Transportation Engineering最新文献_第2页

Who rides the feeder? A multi-group SEM analysis of commuters’ intention to use paratransit as a feeder to a dedicated bus lane public transportation system 谁骑喂食器？通勤者使用辅助交通作为专用公交车道公共交通系统的接驳站的意向的多组SEM分析

Q1 Engineering

Transportation Engineering

Pub Date : 2025-12-01 DOI: 10.1016/j.treng.2025.100410

Simeon Stevenson Turay , Charles Anum Adams , Augustus Ababio-Donkor , R. Sivanandan , Karthik K. Srinivasan

In most Sub-Saharan African cities, promoting an integrated public transportation system often requires complementary feeder services. In Greater Freetown, Sierra Leone, proposals for the city’s first dedicated bus lane public transportation (DBLPT) system with high-quality buses are expected to transform existing service operations. A critical question is whether commuters will be willing to use paratransit services as a feeder to this new system. To explore this, the current study employs a multi-group structural equation modelling approach to investigate the factors influencing commuter intentions to adopt paratransit feeder services, thereby offering insights into service quality needs, potential behavioural shifts and system integration. The intention to use was tested for invariance across gender, age, and income groups. Data on the operations, service quality improvement, and commuters' intention to use the service were collected through a combination of onboard vehicle traffic and questionnaire surveys. Findings revealed that system accessibility and comfort positively influenced the intention to use paratransit feeder services. Gender and age differences were evident: males expressed stronger intentions to use an integrated feeder system, while females placed greater emphasis on comfort and convenience. Mid-aged adults were more sensitive to shorter commute distances, safety, intermodal connections, fare integration, and service accessibility. No significant differences were found across income groups for any of the measured attributes. Modal preference patterns indicated that minibuses were favoured by males and younger adults, whereas three-wheelers were preferred by females and mid-aged adults. These insights provide baseline evidence for planning and implementing integrated feeder services in developing cities.

在大多数撒哈拉以南非洲城市，促进综合公共交通系统往往需要补充支线服务。在塞拉利昂的大弗里敦（Greater Freetown），该市首个配备高质量公交车的专用公交车道公共交通（DBLPT）系统的提议有望改变现有的服务运营。一个关键的问题是，通勤者是否愿意使用辅助交通服务作为这个新系统的支线。为此，本研究采用多组结构方程建模方法，探讨影响通勤者采用支线服务意愿的因素，从而深入了解服务质量需求、潜在行为转变和系统整合。对使用意向进行了跨性别、年龄和收入群体的不变性测试。我们透过车载交通及问卷调查，收集有关营运、服务质素改善及乘客使用服务意愿的数据。研究结果显示，系统可达性和舒适度对辅助公交接驳服务的使用意愿有正向影响。性别和年龄差异很明显：男性更倾向于使用综合喂养系统，而女性更强调舒适和方便。中年人对较短的通勤距离、安全性、多式联运连接、票价整合和服务可及性更为敏感。在不同的收入群体中，没有发现任何测量属性的显著差异。男性和年轻人偏好小巴，而女性和中年人偏好三轮车。这些见解为发展中城市规划和实施综合支线服务提供了基础证据。

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引用次数: 0

A mathematical model for re-balancing bike-sharing system bikes using public transportation fleet 公共交通系统自行车再平衡的数学模型

Q1 Engineering

Transportation Engineering

Pub Date : 2025-11-17 DOI: 10.1016/j.treng.2025.100409

Summair Anis, Mohammad Ali Farrokhpour, Davide Giglio

The bike-sharing system has proved to be an efficient means of transportation for commuting short-distance trips within urban areas. It provides a cost-effective, flexible, and reliable solutions for commuters. However, managing these systems is complex due to the relocation strategies and operational costs associated with trucks usage which contribute to environmental issues and traffic congestion.

