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Investigation on the mechanism and rheological properties of phosphogypsum whisker composite modified asphalt 磷石膏晶须复合改性沥青的机理及流变性能研究
IF 6.8 2区 工程技术 Q1 ENGINEERING, CIVIL Pub Date : 2026-02-01 Epub Date: 2026-01-07 DOI: 10.1016/j.jtte.2024.05.007
Peng Yin, Baofeng Pan, Zihan Li
In the domain of sustainable construction, the practice of integrating recycled solid waste into asphalt pavements has emerged as a critical innovation over recent years. This approach not only contributes to environmental sustainability but also enhances the structural stability of pavements. The unique physical and chemical properties of solid waste contribute substantially to improving both the temperature stability and fatigue resistance of asphalt, which are vital for the long-term durability and functionality of asphalt pavements. By enhancing these characteristics, the use of solid waste extends the operational life of asphalt pavements and optimizes the use of recycled materials in construction. This study used phosphogypsum whisker (PSW) as the main material to develop a composite modifier (MPM) for modifying virgin asphalt. The impact of varying levels of modifier on the aging resistance and rheological behavior of asphalt was explored using the rolling thin film oven test (RTFOT) along with various rheological evaluations. Additionally, the role of MPM in modifying asphalt was examined through a series of microscopic examinations. Findings indicated that the advanced composite modification technique significantly enhanced the dispersion of MPSW throughout the asphalt matrix. With MPM dosage below 6%, there was a noticeable improvement in the thermal and mechanical performance of the virgin asphalt, along with increased resistance to rutting, unaffected by aging. This improvement also contributed to an extension of the fatigue life of asphalt within specific strain limits. Furthermore, the physical integration of MPM with the virgin asphalt markedly boosted its thermal stability. A quantitative model analyzing MPM dosage was developed, aiming to serve as a guideline for the integration of PSW into asphalt pavements.
在可持续建筑领域,近年来,将回收的固体废物整合到沥青路面中已经成为一项重要的创新。这种方法不仅有助于环境的可持续性,而且还提高了路面的结构稳定性。固体废物独特的物理和化学性质大大有助于提高沥青的温度稳定性和抗疲劳性,这对沥青路面的长期耐久性和功能性至关重要。通过提高这些特性,固体废物的使用延长了沥青路面的使用寿命,并优化了建筑中回收材料的使用。本研究以磷石膏晶须(PSW)为主要材料,研制了一种复合改性剂(MPM),用于改性原生沥青。通过滚动薄膜烘箱试验(RTFOT)和各种流变学评价,探讨了不同水平的改性剂对沥青抗老化性能和流变性能的影响。此外,通过一系列微观检查,考察了MPM在沥青改性中的作用。结果表明,先进的复合改性技术显著增强了MPSW在沥青基体中的分散。当MPM掺量低于6%时,原始沥青的热力学性能得到明显改善,抗车辙性能增强,不受老化影响。这种改进也有助于延长沥青在特定应变范围内的疲劳寿命。此外,MPM与原始沥青的物理结合显著提高了其热稳定性。建立了MPM掺量定量分析模型,旨在为PSW与沥青路面的整合提供指导。
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引用次数: 0
Assessment of the effect of temperature variations in falling weight deflectometer deflections for full-depth asphalt pavements 温度变化对全深度沥青路面降重挠度计挠度影响的评价
IF 6.8 2区 工程技术 Q1 ENGINEERING, CIVIL Pub Date : 2026-02-01 Epub Date: 2026-01-07 DOI: 10.1016/j.jtte.2024.10.005
Pablo Orosa , Bongsuk Park , Seonghwan Cho , John E. Haddock
Pavement surface deflections collected from falling weight deflectometer (FWD) tests are widely used to estimate in-service pavement structural conditions and aid in pavement management systems. However, asphalt pavement deflections are affected by variations in temperature due to the viscoelastic nature of asphalt. This study evaluated the temperature effects on field FWD deflections performed at two different temperatures on the same day on three Indiana full-depth asphalt pavement sections. A parametric study was performed using a finite element (FE) model validated by field FWD data. Three different subgrade conditions and seven temperature gradients were simulated using the FE model. Field- and model-based FWD deflections were used to evaluate the accuracy of the AASTHO 1993 temperature correction method. It was found that the AASHTO 1993 method may be insufficient to fully consider the temperature effects on FWD deflections. In addition to temperature changes, the deflection level was found to be a major parameter in the variation of FWD deflections. Higher deflection levels showed higher deflection variation and lower AASHTO 1993 correction method accuracy.
