Journal of Traffic and Transportation Engineering-English Edition最新文献_第4页

Creep characteristics and constitutive model construction of offshore soft soils 近海软土蠕变特性及本构模型构建

IF 6.8 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Traffic and Transportation Engineering-English Edition

Pub Date : 2025-10-01 Epub Date: 2025-09-26 DOI: 10.1016/j.jtte.2022.12.004

Hainian Wang , Wenhua Zheng , Linlong Shao , Ponan Feng , Tongtong Wan , Heyang Ding

The main objective of this study was to investigate creep characteristics and construct a suitable constitutive model for soft soils in offshore areas. Soft soil samples were obtained to evaluate the physical and mechanical properties. Additionally, a triaxial creep test was conducted by applying different axial deviator stresses under three confining pressures to analyze the creep characteristics and establish a creep constitutive model suitable. It was found that the physical and mechanical properties of soft soils at different depths are significantly different, and the physical properties have a significant correlation with compression modulus and compression coefficient. The soft soils creep mainly present linear viscoelasticity under low axial stress, while it shows nonlinear viscoplasticity characteristics when the axial deviator stress is greater than the yield stress. The correlation coefficient R² of Merchant model fitting curves are significantly larger than that of Burgers model. The Burgers model fitting curves have a large deviation from the actual creep characteristics under smaller axial deviator stress and the parameters are also inconsistent with the internal creep mechanism. The Kelvin body in Merchant model can better simulate attenuation creep characteristics of soft soils, but it cannot exhibit nonlinear viscoplasticity creep characteristics. Furthermore, a combination of Merchant model and power function empirical model can dramatically characterize the linear viscoelasticity and nonlinear viscoplasticity creep behaviors of offshore soft soils, with a correlation coefficient above 0.94. Verification of the combined constitutive model indicates that it has excellent credibility and applicability in offshore areas.

本研究的主要目的是研究近海地区软土的蠕变特性，并建立合适的本构模型。获取软土样品，评价其物理力学性能。在三种围压条件下，通过施加不同的轴向偏应力，进行三轴蠕变试验，分析蠕变特性，建立合适的蠕变本构模型。研究发现，不同深度软土的物理力学性质存在显著差异，物理性质与压缩模量和压缩系数存在显著相关性。软土蠕变在低轴向应力下主要表现为线性粘弹性，当轴向偏应力大于屈服应力时表现为非线性粘塑性。Merchant模型拟合曲线的相关系数R2显著大于Burgers模型。在较小的轴向偏应力下，Burgers模型拟合曲线与实际蠕变特性偏差较大，参数也与内部蠕变机理不一致。Merchant模型中的Kelvin体能较好地模拟软土的衰减蠕变特性，但不能表现出非线性粘塑性蠕变特性。此外，Merchant模型与幂函数经验模型相结合可以较好地表征近海软土的线性粘弹性和非线性粘塑性蠕变行为，相关系数均在0.94以上。对该组合本构模型的验证表明，该组合本构模型具有良好的可信度和适用性。

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引用次数: 0

Mapping the knowledge domain of crash risk in older drivers studies: A scientometric analysis 绘制老年驾驶员研究中碰撞风险的知识域：科学计量学分析

IF 7.4 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Traffic and Transportation Engineering-English Edition

Pub Date : 2025-06-01 Epub Date: 2025-06-06 DOI: 10.1016/j.jtte.2024.05.002

Bingshuo Chen , Xiaohua Zhao , Yang Li , Xiaoming Liu

With the rapid global progression of population aging, the traffic safety of older drivers has emerged as a worldwide concern, resulting in a significant surge in the number of manuscripts on this subject. This study employed scientometric analysis to scrutinize 1652 original manuscripts concerning research on older drivers. To visually depict the current state of knowledge in the field, mapping knowledge domain (MKD) was employed for scientometric analysis, shedding light on the evolution of this research area. Firstly, a statistical analysis was conducted to scrutinize the development of research on older drivers. Secondly, VOSviewer was utilized for manuscript co-citation analysis, revealing five primary research topics: cognitive function and crash risk, visual processing impairment and crash risk, potential consequences of changes in driving patterns, involvement of older drivers in crashes, as well as identifying and enhancing factors contributing to unsafe driving. Thirdly, CitNetExplorer was applied to identify core publications and their reference relationships. Research predominantly focused on visual function, cognitive function, and physical health. Fourthly, VOSviewer's keyword co-citation analysis pinpointed research hotspots in the last five years concerning older drivers: driving risk factors, driving fitness evaluation, impact of distraction on driving, and impact of visual impairment on driving. Finally, based on the aforementioned discussions and the situation in China, some feasible research directions are proposed. This paper summarizes the overall trends in the study of older drivers and the risk factors for traffic accidents. These findings can serve as a reference for improving the driving and road traffic safety of older drivers.