Thereby, this paper adopts a planning-oriented approach to conceptualize Ride-a-Bike system named as “RB” comprising of existing Public Transport (PT) buses with bike carriers. This system not only mitigate the issues of bike relocation, but also effective in managing passenger travel requests and optimizing operator’s additional revenues. The system is formulated as a Mixed-Integer Linear Programming (MILP) model to maximize bike relocation operations and operator’s additional revenue, through operation of RB system. Thereby, a trade-off between relocation operations and operator’s additional revenue is introduced through the provision of incentives to RB system passengers. The efficiency of the optimization model is evaluated using the PT network of Genova, Italy considering different operational scenarios involving bike demand, bike surplus, passenger demand, and dwell time thresholds. The results demonstrate that the proposed system efficiently performs bike relocation tasks while simultaneously optimize operator’s additional revenues, all while adhering to dwell time thresholds. The sensitivity analysis of operational parameters highlights the important statistics in terms of their impacts over the optimal objective values. Thus, it provides detailed insights for stakeholders to make informed decisions regarding adjustments to dwell time to better accommodate bike relocation demands.

自行车共享系统已被证明是城市地区短途通勤的有效交通工具。它为通勤者提供了经济、灵活、可靠的解决方案。然而，由于搬迁策略和与卡车使用相关的运营成本导致环境问题和交通拥堵，管理这些系统是复杂的。因此，本文采用以规划为导向的方法，将现有的公共交通（PT）公交车与自行车载体组成的骑行自行车系统概念化为“RB”。该系统不仅缓解了自行车搬迁问题，而且有效地管理了乘客的出行请求，优化了运营商的额外收入。该系统采用混合整数线性规划（MILP）模型，通过RB系统的运行，实现自行车搬迁作业和运营商额外收益的最大化。因此，通过向RB系统乘客提供激励措施，在搬迁作业和运营商的额外收入之间进行权衡。以意大利热那亚PT网络为例，考虑不同的运行场景，包括自行车需求、自行车剩余、乘客需求和停留时间阈值，对优化模型的效率进行了评估。结果表明，该系统有效地完成了自行车搬迁任务，同时优化了运营商的额外收入，同时遵守了停留时间阈值。操作参数的敏感性分析突出了它们对最优目标值的影响方面的重要统计。因此，它为利益相关者提供了详细的见解，以便在调整停放时间方面做出明智的决策，以更好地适应自行车搬迁需求。

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引用次数: 0

Developing strategies for improving travel time performance in multimodal public transport using ANP, PROMETHEE, network DEA, and optimization algorithms 利用ANP、PROMETHEE、网络DEA和优化算法，制定提高多式联运公共交通出行时间绩效的策略

Q1 Engineering

Transportation Engineering

Pub Date : 2025-11-13 DOI: 10.1016/j.treng.2025.100408

Rahul Tanwar , Sudesh Kumari

This study proposes an integrated framework combining Multi-Criteria Decision Making (MCDM), Data Envelopment Analysis (DEA), and optimization algorithms to improve travel time performance in multimodal public transport systems. This novel integrated framework represents the first comprehensive combination of MCDM, DEA, and optimization techniques for multimodal transport optimization. Applied to Bhopal, India's bus, BRT, and metro systems, the framework employs ANP, PROMETHEE, Network DEA, Super-Efficiency DEA, GA, and PSO techniques. ANP analysis identified in-vehicle travel time (0.35) and transfer time (0.28) as highest priority criteria. PROMETHEE ranking placed transfer synchronization (Φ=0.352) and dedicated bus lanes (Φ=0.283) as top improvement strategies. Network DEA revealed BRT system efficiency of 0.92, compared to metro (0.85) and conventional bus (0.78). Super-Efficiency DEA confirmed BRT superiority with score 1.25. Optimization algorithms achieved significant travel time reductions: GA (28.5 minutes, 19 % improvement, R²=0.87) and PSO (27.8 minutes, 21 % improvement, R²=0.91) compared to current performance (35.2 minutes). Results demonstrate the framework's effectiveness for evidence-based multimodal transport optimization and sustainable urban mobility planning.