从下落重量偏转计(FWD)试验中收集的路面表面偏转被广泛用于估计在役路面结构状况,并有助于路面管理系统。然而,由于沥青的粘弹性,沥青路面的挠度受到温度变化的影响。本研究评估了温度对当天两种不同温度下在印第安纳州三段全深度沥青路面上进行的现场FWD偏转的影响。采用经现场FWD数据验证的有限元模型进行了参数化研究。利用有限元模型模拟了3种不同的路基条件和7种温度梯度。采用基于场和模型的FWD偏转对AASTHO 1993温度校正方法的精度进行了评价。发现AASHTO 1993方法可能不足以充分考虑温度对FWD挠度的影响。除了温度变化外,挠度水平也是影响FWD挠度变化的主要参数。挠度水平越高,挠度变化越大,AASHTO 1993校正方法精度越低。
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引用次数: 0
Development of intelligent road markings: A review and outlook 智能道路标线的发展:回顾与展望
IF 6.8 2区 工程技术 Q1 ENGINEERING, CIVIL Pub Date : 2026-02-01 Epub Date: 2026-01-06 DOI: 10.1016/j.jtte.2024.05.006
Rui He , Qiaoyan Shang , Xiaosong Lu , Xin Lu , Wanjiang Guo , Jianyou Zhao
This study reviews and extends intelligent road marking systems (IRMS) by integrating advanced marking materials, sensing and detection, wireless transmission, and road-side energy provisioning to support real-time, interactive traffic information for vehicles and pedestrians. In response to emerging intelligent transportation system (ITS) requirements, we synthesize progress in passive and active road-marking materials, emphasizing that environmentally resilient active markings are critical for maintaining visibility and guidance at night and under adverse weather. We discuss how visual guidance and embedded/roadside sensors can enhance traffic-state acquisition and enable intelligent feedback. For communications, we compare candidate protocols and show that configurable rate, distance, and access sequencing can be tailored to different latency and capacity demands; hybrid communication schemes can further improve efficiency while reducing system cost. For energy supply, we evaluate pavement-based energy harvesting and other self-power options, identifying durability and economic viability as prerequisites for long-term deployment across diverse road conditions. Building on these elements, we propose an adaptable IRMS architecture and introduce a conceptual framework for a real-time dynamic variable-lane system. We highlight implications for traffic safety, efficiency, and sustainability, and outline research priorities on resilient active materials, protocol optimization for seamless V2X integration, and lifecycle assessments of energy harvesters. Remaining challenges include standardization, interoperability, cybersecurity, and lifecycle sustainability. Overall, strategic advances in materials, communication, and energy technologies can accelerate multifunctional IRMS and promote safer, more efficient, and sustainable ITS development.