随着全球人口老龄化的迅速发展，老年驾驶员的交通安全问题已经成为一个世界性的问题，导致这一主题的论文数量大幅增加。本研究采用科学计量学分析方法，对1652份有关老年司机研究的原始手稿进行了详细审查。为了直观地描述该领域的知识现状，我们采用知识图谱（mapping knowledge domain， MKD）进行科学计量分析，揭示了该研究领域的发展历程。首先，进行了统计分析，以审查老年司机研究的发展。其次，利用VOSviewer对论文进行共被引分析，揭示了五个主要研究课题：认知功能与碰撞风险、视觉加工损伤与碰撞风险、驾驶模式变化的潜在后果、老年驾驶员参与碰撞，以及识别和增强导致不安全驾驶的因素。第三，应用CitNetExplorer识别核心出版物及其参考文献关系。研究主要集中在视觉功能、认知功能和身体健康方面。第四，VOSviewer通过关键词共被引分析，精准定位了近5年关于老年驾驶员的研究热点：驾驶危险因素、驾驶健康评价、分心对驾驶的影响、视力障碍对驾驶的影响。最后，结合上述讨论和中国的实际情况，提出了一些可行的研究方向。本文总结了老年驾驶员研究的总体趋势和交通事故的危险因素。研究结果可为提高老年驾驶员的驾驶和道路交通安全水平提供参考。

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引用次数: 0

Fatigue damage rules of cement stabilized materials under the multi-scale perspective: Combined approach of simulations and measurements 多尺度下水泥稳定材料的疲劳损伤规律：模拟与测量相结合的方法

IF 7.4 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Traffic and Transportation Engineering-English Edition

Pub Date : 2025-06-01 Epub Date: 2025-06-05 DOI: 10.1016/j.jtte.2025.02.001

Kun Xi , Shi Dong , Hainian Wang , Xiaokang Zhao , Jinyi Jiang

Cement stabilized materials (CSM) are widely used in pavement base layers, where fatigue damage is inevitable throughout their service life. Due to their significant heterogeneity as multiphase composite materials, a multi-scale approach is essential for studying their fatigue damage. This paper aims to propose a combined approach of simulations and measurements. This approach can characterize the multiphase and heterogeneity properties of CSM and reveal their fatigue damage rules. Firstly, the strength and fatigue performance of CSM were tested, leading to the development of a macroscopic modulus fatigue damage model. Secondly, a pre- and post-fatigue test X-ray computed tomography method with maintained loading was developed to capture the internal meso-structure of CSM. The trainable Weka segmentation was used to provide an accurate meso-structure of CSM for discrete element model (DEM). Thirdly, microscopic testing results were utilized to calibrate the contact parameters of the DEM. The virtually generated aggregate methods for DEM were proposed to enrich the specimens. Finally, virtual fatigue tests were conducted to investigate the fatigue damage rules and to extend the macroscopic modulus fatigue damage model. The results revealed that the fatigue damage rules of CSM accumulate nonlinearly. From a macroscopic perspective, the decay in modulus follows an S-curve across three stages. From a mesoscopic perspective, the average radius coefficient of DEM bonded contacts decreases at an accelerating decay rate. The method proposed in this study reveals the fatigue damage rules under varying stress ratios and cement contents, and develops a simulation based fatigue life prediction equation of CSM. This study offers a reliable numerical technique for modeling and analyzing the fatigue damage rules of composite materials.