本研究提出了一个结合多标准决策（MCDM）、数据包络分析（DEA）和优化算法的综合框架，以改善多式联运公共交通系统的出行时间性能。这个新颖的集成框架代表了多式联运优化中MCDM、DEA和优化技术的第一个综合组合。该框架应用于印度博帕尔的公交、快速公交和地铁系统，采用了ANP、PROMETHEE、Network DEA、Super-Efficiency DEA、GA和PSO技术。ANP分析发现，车内行驶时间（0.35）和换乘时间（0.28）是最优先的标准。PROMETHEE排名中，公交同步（Φ=0.352）和公交专用道（Φ=0.283）是最重要的改进策略。网络DEA显示，与地铁（0.85）和传统公交（0.78）相比，BRT系统效率为0.92。超效率DEA得分为1.25，证实了BRT的优越性。优化算法实现了显著的行程时间缩短：与当前性能（35.2分钟）相比，GA（28.5分钟，改进19%，R²=0.87）和PSO（27.8分钟，改进21%，R²=0.91）。结果表明，该框架在基于证据的多式联运优化和可持续城市交通规划方面具有有效性。

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引用次数: 0

Human-powered vehicles as a way to abate transport-related greenhouse gas emissions, Part 1: Assessing modal shift impact through comparative Life Cycle Assessment — An Italian case study 人力车辆作为一种减少交通相关温室气体排放的方法，第1部分：通过比较生命周期评估评估模式转变的影响-一个意大利案例研究

Q1 Engineering

Transportation Engineering

Pub Date : 2025-11-12 DOI: 10.1016/j.treng.2025.100401

Alessandro Di Gesù, Chiara Gastaldi, Cristiana Delprete

This study delves into the pressing issue of surging Greenhouse Gas (GHG) emissions within the European Union (EU) transport sector. With a particular focus on the significant environmental impact of road transportation, the paper advocates for a transition toward more sustainable alternatives. It specifically explores the potential of velomobiles, enclosed human-powered vehicles (HPVs), as a viable solution. A survey of more than 1200 individuals in Italy, with most respondents based in the Piedmont region, provides insights into commuting patterns across ten modes of transportation and attitudes toward the adoption of velomobiles. Survey results on the willingness to adopt velomobiles are used to project future mobility patterns within the population surveyed. Rather than merely reiterating the environmental benefits of cycling, the study offers an original contribution by integrating behavioural insights with environmental modelling to assess the realistic potential for a modal shift. Particular attention is given to identifying which transportation modes velomobiles are likely to replace, providing a nuanced understanding of their role in future sustainable mobility systems. The subsequent comparative Life Cycle Assessment (LCA) reveals GHG emission reductions with the most realistic scenarios indicating a 20% to 30% decrease in Well-To-Wheel emissions. Despite the conservative assumptions adopted, the study yields promising results. A final analysis, limited to velomobiles and cars, shows that expanding the system boundaries could lead to even greater savings, as the modal shift could extend the life of the car and help avoid the purchase of a second one in the long term. Velomobiles, with their potential to drive modal shifts, emerge as effective tools in reducing emissions. While recognizing regional variations, the study suggests encouraging outcomes for velomobile adoption in Italy and emphasizes the pivotal role of modal shifts in achieving sustainable transportation objectives.

本研究深入探讨了欧盟（EU）运输部门温室气体（GHG）排放激增的紧迫问题。本文特别关注道路运输对环境的重大影响，倡导向更可持续的替代方案过渡。它特别探讨了高速汽车的潜力，封闭式人力车辆（HPVs），作为一个可行的解决方案。一项针对意大利1200多人的调查提供了十种交通方式的通勤模式以及对采用高速汽车的态度的见解，其中大多数受访者来自皮埃蒙特地区。采用高速汽车意愿的调查结果被用来预测被调查人口未来的流动模式。该研究不仅重申了骑自行车对环境的好处，而且通过将行为见解与环境模型结合起来，评估了模式转变的现实潜力，从而做出了原创性贡献。特别注意的是确定哪些运输方式可能取代高速汽车，提供一个细致入微的理解，他们在未来的可持续移动系统的作用。随后的比较生命周期评估（LCA）显示，在最现实的情况下，从油井到轮毂的温室气体排放量减少了20%至30%。尽管采用了保守的假设，但这项研究得出了令人鼓舞的结果。最后一项仅限于机动车和轿车的分析表明，扩大系统边界可能会带来更大的节省，因为模式的转变可以延长汽车的使用寿命，并有助于避免长期购买第二辆汽车。高速汽车凭借其推动模式转变的潜力，成为减少排放的有效工具。在认识到地区差异的同时，该研究建议在意大利鼓励采用高速汽车，并强调模式转变在实现可持续交通目标方面的关键作用。