本研究通过整合先进的标记材料、传感和检测、无线传输和路边能源供应来回顾和扩展智能道路标记系统(IRMS),以支持车辆和行人的实时、交互式交通信息。为了应对新兴的智能交通系统(ITS)需求,我们综合了被动和主动道路标记材料的进展,强调环境弹性主动标记对于在夜间和恶劣天气下保持能见度和引导至关重要。我们讨论了视觉引导和嵌入式/路边传感器如何增强交通状态采集和实现智能反馈。对于通信,我们比较了候选协议,并表明可配置的速率、距离和访问顺序可以根据不同的延迟和容量需求进行定制;混合通信方案可以进一步提高效率,同时降低系统成本。对于能源供应,我们评估了基于路面的能量收集和其他自供电方案,确定了耐久性和经济可行性,作为在不同道路条件下长期部署的先决条件。在这些元素的基础上,我们提出了一个适应性强的IRMS架构,并引入了一个实时动态变车道系统的概念框架。我们强调了对交通安全、效率和可持续性的影响,并概述了弹性活性材料、V2X无缝集成协议优化以及能源采集器生命周期评估的研究重点。剩下的挑战包括标准化、互操作性、网络安全和生命周期可持续性。总体而言,材料、通信和能源技术的战略进步可以加速多功能IRMS,促进更安全、更高效和可持续的ITS发展。
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引用次数: 0
A spatial multi-criteria approach to support the participatory design of a network for e-scooters 支持电动滑板车网络参与式设计的空间多标准方法
IF 6.8 2区 工程技术 Q1 ENGINEERING, CIVIL Pub Date : 2026-02-01 Epub Date: 2026-01-06 DOI: 10.1016/j.jtte.2024.12.006
Michela Le Pira , Martina Fazio , Nadia Giuffrida , Elena Cocuzza , Giuseppe Inturri , Matteo Ignaccolo
Micromobility and, in particular, e-scooter adoption, is rapidly spreading worldwide as an effective transport mode for short trips and for the last-mile to transit access. However, the pace of growth of micromobility is not followed by an adequate planning and development of suitable infrastructures. This is particularly needed in car-oriented cities with scarce spaces for active modes. Besides, the difference between bicycles and new e-scooters makes it important to rethink about traditional infrastructure layout and design. To address these challenges, this paper proposes a combined spatial and multi-criteria approach designed to identify priority criteria and paths for e-scooters in urban areas, considering user preferences. The case study is Catania (Italy), and the focus is on university student's mobility patterns and preferences. The methodology consists of a participatory approach involving university students in the selection of criteria and employing a survey leveraging pairwise comparisons of different criteria to unveil their preferences. The analytic hierarchy process (AHP) method was chosen to obtain criteria weights and use them in determining priority locations for e-scooter infrastructures through a geographic information system (GIS) analysis. By incorporating user preferences and considering spatial factors, this approach aims to facilitate the efficient integration of e-scooters into urban environments. The insights gained from this analysis can contribute to the planning of dedicated infrastructures and offer practical implications for the sustainable development of micromobility systems.
微型交通工具,特别是电动滑板车的采用,作为短途旅行和最后一英里过境的有效交通方式,正在全球迅速蔓延。然而,微流动性的增长速度并没有伴随适当的基础设施的充分规划和发展。这在以汽车为主的城市尤其需要,因为主动模式的空间很少。此外,自行车和新型电动滑板车之间的差异使得重新思考传统基础设施的布局和设计变得非常重要。为了应对这些挑战,本文提出了一种结合空间和多标准的方法,旨在根据用户偏好确定城市地区电动滑板车的优先标准和路径。案例研究是卡塔尼亚(意大利),重点是大学生的流动模式和偏好。该方法包括一种参与式方法,让大学生参与选择标准,并采用一项利用不同标准的两两比较来揭示他们的偏好的调查。采用层次分析法(AHP),通过地理信息系统(GIS)分析,确定电动滑板车基础设施的优先位置。通过结合用户偏好和考虑空间因素,这种方法旨在促进电动滑板车与城市环境的有效融合。从这一分析中获得的见解可以有助于规划专用基础设施,并为微移动系统的可持续发展提供实际意义。
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引用次数: 0
Modeling pedestrian-vehicle interactions at unsignalized mid-block crosswalk under automated vehicle mixed traffic flow conditions: An agent-based approach 自动车辆混合交通流条件下无信号中间街区人行横道行人-车辆交互建模:基于智能体的方法
IF 6.8 2区 工程技术 Q1 ENGINEERING, CIVIL Pub Date : 2026-02-01 Epub Date: 2026-01-06 DOI: 10.1016/j.jtte.2024.05.005
Haojie Li , Binyue Zhao , Ziqian Zhang , Yingheng Zhang , Gang Ren
The introduction of automated vehicles (AVs) is expected to improve the safety and traffic efficiency of the transportation system. However, the impacts of AVs on pedestrian-vehicle interactions (PVIs) remain unclear, especially under the mixed traffic flow condition with AVs and conventional vehicles (CVs). The objective of this paper is to investigate PVIs under AV mixed traffic flow at unsignalized mid-block crosswalk (UMC) where the right of way competition exists and the traffic conditions are more complex. An agent-based simulation model is proposed to evaluate the safety and traffic efficiency under a diverse range of different scenarios. Some agents’ behavioral parameters are calibrated from trajectory and video data collected at two sites in Nanjing. The proposed model is also validated by comparing post-encroachment time (PET) and pedestrian waiting time outputted from simulation with those extracted from empirical data. The simulation results suggest that the introduction of AVs has limited effect on both safety and efficiency levels at UMC under the low AV penetration rate. Compared to the negotiated yielding strategy of AVs, the conservative yielding strategy performs better in terms of pedestrian safety, but worse in improving traffic efficiency. Moreover, the results reveal that pedestrian and vehicle volumes, the proportion of pedestrians familiar with AVs, and the proportion of risk-prone pedestrians could significantly affect the safety and efficiency levels at UMC. Lastly, we provide some practical recommendations for determining treatments for mid-block crosswalks with AV mixed traffic flow to improve pedestrian safety and traffic efficiency.