水泥稳定材料（CSM）广泛应用于路面基层，在其整个使用寿命中，疲劳损伤是不可避免的。由于其作为多相复合材料具有明显的非均质性，因此采用多尺度方法研究其疲劳损伤是必要的。本文旨在提出一种模拟与测量相结合的方法。该方法可以表征CSM的多相性和非均质性，揭示其疲劳损伤规律。首先，对CSM的强度和疲劳性能进行了测试，建立了宏观模量疲劳损伤模型。其次，建立了一种保持载荷的疲劳前后x射线计算机断层扫描方法来捕捉CSM的内部细观结构。采用可训练的Weka分割方法为离散元模型（DEM）提供精确的CSM细观结构。第三，利用微观测试结果对DEM的接触参数进行标定。提出了虚拟生成集合体的DEM方法，以丰富样本。最后进行虚拟疲劳试验，研究疲劳损伤规律，扩展宏观模量疲劳损伤模型。结果表明，CSM的疲劳损伤规律呈非线性累积。从宏观的角度来看，模量的衰减遵循三个阶段的s曲线。从介观角度看，DEM键合接触的平均半径系数以加速衰减速率减小。该方法揭示了不同应力比和水泥掺量下CSM的疲劳损伤规律，建立了基于仿真的CSM疲劳寿命预测方程。该研究为模拟和分析复合材料的疲劳损伤规律提供了可靠的数值方法。

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引用次数: 0

Effect of surface free energy and mix design parameters on low-temperature cracking of hot mix asphalt 表面自由能和配合比设计参数对热拌沥青低温开裂的影响

IF 7.4 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Traffic and Transportation Engineering-English Edition

Pub Date : 2025-06-01 Epub Date: 2025-06-04 DOI: 10.1016/j.jtte.2024.03.009

Gholam Hossein Hamedi, Javad Zarrinfam, Amir Hossein Asadi

Factors affecting the resistance of asphalt mixtures against low-temperature cracking are divided into three categories: pavement structure geometry, material properties, and environmental conditions. Most of the existing models for evaluating and predicting the resistance of asphalt mixtures against low-temperature cracking have focused more on environmental factors and pavement structure geometry. However, the impact of material properties has been neglected. The concepts of surface free energy (SFE) that focus on material properties have a high potential to assess different failures of asphalt mixtures. Accordingly, in this research, the effect of SFE parameters, along with mix design parameters and bitumen rheological properties, were studied on the resistance of asphalt mixture against low-temperature cracking using an artificial neural network (ANN) model. Two indicators of fracture energy and fracture toughness were considered as the criteria for the resistance of asphalt mixtures against low-temperature cracking which is measured by the semi-circular bending (SCB) test. The sensitivity analysis results of the models indicated a positive correlation between the resistance of asphalt mixtures against low-temperature cracking and independent variables, including the apparent film thickness (AFT) on the surface of the aggregate, the index of aggregate (Ia), adhesion free energy (AFE), the ratio of the base to acid component of the aggregates (base to acid), cohesion free energy (CFE), the specific surface area (SSA) of the aggregates, and the stress relaxation rate (m-value). Among the variables studied, bitumen creep stiffness had a reverse relationship with the resistance of asphalt mixtures against low-temperature cracking. In addition, the sensitivity analysis results based on normalized data illustrated that the AFT and m-value were the most significant parameters affecting the asphalt mixtures' resistance against low-temperature cracking.

影响沥青混合料抗低温开裂性能的因素分为三类：路面结构几何形状、材料性能和环境条件。现有的沥青混合料抗低温开裂性评价和预测模型大多侧重于环境因素和路面结构几何。然而，材料性能的影响一直被忽视。关注材料特性的表面自由能（SFE）概念在评估沥青混合料的不同失效方面具有很大的潜力。因此，本研究采用人工神经网络（ANN）模型研究了SFE参数、混合料设计参数和沥青流变特性对沥青混合料抗低温开裂性能的影响。以断裂能和断裂韧性两个指标作为衡量沥青混合料低温开裂性能的标准，通过半圆弯曲试验对其进行了测试。模型敏感性分析结果表明，沥青混合料抗低温开裂性能与集料表面表观膜厚（AFT）、集料指数（Ia）、附着自由能（AFE）、集料碱酸比（base to acid）、黏聚自由能（CFE）、集料比表面积（SSA）等自变量呈正相关。和应力松弛速率（m值）。在研究的变量中，沥青蠕变刚度与沥青混合料抗低温开裂性能成反比关系。此外，基于归一化数据的敏感性分析结果表明，AFT和m值是影响沥青混合料抗低温开裂性能最显著的参数。