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引用次数: 0

An integrated intelligent speed adaptation system for enhanced driver assistance, driving performance and safety 集成智能速度适应系统，增强驾驶员辅助，驾驶性能和安全性

Q1 Engineering

Transportation Engineering

Pub Date : 2025-11-11 DOI: 10.1016/j.treng.2025.100407

Abrar Hazoor , Alessandra Lioi , Giuseppe Marinelli , Marco Bassani

Advanced Driver Assistance Systems (ADAS) have become an integral part of modern vehicles, significantly changing the driving experience. Adaptive Cruise Control (ACC) assists drivers in maintaining a constant speed and a safe following distance; however, it does not moderate the speed along curves when sight limitations occur, thus compromising safety. To address these challenges, this study integrates the Intelligent Speed Adaptation for Visibility (V-ISA) system with ACC. The V-ISA system dynamically adjusts the vehicle speed based on real-time visibility conditions, thereby enhancing safety on road curves where sight distance is restricted. Additionally, this study evaluates the impact of the ACC + V-ISA system on driver performance, specifically focusing on speed management, lateral vehicle control, and driver experience with assistance systems. The study was conducted in a simulated environment with forty-five participants. The results revealed that the ACC + V-ISA system effectively reduced vehicle speed on curves with limited visibility. The ability of the system to regulate speed according to prevailing road conditions highlights its potential to improve road safety. Moreover, the findings suggest that using the V-ISA system integrated with ACC maintains user acceptance and satisfaction while imposing no additional mental workload compared to using ACC alone. These insights are crucial for the future design of ADAS and autonomous vehicles and emphasize the importance of introducing this system into vehicles.

高级驾驶辅助系统（ADAS）已经成为现代车辆不可或缺的一部分，极大地改变了驾驶体验。自适应巡航控制系统（ACC）帮助驾驶员保持恒定的速度和安全的跟随距离；然而，当视线受限时，它不能调节沿着弯道的速度，从而危及安全。为了解决这些挑战，本研究将智能速度适应能见度（V-ISA）系统与ACC集成在一起。V-ISA系统根据实时能见度情况动态调整车速，从而提高在视线距离受限的弯道上行驶的安全性。此外，本研究还评估了ACC + V-ISA系统对驾驶员表现的影响，特别关注速度管理、横向车辆控制和辅助系统的驾驶员体验。这项研究是在一个模拟环境中进行的，有45名参与者。结果表明，ACC + V-ISA系统可以有效降低车辆在能见度有限的弯道上的车速。该系统根据当时的道路状况调节速度的能力突出了其改善道路安全的潜力。此外，研究结果表明，与单独使用ACC相比，使用集成了ACC的V-ISA系统可以保持用户的接受度和满意度，同时不会增加额外的心理工作量。这些见解对于未来ADAS和自动驾驶汽车的设计至关重要，并强调了将该系统引入汽车的重要性。

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引用次数: 0

Multi-parameter geotechnical mapping of lateritic soils in the urban perimeter of Ngaoundal (Cameroon) for pavement and foundation design 喀麦隆Ngaoundal城市周边红土的多参数岩土测绘，用于路面和基础设计

Q1 Engineering

Transportation Engineering

Pub Date : 2025-11-06 DOI: 10.1016/j.treng.2025.100406

Abdoul Aboubakar , Blondel Thiery Talla Suffeu , Donald Eric Teikeu Ngueveu , Stephane Tagne Tchomtchoua , Rodrigue Toteu Talla , Bertol Ngouateu Nouwa , Yannick Langollo Tchedele , Quentin Marc Anaba Fotze , Ilalie Bertille Kentsa Manefouet , Thomas Tatietse Tamo