自动驾驶汽车(av)的引入有望提高交通系统的安全性和交通效率。然而,自动驾驶汽车对行人-车辆交互作用的影响尚不清楚,特别是在自动驾驶汽车与传统车辆混合交通流条件下。本文的目的是研究自动驾驶汽车混合交通流下存在路权竞争且交通条件更为复杂的无信号中街区人行横道(UMC)的PVIs。提出了一种基于智能体的仿真模型,以评估不同场景下的交通安全和交通效率。根据南京两个地点收集的轨迹和视频数据,校准了一些agent的行为参数。通过将仿真结果与经验数据进行对比,验证了模型的有效性。仿真结果表明,在自动驾驶汽车普及率较低的情况下,自动驾驶汽车的引入对UMC的安全性和效率水平的影响有限。与自动驾驶汽车协商让行策略相比,保守让行策略在行人安全方面表现较好,但在提高交通效率方面表现较差。此外,研究结果还表明,行人和车辆数量、熟悉自动驾驶汽车的行人比例以及易发生风险的行人比例会显著影响UMC的安全和效率水平。最后,对自动驾驶汽车混合交通流中街区人行横道的处理方法提出了一些实用建议,以提高行人安全和交通效率。
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引用次数: 0
Long COVID in the context of driving styles: An empirical study employing connected vehicle trajectory data 驾驶风格下的长冠状病毒:基于网联车辆轨迹数据的实证研究
IF 6.8 2区 工程技术 Q1 ENGINEERING, CIVIL Pub Date : 2026-02-01 Epub Date: 2026-01-06 DOI: 10.1016/j.jtte.2025.11.001
Vishal C. Kummetha, Amin Mohammadnazar, Sisinnio Concas, Achilleas Kourtellis
This manuscript examines the “long-COVID” phenomenon, defined for this study as lasting changes in driving behavior stemming from pandemic-induced travel restrictions, particularly statewide stay-at-home orders that limited trips to curb virus transmission. Two tailored studies analyzed paneled connected vehicle (CV) data over four years to understand driving style changes and identify susceptible individuals. Study one employed mixed-effects logistic regression to find that drivers active on freeways are more likely to change their driving style than those on arterials. Additionally, drivers aged 56 and over are more likely to experience changes to driving styles as compared to other age groups. Study two utilized random intercept hierarchical modeling and reveals significant increases in volatility measures, derived from speed, acceleration, jerk, and yaw rate, associated with more aggressive driving on both arterial and freeway segments in the post-lockdown period. The analysis suggests that driving styles have not fully returned to pre-pandemic levels. The rise in risky and aggressive driving behaviors during and post COVID-19 can be mainly attributed to the observed drastic changes in traffic conditions, such as shifts in trip patterns and volumes over a short period, requiring drivers to rapidly adjust their driving style to the evolving dynamics.