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引用次数: 0

Precision salt application using advanced machine learning algorithms to achieve improved road safety and reduced environmental impacts 精密盐应用采用先进的机器学习算法，实现提高道路安全性，减少环境影响

IF 7.4 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Traffic and Transportation Engineering-English Edition

Pub Date : 2025-06-01 Epub Date: 2025-06-05 DOI: 10.1016/j.jtte.2024.11.004

Sepideh Emami Tabrizi, Jennifer Elizarov, Hani Farghaly, Bahram Gharabaghi

The application of de-icing salts to improve winter road safety, although necessary in cold climates, may adversely affect groundwater resources and degrade aquatic life in urban streams, if over-prescribed, and cause an increase in crash rates, if under-prescribed. The main objective of this research is to develop algorithms for precision salt application rate (SAR) using advanced machine learning methods to achieve the desired road safety with less adverse environmental effects. This study highlights the importance of accurate real-time monitoring of pavement surface temperature and meteorological variables (i.e., storm duration, hourly precipitation rate, and air temperature) as key factors in prescribing salt application rates during winter storm events. A new SAR model was trained/tested using a decade of historic salt application rates from a range of winter storm events on three different road classes. The application of this model can help road authorities to achieve greater road safety and reduce adverse environmental impacts, especially in the identified and mapped salt vulnerable areas.

为改善冬季道路安全而使用除冰盐虽然在寒冷气候下是必要的，但如果使用过量，可能会对地下水资源产生不利影响，并使城市溪流中的水生生物退化；如果使用不足，则可能导致撞车率增加。本研究的主要目的是利用先进的机器学习方法开发精确盐施用量（SAR）的算法，以实现所需的道路安全，减少不利的环境影响。该研究强调了准确实时监测路面温度和气象变量（即风暴持续时间、每小时降水率和气温）的重要性，它们是冬季风暴事件中规定施盐量的关键因素。一个新的SAR模型被训练/测试，使用十年来在三种不同道路上的一系列冬季风暴事件的历史盐施用量。该模型的应用可以帮助道路管理部门实现更大的道路安全，减少不利的环境影响，特别是在已确定和绘制的盐易损区。

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引用次数: 0

Perceived precipitation intensity prediction model based on simultaneous dynamic and static observations for evaluating weather impacts on vehicle applications 基于动态和静态同时观测的感知降水强度预测模型用于评估天气对车辆应用的影响

IF 7.4 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Traffic and Transportation Engineering-English Edition

Pub Date : 2025-06-01 Epub Date: 2025-06-04 DOI: 10.1016/j.jtte.2024.05.003

Wing Yi Pao , Long Li , Eric Villeneuve , Eric Whalls , Martin Agelin-Chaab , Ismail Gultepe , John Komar

Adverse weather conditions increase road risks; thus, weather testing is necessary to evaluate vehicle performance. Outdoor testing is the most realistic, but it is not as controlled, repeatable, and rapid as indoor testing using an artificial precipitation system. However, outdoor data is still desirable for establishing the simulation targets on the vehicle surfaces. The dynamic-to-static precipitation intensity ratio is a useful parameter to correlate natural precipitation with perceived precipitation experienced by the moving vehicle. Theoretically, the amount of precipitation experienced by a translating surface depends on the orientation and travel speed. However, there are other external factors that could affect the perceived intensity, such as wind, turbulence, and droplet size distribution (DSD). Therefore, the existing simplified models evaluating a number of droplet strikes or precipitation flux calculated using natural precipitation density fail to have accurate predictions of the perceived precipitation rate, which hinders the evaluation vehicle application performance, such as sensor perception. In the present work, a semi-empirical prediction model is developed from the physics of precipitation in the context of vehicle aerodynamics and atmospheric dynamics. This model is validated with outdoor testing on a track for three days with rainy conditions. Multiple optical disdrometers are used to evaluate the precipitation rate experienced by a moving vehicle at different surface orientations through meteorological observations obtained in real-time from a nearby stationary meteorological tower and a moving vehicle. The data acquisition and processing methods are presented in detail. Results suggested that the proposed model is found to improve the current simplified mathematical expressions and is repeatable. It is found that improvements in prediction accuracy of perceived precipitation intensity compared to existing methods are usually more than 50%.