Lateritic soils are widely used in tropical regions for road construction and urban infrastructure, yet their geotechnical variability poses challenges for stability and durability. This study presents a multi-parameter geotechnical mapping of soils from the urban perimeter of Ngaoundal, Adamawa, Cameroon, aiming to evaluate their suitability for supporting pavements and shallow foundations. Laboratory tests were conducted on water content, particle size distribution, plasticity index (PI), swelling potential, specific gravity, maximum dry density, California Bearing Ratio (CBR), and allowable stresses. Results indicate that water content ranges from 10.0 to 15.0 %, with fines fractions (silt and clay) between 14.6 and 24.7 %. Plasticity indices vary from 23.6 to 26.3 %, while swelling values range from 0.05 to 0.41, reflecting low moisture sensitivity. Specific gravity and maximum dry density values range from 2.580–2.648 g/cm³ and 2.040–2.188 g/cm³, respectively. High CBR values (78–95.1 %) and allowable stresses (0.237–3.671 MPa) demonstrate good load-bearing capacity. Based on a multi-parameter analysis, soils were classified into three categories: good, medium, and poor. Dense, low-plasticity soils are suitable for pavement layers and foundations, whereas high-plasticity, water-rich soils require stabilization measures such as compaction enhancement or chemical treatment. The generated geotechnical maps provide a spatial visualization of soil variability, offering practical guidance for engineers and urban planners to optimize design and construction in heterogeneous tropical soils. The study also establishes reference data for future infrastructure projects in Ngaoundal and similar tropical urban environments.

红土在热带地区广泛用于道路建设和城市基础设施建设，但其岩土力学变异性对其稳定性和耐久性提出了挑战。本研究展示了喀麦隆阿达马瓦恩翁达尔城市周边土壤的多参数岩土测绘，旨在评估其用于支撑路面和浅基础的适用性。进行了含水量、粒径分布、塑性指数（PI）、膨胀势、比重、最大干密度、加州承载比（CBR）、许用应力等室内试验。结果表明：水含量在10.0% ~ 15.0%之间，细粒组分（粉砂和粘土）在14.6% ~ 24.7%之间。塑性指数在23.6% ~ 26.3%之间，膨胀值在0.05 ~ 0.41之间，水分敏感性较低。比重和最大干密度分别为2.580 ~ 2.648 g/cm³和2.040 ~ 2.188 g/cm³。高CBR值（78 ~ 95.1%）和许用应力（0.237 ~ 3.671 MPa）表现出良好的承载能力。基于多参数分析，将土壤分为好、中、差三类。致密、低塑性的土壤适合铺装层和基础，而高塑性、富水的土壤则需要采取夯实或化学处理等稳定措施。生成的岩土工程图提供了土壤变异性的空间可视化，为工程师和城市规划者在异质热带土壤中优化设计和施工提供了实用指导。该研究还为恩翁达尔和类似热带城市环境的未来基础设施项目提供了参考数据。

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引用次数: 0

Classification of road transport earth retaining structures based on improved ConvNeXt V2 基于改进型ConvNeXt V2的公路运输挡土结构分类

Q1 Engineering

Transportation Engineering

Pub Date : 2025-10-31 DOI: 10.1016/j.treng.2025.100405

Md Zahidul Islam , Chin Jian Leo , Ju Jia Zou , Eileen An , Samanthika Liyanapathirana , Pan Hu , Bo Xiao , Stanley Yuen

An earth-retaining structure (ERS) is a type of wall widely used to support and protect soil, rock, or other earth materials in many parts of transport infrastructure. ERSs are constructed to create grade separation, particularly at inclined locations or where earth cuttings are required. Over 42 types of ERSs exist in the areas under the jurisdiction of Transport for New South Wales (TfNSW). For effective structural health monitoring, it is crucial to classify an ERS according to its type and establish its GPS coordinates and longitudinal length. The classification is necessary because the defects that occur in the ERS depend on its type. This study proposes a deep learning-based framework that leverages ConvNeXt V2 to classify ERS types and capture the relevant data from vehicle-mounted video capturing systems. The framework integrates spatial–temporal image sequences with GPS coordinates and longitudinal length to enhance context-aware recognition. An improved ConvNeXt V2 model is fine-tuned to learn rich visual features of ERS embedded with GPS metadata. The model is trained and evaluated on a dataset comprising diverse ERS classes captured across TfNSW road transport areas. The experimental results demonstrate significant improvements in classification accuracy and robustness. This emphasizes the potential of the proposed system for scalable, automated ERS inventory and condition assessment.

