of driving fatigue, and the mean value of blink duration is the most sensitive in the tunnel environment. In addition, a significant correlation exists between the driving duration index and driving fatigue, which can provide a reference for improving the tunnel safety. Using the mean value of blink duration and driving duration as the characteristic indexes, the accuracy of the driving fatigue detection model based on the XGBoost algorithm reaches 98%. The cumulative and continuous tunnel proportion effectively estimates the driving fatigue state in a long tunnel (group) environment.

驾驶疲劳是隧道（群）段事故发生的重要原因之一。为了有效识别隧道（群）驾驶员的驾驶疲劳，本文利用眼动仪等仪器在长隧道（群）高速公路上进行了实车试验，获得了30名驾驶员的眼动、驾驶持续时间和Karolinska sleepiness scale （KSS）数据。比较了隧道路段和非隧道路段对驾驶员的影响，研究了眨眼次数、眨眼持续时间、眨眼平均时间、驾驶持续时间、驾驶疲劳等眨眼指标之间的关系。通过配对t检验和Spearman相关检验，选择能够有效表征隧道驾驶疲劳的指标。建立了基于XGBoost算法的驾驶疲劳检测模型。结果表明，随着驾驶疲劳程度的加深，驾驶员的眨眼频率、总眨眼持续时间和眨眼持续时间均值逐渐增加，其中眨眼持续时间均值在隧道环境中最为敏感。此外，行车持续时间指标与行车疲劳之间存在显著的相关关系，可为提高隧道安全性提供参考。以眨眼时间均值和行驶时间均值为特征指标，基于XGBoost算法的驾驶疲劳检测模型准确率达到98%。累积和连续隧道比例可以有效地估计长隧道（群）环境下的行车疲劳状态。

{"title":"Long tunnel group driving fatigue detection model based on XGBoost algorithm","authors":"Huazhi Yuan , Kun Zhao , Ying Yan , Li Wan , Zhending Tian , Xinqiang Chen","doi":"10.1016/j.jtte.2023.02.008","DOIUrl":"10.1016/j.jtte.2023.02.008","url":null,"abstract":"<div><div>Driving fatigue is one of the important causes of accidents in tunnel (group) sections. In this paper, in order to effectively identify the driving fatigue of tunnel (group) drivers, an eye tracker and other instruments were used to conduct real vehicle tests on long tunnel (group) expressways and thus obtain the eye movement, driving duration, and Karolinska sleepiness scale (KSS) data of 30 drivers. The impacts of the tunnel and non-tunnel sections on drivers were compared, and the relationship between blink indexes, such as the blink frequency, blink duration, mean value of blink duration, driving duration, and driving fatigue, was studied. A paired <em>t</em>-test and a Spearman correlation test were performed to select the indexes that can effectively characterize the tunnel driving fatigue. A driving fatigue detection model was then developed based on the XGBoost algorithm. The obtained results show that the blink frequency, total blink duration, and mean value of blink duration gradually increase with the deepening of driving fatigue, and the mean value of blink duration is the most sensitive in the tunnel environment. In addition, a significant correlation exists between the driving duration index and driving fatigue, which can provide a reference for improving the tunnel safety. Using the mean value of blink duration and driving duration as the characteristic indexes, the accuracy of the driving fatigue detection model based on the XGBoost algorithm reaches 98%. The cumulative and continuous tunnel proportion effectively estimates the driving fatigue state in a long tunnel (group) environment.</div></div>","PeriodicalId":47239,"journal":{"name":"Journal of Traffic and Transportation Engineering-English Edition","volume":"12 1","pages":"Pages 167-179"},"PeriodicalIF":7.4,"publicationDate":"2025-02-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143479342","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}

引用次数: 0