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Shared autonomous vehicle operational decisions with vehicle movement and user travel behaviour 根据车辆行驶和用户出行行为共享自动驾驶车辆的运行决策
IF 5.1 2区 工程技术 Q1 TRANSPORTATION Pub Date : 2024-06-26 DOI: 10.1016/j.tbs.2024.100848
Kai Huang , Chengqi Liu , Chenyang Zhang , Zhiyuan Liu , Hanfei Hu

Shared Autonomous Vehicle (SAV) has many impacts on the transport development, such as saving parking space. However, SAV meets a huge challenge in terms of vehicle supply and user demand imbalance. The traditional mathematical optimization method cannot be well used due to the computational burden. Hence, this paper proposes a Reinforcement Learning (RL) based SAV relocation approach. First, two types of RL agents, car-based and zone-based agents, are developed as agents for vehicles and stations, respectively. Then, the RL scheme is trained by using historical demand data to facilitate real-time carsharing relocation. Finally, to compare the proposed two types of RL methods, three scenarios are used: small-scale, middle-scale, and large-scale networks. Solutions indicate that the enhanced zone-based method achieves an additional 146% profit compared to traditional threshold-based relocation strategies. The user travel behaviour impacts are provided by analyzing parking demand and travel movements among residential, industrial and commercial zones.

共享自动驾驶汽车(SAV)对交通发展有很多影响,比如节省停车空间。然而,SAV 在车辆供应和用户需求不平衡方面面临巨大挑战。由于计算负担,传统的数学优化方法无法得到很好的应用。因此,本文提出了一种基于强化学习(RL)的 SAV 迁移方法。首先,开发了两种 RL 代理,即基于车的代理和基于区域的代理,分别作为车辆和站点的代理。然后,利用历史需求数据对 RL 方案进行训练,以促进汽车共享的实时迁移。最后,为了比较所提出的两种 RL 方法,使用了三种场景:小规模、中等规模和大规模网络。解决方案表明,与传统的基于阈值的搬迁策略相比,基于区域的增强型方法实现了 146% 的额外利润。通过分析住宅区、工业区和商业区之间的停车需求和出行动向,提供了用户出行行为的影响。
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引用次数: 0
Determinants of the travel satisfaction of e-scooter users 电动摩托车用户出行满意度的决定因素
IF 5.1 2区 工程技术 Q1 Social Sciences Pub Date : 2024-06-22 DOI: 10.1016/j.tbs.2024.100853
Andreas Nikiforiadis , Christina Lioupi , Grigorios Fountas , Nikiforos Stamatiadis , Socrates Basbas

This paper seeks to fill in the current evidence gap on the relationship between travel satisfaction and e-scooter use. To do so, online survey data from e-scooter users of a University community in the city of Thessaloniki, Greece were collected and statistically analyzed. In line with previous research on travel satisfaction, the results of a series of exploratory and confirmatory factor analyses unveiled the potential of factors surrounding positive activation, positive deactivation, and cognitive evaluation to serve as key determinants of satisfaction of e-scooter riders. Furthermore, a structural equation model (SEM) was estimated to identify the impact of user- and trip-related characteristics on travel satisfaction. The results of the SEM showed that older and high-income riders, those with good self-reported physical condition, riders of private e-scooters and leisure travelers are more likely to perceive greater satisfaction by the use of their e-scooters. The findings of this study overall contribute to the current state-of-knowledge relating to travel satisfaction and pave the way for potential policy actions that could improve users’ experience with e-scooters and enhance the overall attractiveness of micromobility in the pathway towards sustainable and inclusive mobility.

本文旨在填补目前关于出行满意度与电动摩托车使用之间关系的证据空白。为此,本文收集并统计分析了希腊塞萨洛尼基市一所大学社区电动摩托车用户的在线调查数据。与以往关于出行满意度的研究一样,一系列探索性和确认性因素分析的结果揭示了围绕积极激活、积极失活和认知评价的因素可能成为电动摩托车骑行者满意度的关键决定因素。此外,还估算了一个结构方程模型(SEM),以确定用户和旅行相关特征对旅行满意度的影响。结构方程模型的结果表明,年龄较大和高收入的骑行者、自我报告身体状况良好者、私人电动滑板车骑行者和休闲旅行者更有可能通过使用电动滑板车获得更大的满意度。这项研究的结果总体上有助于了解目前与出行满意度相关的知识,并为潜在的政策行动铺平了道路,这些行动可以改善用户使用电动滑板车的体验,并在实现可持续和包容性交通的道路上提高微型交通的整体吸引力。
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引用次数: 0
Can self-reliant societies be potential adopters of electric bicycles? Examining the role of sociopsychological influences among the university employees in India 自力更生的社会能否成为电动自行车的潜在采用者?研究印度大学员工中社会心理影响因素的作用
IF 5.2 2区 工程技术 Q1 Social Sciences Pub Date : 2024-06-18 DOI: 10.1016/j.tbs.2024.100849
Mohammad Zabiulla , Prasanta K. Sahu , Bandhan Bandhu Majumdar , Rodrigo Rico Bini