挡土结构（ERS）是一种广泛用于支持和保护土壤、岩石或其他土质材料在交通基础设施的许多部分的墙。建造rs是为了产生等级分离，特别是在倾斜的位置或需要土岩屑的地方。在新南威尔士州交通局（TfNSW）管辖的地区，有超过42种类型的自动驾驶系统。为了有效地进行结构健康监测，对ERS进行分类，建立其GPS坐标和纵向长度是至关重要的。分类是必要的，因为在ERS中发生的缺陷取决于其类型。本研究提出了一个基于深度学习的框架，该框架利用ConvNeXt V2对ERS类型进行分类，并从车载视频捕获系统中捕获相关数据。该框架将时空图像序列与GPS坐标和纵向长度相结合，以增强上下文感知识别。对改进的ConvNeXt V2模型进行了微调，以学习嵌入GPS元数据的ERS丰富的视觉特征。该模型是在一个数据集上进行训练和评估的，该数据集包括在TfNSW道路运输区域捕获的各种ERS类。实验结果表明，该方法在分类精度和鲁棒性方面有显著提高。这强调了拟议系统在可扩展、自动化ERS库存和状态评估方面的潜力。

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引用次数: 0

Longitudinal and lateral performances of electrically assisted personal mobility vehicles: A comparative field test analysis of e-scooter, e-bicycle, and e-monowheel 电动辅助个人移动车辆的纵向和横向性能：电动踏板车、电动自行车和电动单轮车的比较现场试验分析

Q1 Engineering

Transportation Engineering

Pub Date : 2025-10-27 DOI: 10.1016/j.treng.2025.100404

Claire Naude, Ebrahim Riahi, Bastien Canu, Thierry Serre

The increasing popularity of Electrically Assisted Personal Mobility Vehicles (e-PMVs) represents a significant shift in urban transportation, offering flexibility and environmental benefits, yet raising safety concerns, particularly regarding accidents involving vulnerable road users. Research on the dynamic performance of these vehicles is essential to address such concerns and ensure safer interaction with other vehicles and ease their integration into urban traffic. This study explores the longitudinal (braking and acceleration) and lateral (avoidance and slalom) performances of e-PMVs through 127 controlled track tests conducted by three e-scooter riders, two e-bicycle riders, and one e-monowheel rider using one of the most common models of these vehicles. Specific performance indicators were defined for each maneuver to evaluate and compare dynamic capabilities. Results show that e-bicycles exhibits the most effective braking performance, achieving decelerations close to 6 m/s², while e-scooters and e-monowheels demonstrate lower deceleration rates around 3.7 m/s² and 2.8 m/s², respectively. Acceleration is quite similar across vehicles, ranging from 0.7 to 0.9 m/s² in sport/turbo mode. Performance differences during evasive maneuvers are minimal, with maximum roll rate ranging between 70 and 110°/s and maximum roll angle between 15° and 22° In slalom, the e-monowheel shows the highest roll rate at 102°/s, followed by the e-bicycle at 87°/s and the e-scooter at 69°/s. The study highlights that e-PMVs, particularly e-scooters and e-monowheels, have substantially lower braking and acceleration capabilities than conventional motor vehicles, which likely increases the risk of traffic conflicts escalating into accidents. By filling a gap in the experimental knowledge base, especially concerning monowheels, these findings underscore the need for further research aimed at improving the design and safety features of e-PMVs, prioritizing improvements in braking efficiency and maneuverability to mitigate potential risks and offer users a safer mode of transportation.