恶劣的天气条件增加了道路风险；因此，天气测试是评估车辆性能的必要条件。室外测试是最现实的，但它不像使用人工降水系统的室内测试那样可控、可重复和快速。然而，为了在车辆表面建立仿真目标，仍然需要室外数据。动态与静态降水强度比是将自然降水与移动车辆所经历的感知降水相关联的有用参数。理论上，平动表面所经历的降水量取决于方向和移动速度。然而，还有其他外部因素可能影响感知强度，如风、湍流和液滴大小分布（DSD）。因此，现有的利用自然降水密度计算水滴撞击次数或降水通量的简化模型无法准确预测感知降水率，影响了对传感器感知等车辆应用性能的评价。在本工作中，从车辆空气动力学和大气动力学的角度出发，建立了降水的半经验预测模型。该模型在雨天的轨道上进行了为期三天的室外测试。利用多个光学测差仪，通过附近固定的气象塔和移动的车辆实时获得的气象观测数据，对移动车辆在不同地表方向上经历的降水率进行评估。详细介绍了数据采集和处理方法。结果表明，该模型改进了现有的简化数学表达式，具有可重复性。与现有方法相比，该方法对感知降水强度的预测精度通常提高50%以上。

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引用次数: 0

Inductive charging technology of asphalt pavement: A state-of-the-art review 沥青路面感应充电技术研究进展

IF 7.4 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Traffic and Transportation Engineering-English Edition

Pub Date : 2025-06-01 Epub Date: 2025-06-04 DOI: 10.1016/j.jtte.2024.03.008

Peifeng Cheng, Dayu Jiang, Yiming Li

The increasing adoption of new energy vehicles has promoted the alleviation of petroleum fuel consumption and environmental problems. The charging and endurance capability problems of these vehicles are main constraints for their further development. The intelligent e-Road pavements can provide wireless charging, presenting a potential solution to the above deficiencies. This paper systematically introduced the composition and working principle of wireless charging technology to advance its development and application. Moreover, the main influencing factors of electric energy transmission efficiency on e-Road concerning pavement materials were analysed. The findings showed that the electric energy passed through pavement layers when applying the existing wireless charging technologies that typically use air as the medium. As a result, the transmission efficiency fluctuated owing to various influencing factors, including pavement materials, layers and moisture. This phenomenon is attributed to the performance parameters of wireless charging coils and the power loss caused by the electromagnetic induction characteristics of dielectric pavement materials. Potential solutions for improving the power transmission efficiency of wireless charging pavements were proposed, considering the circuit composition, asphalt concrete gradation type, and pavement structural composition. The methods and models used in previous studies were summarised to evaluate the dielectric loss of asphalt mixtures, and the wireless energy transmission efficiency, application scope, and optimisation methods were put forward. The impact of a commonly used wireless charging coil layout on the structure and service life of wireless charging pavements was analysed, and improvement measures were suggested.

新能源汽车的日益普及促进了石油燃料消耗和环境问题的缓解。这些车辆的充电和续航能力问题是制约其进一步发展的主要因素。智能e-Road路面可以提供无线充电，为上述不足提供了一种潜在的解决方案。本文系统地介绍了无线充电技术的组成和工作原理，以促进无线充电技术的发展和应用。分析了影响e路电能传输效率的主要因素，包括路面材料。研究结果表明，当使用现有的无线充电技术（通常以空气为媒介）时，电能可以穿过路面层。因此，由于路面材料、层数、水分等多种因素的影响，透平效率会出现波动。这种现象归因于无线充电线圈的性能参数和介电路面材料的电磁感应特性造成的功率损耗。考虑到线路组成、沥青混凝土级配类型和路面结构组成，提出了提高无线充电路面输电效率的潜在解决方案。总结了以往研究沥青混合料介质损耗的方法和模型，提出了无线能量传输效率、应用范围和优化方法。分析了一种常用的无线充电线圈布置方式对无线充电路面结构和使用寿命的影响，并提出了改进措施。