本文研究了“长covid”现象,该现象在本研究中被定义为由于大流行引起的旅行限制,特别是全州范围内限制旅行以遏制病毒传播的居家令,导致驾驶行为的持久变化。两项量身定制的研究分析了四年来面板互联汽车(CV)的数据,以了解驾驶风格的变化并识别易受影响的个体。研究一采用混合效应逻辑回归发现,活跃在高速公路上的驾驶员比活跃在主干道上的驾驶员更容易改变他们的驾驶风格。此外,与其他年龄组相比,56岁及以上的司机更有可能经历驾驶风格的变化。研究二利用随机截距分层模型,揭示了在封城后,主干道和高速公路路段上更激进的驾驶行为显著增加了由速度、加速度、颠簸和偏航率得出的波动性指标。分析表明,驾驶风格尚未完全恢复到大流行前的水平。新冠肺炎疫情期间和疫情后,危险和攻击性驾驶行为的增加主要归因于观察到的交通状况的急剧变化,如出行模式和数量在短时间内发生变化,要求驾驶员迅速调整驾驶风格以适应不断变化的动态。
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引用次数: 0
Comparative analysis of nighttime pavement marking perception among drivers of different ages: A real-world driving study 不同年龄驾驶员夜间路面标志感知的比较分析:一项真实驾驶研究
IF 6.8 2区 工程技术 Q1 ENGINEERING, CIVIL Pub Date : 2026-02-01 Epub Date: 2026-01-06 DOI: 10.1016/j.jtte.2025.09.001
Aolin Yu , Jiangbi Hu , Ronghua Wang , Qingxin Hu , Yanyan Guan , Shangwen Qu , Ming Zhang
Pavement markings are essential for conveying lane boundaries, alignment, and other traffic information to drivers. Their visibility is closely tied to drivers' visual capabilities, which often decline with age. These age-related impairments can hinder drivers’ ability to perceive road markings at night, posing potential safety risks. To investigate age-related differences in nighttime perception of pavement markings, this study designed a real-world driving experiment using white pavement markings with nine levels of coefficient of retroreflected luminance (RL). A total of 360 preview distance observations were collected from 40 participants, including 14 young, 14 middle-aged, and 12 older adults. A generalized linear mixed model (GLMM) was employed to examine how RL, age, and gender influence nighttime preview distance. In addition, an age-stratified asymptotic regression model was developed to capture the nonlinear relationship between RL and preview distance. The results showed that: (1) RL was positively associated with preview distance, while age had a significant negative effect. Gender differences were not statistically significant. (2) There was no significant difference between young and middle-aged drivers, but old drivers had preview distances 14.7%–31.0% shorter under the same RL conditions. (3) At driving speeds between 60 and 100 km/h, the RL threshold required to ensure safe visibility for elderly drivers was 1.58–1.70 times higher than that for young to middle-aged drivers. These findings provide practical insights for transportation planners and policymakers in aging societies, highlighting the need for age-sensitive standards in pavement marking design to enhance nighttime driving safety for elderly road users.
路面标志对于向驾驶员传达车道边界、路线和其他交通信息至关重要。他们的能见度与司机的视觉能力密切相关,而视觉能力往往会随着年龄的增长而下降。这些与年龄有关的损伤会妨碍司机在夜间识别道路标志的能力,带来潜在的安全风险。为了研究夜间路面标志感知的年龄差异,本研究设计了一个真实驾驶实验,使用具有9个水平反射亮度系数的白色路面标志。共收集了40名参与者的360次预览距离观察,其中包括14名年轻人,14名中年人和12名老年人。采用广义线性混合模型(GLMM)研究RL、年龄和性别对夜间预览距离的影响。此外,建立了年龄分层渐近回归模型来捕捉RL与预览距离之间的非线性关系。结果表明:(1)RL与预习距离正相关,年龄与预习距离负相关。性别差异无统计学意义。(2)在相同RL条件下,青壮年驾驶员与中年驾驶员的预瞄距离无显著差异,而老年驾驶员的预瞄距离缩短14.7% ~ 31.0%。(3)在车速为60 ~ 100 km/h时,老年驾驶员为保证安全能见度所需的RL阈值是中青年驾驶员的1.58 ~ 1.70倍。这些研究结果为老龄化社会的交通规划者和政策制定者提供了实用的见解,强调了在道路标志设计中需要对年龄敏感的标准,以提高老年道路使用者的夜间驾驶安全。
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引用次数: 0
Exploring the role of wavelet decomposition order in deep learning-based network-wide traffic prediction 探讨小波分解顺序在基于深度学习的全网流量预测中的作用
IF 6.8 2区 工程技术 Q1 ENGINEERING, CIVIL Pub Date : 2026-02-01 Epub Date: 2026-01-07 DOI: 10.1016/j.jtte.2024.08.003
Mohammad Javad Hassanzada , Iuliia Yamnenko , Constantinos Antoniou
The performance level of traffic control systems highly relies on accurate short-term network-wide traffic prediction. Signal processing techniques have been widely integrated with deep learning algorithms for this purpose, but no study has focused on how the parameter of wavelet decomposition order (level) affects the prediction robustness given the training data limitations. This study proposes a hybrid framework for short-term network-wide traffic state prediction, which applies multi-layer perceptron (MLP) neural networks to implicitly capture the traffic network co-movement patterns. Then, the framework is complemented by a seasonal auto-regressive integrated moving average (SARIMA) model, extracting the location-specific features, including the local seasonality and stochastic disturbances. Besides, the hybrid framework is used to explore the association between the traffic prediction accuracy and wavelet decomposition order using an order-adaptive discrete haar wavelet transform (DHWT). The proposed method was validated over four open-access datasets with different training data characteristics in Paris and Madrid urban areas. The results indicated that the hybrid framework significantly improved the predictive accuracy of the benchmark deep learning algorithms. The forecasts for the low-resolution dataset experienced a noticeable improvement once higher wavelet orders were applied. The statistical analysis revealed the moderating effects of the training sample size and data spatial resolution on the link between the wavelet decomposition orders and the model predictive performance. Nevertheless, a combination of pre-processing order of two, and post-processing order of three led to satisfactory results in the cases where sufficient historical data were available.