电动辅助个人移动车辆（e- pmv）的日益普及代表了城市交通的重大转变，提供了灵活性和环境效益，但也引起了安全问题，特别是涉及弱势道路使用者的事故。研究这些车辆的动态性能对于解决这些问题，确保与其他车辆更安全的互动，并使其更容易融入城市交通至关重要。本研究通过127个受控轨道试验，探讨了e- pmv的纵向（制动和加速）和横向（避让和障碍）性能。试验由三名电动滑板车车手、两名电动自行车车手和一名电动单轮车手使用这些车辆中最常见的一种车型进行。为每个机动定义了具体的性能指标，以评估和比较动态能力。结果表明，电动自行车的制动效果最好，减速度接近6 m/s²，而电动滑板车和电动单轮车的减速度较低，分别在3.7 m/s²和2.8 m/s²左右。不同车型的加速度非常相似，在运动/涡轮增压模式下的加速度范围为0.7至0.9 m/s²。规避机动时的性能差异很小，最大滚转速率在70°到110°/s之间，最大滚转角在15°到22°之间。在障碍赛中，电子单轮的滚转速率最高，为102°/s，其次是电动自行车的87°/s和电动滑板车的69°/s。该研究强调，电动pmv，特别是电动滑板车和电动单轮车，与传统机动车辆相比，制动和加速能力要低得多，这可能会增加交通冲突升级为事故的风险。通过填补实验知识库的空白，特别是关于单轮车的空白，这些发现强调了进一步研究的必要性，旨在改进e- pmv的设计和安全特性，优先改进制动效率和机动性，以减轻潜在风险，为用户提供更安全的交通方式。

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引用次数: 0

A novel approach to combating air pollution from associated gas flares by innovative hot air balloon technology 通过创新的热气球技术对抗伴生气体燃烧造成的空气污染的新方法

Q1 Engineering

Transportation Engineering

Pub Date : 2025-10-26 DOI: 10.1016/j.treng.2025.100403

Tahseen Hameed khalif , Mudhar A. Al-Obaidi , Farhan Lafta Rashid , Issa Omle

Large quantities of associated natural gas have been burned in oil fields since the discovery of oil, until its flares were called the eternal fire. The combustion products cause significant air pollution in work environments and surrounding communities, where a huge waste could be invested in the economic development of oil-producing countries. This research presents a novel hot air balloon technology integrated with hot gases from associated gas flares to disperse pollutants (CH₄, CO₂, SO₂, CO, nitrogen oxides (NOx) and volatile organic compounds) at proper heights, thus refining air quality near ground level. Specifically, this system utilises wasted energy from burning associated gas to generate electrical energy to address the economic loss connected to gas flaring. Theoretical design and a theoretical model derived from the literature are used to measure pollutant concentrations at different balloon altitudes while considering the impact of pollutant discharge point on air quality near the ground surface. The results indicate that the pollutant concentration of 114.16 μg/m³ at 100 m of balloon altitude. Afterwards, a balloon of 3.5 m diameter is constructed and successfully integrated to an electricity generation system. In turn, the results reveal the generation of 225.2 W of power and 1 A of current within an ascent time of just 8.2 s, accomplished with a temperature difference of 85 °C between the interior and exterior of the balloon. Accordingly, this advanced technology not only disperses hazardous gaseous combustion products away from human populations but also exploits lost thermal energy, aiding to sustainable energy solutions and elucidating high operational efficacy. In other words, the potential of this technology is assured as an efficient technique to mitigate air pollution from associated gas flares while generating valued electrical energy.