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引用次数: 0

Research on static and dynamic comprehensive evaluation of urban agglomeration road network integration based on catastrophe theory 基于突变理论的城市群路网一体化静态与动态综合评价研究

IF 7.4 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Traffic and Transportation Engineering-English Edition

Pub Date : 2025-06-01 Epub Date: 2025-06-06 DOI: 10.1016/j.jtte.2023.01.007

Minqing Zhu , Wenyu Wang , Hongjun Cui , Yizhe Yang , Jiexi Chen , Jianling Gu , Fengyun Zhang

The integration of urban agglomeration road networks is an inevitable trend of regional development. It is very important to build a scientific and reasonable evaluation system for the integration of urban agglomeration road networks. The existing research may not be sufficient to evaluate the road network level reliably if the city unit in the region is not considered enough. It is necessary to evaluate the level of road network integration from a dynamic perspective, in consideration of the economic scale of urban population and the level of road network in developing countries such as China is in the stage of rapid development. Therefore, this paper constructs an analytic hierarchy process (AHP)-catastrophe progression method evaluation model by considering the equilibrium degree and the fitness degree of urban unit road network. This evaluation model combines the integration of road network quantity, shape, and quality to evaluate the level of urban agglomeration road network integration from dynamic and static ways. Taking Beijing–Tianjin–Hebei urban agglomeration and Yangtze River Delta urban agglomeration as examples, this paper uses the road network data of urban agglomerations in 2010, 2015, and 2020 to make a comparative study. The results show that the growing trend of Yangtze River Delta urban agglomeration is at a high level by 2020, while the trend of Beijing–Tianjin–Hebei urban agglomeration is at a general level. Compared with the previous evaluation models, this evaluation method has a good explanation and can emphasize the consideration of dynamic evaluation. The research results annotate the current situation of road network integration of Beijing–Tianjin–Hebei and Yangtze River Delta urban agglomeration that can satisfy the requirement of urban agglomeration development. And it provides decision-making reference for further optimizing of the road network planning and layout of urban agglomeration.

城市群道路网络一体化是区域发展的必然趋势。建立科学合理的城市群路网一体化评价体系具有十分重要的意义。如果对区域内的城市单元考虑不够充分，现有的研究可能不足以可靠地评价路网水平。考虑到中国等处于快速发展阶段的发展中国家城市人口的经济规模和路网水平，有必要从动态的角度来评价路网一体化水平。为此，本文构建了考虑城市单元路网均衡度和适应度的层次分析法-突变级数法评价模型。该评价模型结合路网数量、形态和质量的一体化，从动态和静态两方面评价城市群路网一体化水平。本文以京津冀城市群和长三角城市群为例，采用2010年、2015年和2020年城市群路网数据进行对比研究。结果表明：到2020年，长三角城市群增长趋势处于较高水平，京津冀城市群增长趋势处于一般水平；与以往的评价模型相比，该评价方法具有较好的解释性，能够强调对动态评价的考虑。研究结果说明了京津冀和长三角城市群路网一体化的现状，能够满足城市群发展的要求。为城市群路网规划布局的进一步优化提供决策参考。

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引用次数: 0

Driving safety of low-position lighting in highway tunnels based on visual performance 基于视觉性能的公路隧道低位照明行车安全

IF 7.4 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Traffic and Transportation Engineering-English Edition

Pub Date : 2025-06-01 Epub Date: 2025-06-04 DOI: 10.1016/j.jtte.2025.05.001

Rui Ren , Zhenzhi Xiao , Yaqiong Wang , Xiao Song

To evaluate the lighting environment quality and driving safety of low-position lighting in highway tunnels, this study simulated three lighting schemes (high-position, low-position, and low-position with auxiliary LED strips on maintaining road) using DIALux software for a two-lane unidirectional tunnel. Key parameters for low-position luminaires were optimized, and drivers' obstacle recognition reaction times, gaze distribution patterns and pupil diameter dynamics were tested by visual performance experiments. The results indicate that the optimal parameters for low-position lighting, when using flat light technology luminaires better adapted to low-position lighting, are as follows: lamp spacing of 6–7 m, mounting height of 1.1–1.3 m, staggered arrangement, and auxiliary lighting power of 1 W/m. Compared to high-position lighting, low-position lighting reduced the threshold increment by 47.1%, increased small target visibility by 569%, and shortened drivers’ reaction times for near-roadway obstacles by 25%, significantly enhancing obstacle recognition. The pupil diameter variation rates across different lighting configurations all below 10% indicate that low-position lighting did not induce psychological states of tension or discomfort during driving. Although low-position lighting exhibited slightly lower longitudinal uniformity and longer reaction times for elevated targets, these limitations were effectively resolved by auxiliary LED strips. Overall, low-position lighting substantially improves driving safety and comfort in highway tunnels.