流量控制系统的性能水平高度依赖于准确的短期全网流量预测。为此,信号处理技术已广泛地与深度学习算法相结合,但尚未有研究关注在训练数据受限的情况下,小波分解阶数(水平)参数对预测鲁棒性的影响。本研究提出了一种短期全网范围交通状态预测的混合框架,该框架应用多层感知器(MLP)神经网络隐式捕获交通网络的共同运动模式。然后,利用季节自回归综合移动平均(SARIMA)模型对该框架进行补充,提取地点特征,包括局部季节性和随机干扰。此外,采用自适应离散haar小波变换(DHWT),利用混合框架探讨了流量预测精度与小波分解阶数之间的关系。在巴黎和马德里市区四个具有不同训练数据特征的开放获取数据集上对该方法进行了验证。结果表明,混合框架显著提高了基准深度学习算法的预测精度。小波阶数越高,低分辨率数据集的预测效果越好。统计分析表明,训练样本量和数据空间分辨率对小波分解阶数与模型预测性能之间的关系有调节作用。然而,在有足够历史数据的情况下,两个预处理顺序和三个后处理顺序的组合可以得到令人满意的结果。
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引用次数: 0
Which factors compromise safety on mountainous roads: A systematic review 哪些因素会影响山区道路的安全性:一项系统综述
IF 6.8 2区 工程技术 Q1 ENGINEERING, CIVIL Pub Date : 2026-02-01 Epub Date: 2026-01-07 DOI: 10.1016/j.jtte.2024.09.013
Shivam Sharma , Pushpa Choudhary
Despite the complexity and high crash risk associated with driving on mountainous roads, there is a lack of comprehensive understanding of factors influencing driving performance and increasing risk of crashes on mountainous roads. To address this gap, this study conducts a systematic review by employing the preferred reporting items for systematic reviews and meta-analysis (PRISMA) technique and selected 54 papers for review. The study provides insights into various data collection approaches, including crash history-based studies, naturalistic driving studies, and simulator-based studies, and the performance measures used to analyze driving performance on mountainous roads, including various longitudinal, and lateral measures as well as crash probability. Additionally, the study explores different contributing factors, including drivers, highways, vehicles, and light and weather characteristics, which significantly influence driving performance on mountainous roads. The study reveals a strong correlation between highway characteristics, such as roadway geometry, traffic conditions, road markings, etc., and driving performance. Moreover, the findings highlight a significant impact of age, gender, and driving experience on driving performance. Most importantly, the study highlights significant gaps in literature, which may serve as guides for future research endeavors in safety assessment of mountainous roads. These gaps include absence of consideration of driver education, distraction, and prevalent highway features like sight distance and transition curve length. Furthermore, vehicle types including SUVs, and heavy vehicles have been overlooked in most studies to determine their impact on driving performance. Additionally, the study emphasized the importance of selecting and combining multiple performance measures for a more comprehensive analysis.