自从发现石油以来，大量伴生天然气在油田中燃烧，直到其火焰被称为“永恒之火”。燃烧产物对工作环境和周围社区造成了严重的空气污染，这一巨大的浪费可以投资于石油生产国的经济发展。本研究提出了一种新型的热气球技术，该技术结合伴生气体燃烧产生的热气，将污染物（CH₄、CO₂、SO₂、CO、氮氧化物（NOx）和挥发性有机化合物）分散到适当的高度，从而改善近地面的空气质量。具体来说，该系统利用燃烧伴生气产生的浪费能量来产生电能，以解决与天然气燃除相关的经济损失。在考虑污染物排放点对近地表空气质量影响的情况下，采用理论设计和从文献中导出的理论模型测量不同气球高度的污染物浓度。结果表明：在100 m气球高度，污染物浓度为114.16 μg/m3；随后，建造了一个直径3.5米的气球，并成功地集成到发电系统中。结果显示，在仅8.2秒的上升时间内，气球内部和外部的温差为85°C，产生了225.2 W的功率和1 A的电流。因此，这项先进的技术不仅可以将有害的气体燃烧产物分散到远离人类的地方，还可以利用损失的热能，帮助实现可持续能源解决方案，并阐明高操作效率。换句话说，这项技术的潜力是一种有效的技术，可以减轻伴生气体燃烧造成的空气污染，同时产生有价值的电能。

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引用次数: 0

Environmental footprint of diesel engine corrosion under biodiesel-dimethyl carbonate-diesel samples by the engine oil monitoring procedure 生物柴油-碳酸二甲酯-柴油样品腐蚀的环境足迹

Q1 Engineering

Transportation Engineering

Pub Date : 2025-10-26 DOI: 10.1016/j.treng.2025.100402

Sina Ardabili , Aziz Babapoor , Ramin Meshkabadi

This research is the linking of engine corrosion - monitored through oil analysis - to environmental impacts using the LCA technique, which provides new insights into the indirect consequences of biodiesel fuels and oxygenate additives. Biodiesel was produced through the transesterification process of waste cooking oil. Four levels of DMC (0, 2, 4, and 6 %) were mixed with biodiesel fuel, and after mixing with biodiesel, fuels containing B2 (2 % biodiesel and 98 % diesel) were prepared in different treatments. The engine was a single-cylinder, naturally aspirated, direct injection diesel engine with a constant speed (1500 rpm). LCA was conducted through ISO 14,040–14,041 standards using the IMPACT2002+ method for life cycle inventory analysis. The results of oil analysis showed that the addition of biodiesel and DMC had a significant effect on the content of abrasive metals in engine oil. The addition of 2 % DMC in biodiesel reduced aluminum and iron compared to the control fuel sample. On the other hand, higher percentages of DMC and biodiesel increased the content of copper and chromium, resulting in increased corrosion. According to the environmental assessment results, adding biodiesel (2 %) and DMC (2–4 %) reduced the average environmental endpoint impact of engine corrosion by about 10–13 %. However, adding about 6 % DMC increased the environmental impact by about 16 %. This trend indicates the need to monitor and optimize biodiesel fuel additives. The impact on resource quality has the largest share. This is while the least impact is related to climate change. Future studies could focus on advanced and intelligent monitoring of corrosion byproducts and adapting engine design to achieve mechanical durability and environmental sustainability.

这项研究是利用LCA技术将发动机腐蚀（通过油品分析监测）与环境影响联系起来，为生物柴油燃料和含氧添加剂的间接后果提供了新的见解。以废食用油为原料，通过酯交换反应制备生物柴油。将4种浓度的DMC（0、2、4、6%）与生物柴油混合，与生物柴油混合后，以不同的处理方式制备含B2（2%生物柴油和98%柴油）的燃料。发动机是一台单缸，自然吸气，直喷柴油发动机，恒速（1500转/分）。LCA通过ISO 14040 - 14041标准进行，使用IMPACT2002+方法进行生命周期清单分析。油品分析结果表明，生物柴油和DMC的加入对发动机油中磨料金属的含量有显著影响。与对照燃料样品相比，在生物柴油中添加2%的DMC降低了铝和铁。另一方面，较高的DMC和生物柴油百分比增加了铜和铬的含量，导致腐蚀加剧。根据环境评价结果，添加生物柴油（2%）和DMC（2 - 4%）可使发动机腐蚀的平均环境端点影响降低约10 - 13%。然而，添加约6%的DMC会使环境影响增加约16%。这一趋势表明需要监测和优化生物柴油燃料添加剂。对资源质量的影响最大。而与气候变化相关的影响最小。未来的研究可以集中在腐蚀副产物的先进和智能监测以及适应发动机设计，以实现机械耐久性和环境可持续性。

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引用次数: 0