为评价公路隧道低位照明的照明环境质量和行车安全性，本研究采用DIALux软件对某双车道单向隧道的高位、低位、低位辅助LED条养护三种照明方案进行了模拟。对低位置灯具关键参数进行优化，并通过视觉性能实验测试驾驶员障碍物识别反应时间、凝视分布模式和瞳孔直径动态。结果表明，采用更适合低位照明的平板灯技术灯具时，低位照明的最佳参数为：灯间距6 ~ 7 m，安装高度1.1 ~ 1.3 m，错开布置，辅助照明功率1 W/m。与高位照明相比，低位照明的阈值增量降低了47.1%，小目标可见度提高了569%，驾驶员对近路障碍物的反应时间缩短了25%，显著提高了障碍物识别能力。不同照明配置的瞳孔直径变化率均低于10%，表明低位置照明不会引起驾驶过程中的紧张或不适的心理状态。虽然低位置照明表现出稍低的纵向均匀性和较长的反应时间，但辅助LED灯条有效地解决了这些限制。总体而言，低位置照明大大提高了公路隧道的驾驶安全性和舒适性。

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引用次数: 0

Laboratory surface texture analysis of road pavements using a mobile phone camera based close-range photogrammetry technique 基于手机相机的近距离摄影测量技术的路面纹理实验室分析

IF 7.4 2区工程技术 Q1 ENGINEERING, CIVIL

Journal of Traffic and Transportation Engineering-English Edition

Pub Date : 2025-06-01 Epub Date: 2025-06-04 DOI: 10.1016/j.jtte.2024.12.004

Filippo Balzano , Piergiorgio Tataranni , David Woodward , Cesare Sangiorgi

The wearing course conditions strongly affect road pavements quality in terms of traffic safety and overall functionality. Surface texture can be considered a very strategic aspect to assess road pavement status, in order to predict its degradation and to define an effective maintenance program. Nowadays, common texture assessment approaches are mainly empirical and based on in-situ and/or laboratory direct measurements, thus the quantity and quality of the obtainable information are limited. On the other hand, advanced contactless techniques require expensive and often complicated equipment that can be hardly used in common applications. In this regard, a low budget close-range photogrammetry technique for road pavements 3D surface texture analysis is here proposed. 14 areal texture parameters including depth, volume, distribution and feature indicators have been determined by analysing the 3D models. The outcomes have been compared with those found with the traditional volumetric patch and pendulum tests, and a complete pairwise correlation matrix has been obtained. Volume patch test exhibits a high relationship with different volume and height surface texture parameters, while low-correlations have been found comparing pendulum test with the intrinsic and statistical indicators. The results and their relationships have been commented in-depth along with proposed further research activities.

路面的磨损状况对道路的交通安全和整体功能有很大的影响。表面纹理可以被认为是评估道路路面状况的一个非常重要的方面，以便预测其退化并制定有效的维护计划。目前，常见的纹理评价方法主要是基于现场和/或实验室直接测量的经验方法，因此可获得的信息数量和质量有限。另一方面，先进的非接触式技术需要昂贵且往往复杂的设备，这些设备很难在普通应用中使用。为此，本文提出了一种用于路面三维表面纹理分析的低成本近景摄影测量技术。通过对三维模型的分析，确定了包括深度、体积、分布和特征指标在内的14个面纹理参数。将所得结果与传统的体积贴片试验和摆试验结果进行了比较，得到了完整的两两相关矩阵。体积贴片试验与不同体积和高度表面纹理参数的相关性较高，而摆锤试验与内在指标和统计指标的相关性较低。对研究结果及其相互关系进行了深入评述，并提出了进一步的研究活动。

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