尽管山区道路驾驶的复杂性和高碰撞风险,但对影响驾驶性能和增加山区道路碰撞风险的因素缺乏全面的了解。为了解决这一差距,本研究采用系统评价和荟萃分析(PRISMA)技术进行了系统评价,并选择了54篇论文进行评价。该研究提供了各种数据收集方法的见解,包括基于碰撞历史的研究,自然驾驶研究和基于模拟器的研究,以及用于分析山区道路驾驶性能的性能测量,包括各种纵向和横向测量以及碰撞概率。此外,该研究还探讨了不同的影响因素,包括驾驶员、公路、车辆、光线和天气特征,这些因素对山区道路的驾驶性能有显著影响。该研究揭示了公路特征(如道路几何形状、交通状况、道路标记等)与驾驶性能之间存在很强的相关性。此外,研究结果还强调了年龄、性别和驾驶经验对驾驶表现的重大影响。最重要的是,本研究突出了文献中的重大空白,可以为今后山路安全评价的研究工作提供指导。这些差距包括缺乏对驾驶员教育的考虑,分心,以及常见的公路特征,如视线距离和过渡曲线长度。此外,在确定其对驾驶性能的影响时,大多数研究都忽略了包括suv和重型车辆在内的车辆类型。此外,该研究还强调了选择和组合多种绩效指标以进行更全面分析的重要性。
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引用次数: 0
Assessment on the environmental temperature variation induced temperature and strain effects inside cement concrete pavements based on long-term FBG monitoring information 基于光纤光栅长期监测信息的环境温度变化对水泥混凝土路面内部温度和应变效应的评价
IF 6.8 2区 工程技术 Q1 ENGINEERING, CIVIL Pub Date : 2026-02-01 Epub Date: 2026-01-07 DOI: 10.1016/j.jtte.2025.02.005
Yibin Wu , Guozhi Li , Sikai Wang , Ping Xiang , Huaping Wang
The internal information of pavement structure is difficult to be accurately obtained by mechanical theory due to the multimedia of component materials and the complex interfacial contacting conditions, and the lab tests are affected by model scale and simplification of loads. Therefore, it is of great significance to accurately obtain the internal information of the structure. The fiber Bragg grating (FBG) sensing technology has thus been adopted to monitor the long-term information of temperature fields and temperature variation induced strain inside the pavement structure. Based on the long-term monitoring data, statistical analysis aided with regression algorithms has been performed to establish the temperature prediction model at each depth of the cement concrete pavement. The results show a high quadratic polynomial correlation between pavement temperature and pavement depth. To confirm the effectiveness of the proposed models and techniques, finite element simulation analysis based on ABAQUS software is performed. The feasibility and accuracy of the developed pavement monitoring system for long-term continuous structural health monitoring is proved. The field data indicates that the heat transfer weakening effect due to the structural materials has a gradual lag in the time between the peaks and valleys of the temperatures at each layer of the structure. By analyzing the temperature variation induced strain field of the pavement structure, certain data references are provided for the preventive maintenance, design and construction of rigid pavement structures. The study provides scientific instructions for assess the performance of the pavement under long-term environmental temperature actions and efficient temperature prediction model for preventive control of the large temperature gradient induced deformation effect in rigid pavements in Gansu Province.
由于路面构件材料的多媒体化和界面接触条件的复杂性,路面结构的内部信息难以通过力学理论准确获取,且室内试验受模型尺度和荷载简化的影响。因此,准确获取结构的内部信息具有重要意义。因此,采用光纤布拉格光栅(FBG)传感技术监测路面结构内部温度场和温度变化引起的应变的长期信息。在长期监测数据的基础上,通过统计分析和回归算法建立了水泥混凝土路面各深度的温度预测模型。结果表明,路面温度与路面深度之间存在高度的二次多项式相关关系。为了验证所提模型和技术的有效性,基于ABAQUS软件进行了有限元仿真分析。验证了所开发的路面监测系统对结构长期连续健康监测的可行性和准确性。现场数据表明,结构材料的换热弱化效应在结构各层温度峰谷之间的时间上具有逐渐的滞后性。通过对路面结构温度变化引起的应变场的分析,为刚性路面结构的预防性维护、设计和施工提供一定的数据参考。该研究为评价长期环境温度作用下的路面性能提供了科学指导,为预防甘肃刚性路面大温度梯度引起的变形效应提供了有效的温度预测模型。
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Journal of Traffic and Transportation Engineering-English Edition
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