Electric bicycles (e-bikes) are gaining popularity globally as green and active modes of transport. Research on e-bike adoption to date has predominantly investigated various extrinsic motivations to use an e-bike, and little is known about the psychological influences. Examining the influence of psychological determinants is crucial to comprehend the unobserved individual and social factors affecting e-bike adoption. This study aims to determine the sociopsychological influences associated with e-bike use among the daily commuters (employees) of two university campuses in India which represent self-reliant societies. The study extends the classic Theory of Planned Behaviour (TPB) framework to account for influences like personal norms, knowledge of e-bikes, and parking anxiety, in addition to fundamental TPB constructs (attitudes, subjective norms, and perceived behavioural control). Results are constructed by a structural equation model (SEM) for a sample of 347 non-users of e-bikes. SEM model indicates that among all TPB constructs, subjective norms are the strongest predictors of intentions to use e-bikes. Both subjective norms and attitudes have a significant positive effect on adoption intentions, whereas perceived behavioural control has a significant negative effect. Personal norms had significant indirect positive effects on e-bike use intentions with fundamental TPB constructs as mediators. Interestingly, parking anxiety (anxiety from missing the car parking spaces) positively, and knowledge of e-bikes negatively influence the e-bike adoption intentions. Further, comparison by psychological influences reveals that a significant difference exists between the perceptions of the two university commuters towards e-bike use, possibly due to the distinct terrain and climate characteristics of the universities. The study findings have implications for designing effective e-bike interventions and awareness programs seeking to promote e-bike adoption, particularly in self-reliant communities.

电动自行车(e-bike)作为一种绿色、积极的交通工具,在全球范围内越来越受欢迎。迄今为止,有关电动自行车应用的研究主要调查了使用电动自行车的各种外在动机,而对心理影响因素知之甚少。研究心理决定因素的影响对于理解影响电动自行车采用的未观察到的个人和社会因素至关重要。本研究旨在确定与印度两所大学校园日常通勤者(员工)使用电动自行车相关的社会心理影响因素。该研究扩展了经典的计划行为理论(TPB)框架,除了基本的 TPB 构建(态度、主观规范和感知行为控制)外,还考虑了个人规范、电动自行车知识和停车焦虑等影响因素。研究结果通过结构方程模型(SEM)得出,样本为 347 名非电动自行车用户。SEM 模型表明,在所有 TPB 构建中,主观规范对电动自行车使用意向的预测作用最强。主观规范和态度对采用意向都有显著的积极影响,而感知行为控制则有显著的消极影响。个人规范对电动自行车使用意向有明显的间接积极影响,而基本的 TPB 构建则是中介。有趣的是,停车焦虑(因错过停车位而产生的焦虑)对电动自行车使用意向有积极影响,而电动自行车知识对其有消极影响。此外,通过心理影响因素的比较发现,两所大学的通勤者对电动自行车使用的看法存在显著差异,这可能是由于两所大学不同的地形和气候特征造成的。研究结果对设计有效的电动自行车干预措施和宣传计划以促进电动自行车的采用具有启示意义,尤其是在自力更生的社区。
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引用次数: 0
Risk prediction model for distracted driving: Characterizing interactions of eye glances and manual sequences 分心驾驶风险预测模型:瞥一眼和手动操作序列的相互作用特征
IF 5.2 2区 工程技术 Q1 Social Sciences Pub Date : 2024-06-17 DOI: 10.1016/j.tbs.2024.100851
Sixian Li, Dalin Qian, Pengcheng Li, Xinwu Yuan, Qiong Fang

Distracted driving substantially undermines road safety, and the frequent, low-accuracy distracted driving risk prediction alarms may detrimentally affect drivers’ judgments. The study aims to improve risk prediction accuracy by mapping the distinctive interactions of eye glances and manual sequences in distracted driving into a graph structure of nodes and edges. Distraction patterns are categorized as visual distractions (VD), manual distractions (MD), and visual-manual distractions (VMD) based on daily driving behaviours, such as eating, drinking, reaching for something, and using mobile phones. 1,806 distraction alarm records came from an active safety platform (ASP) in Beijing, covering 69 drivers from 23 hazardous materials road transport companies. The study extracts characteristics to assess distracted driving risks, including visual, manual, and driving performance features. Subsequently, unsupervised learning is used to cluster risk features into three categories (low, medium, and high), which serve as labels for the risk prediction model. In addition, each distraction alarm sequence is divided into nodes and edges of a graph. More specifically, five visual areas, forward (F), object of distraction (Dis), left window (LW), rear-view mirror (RM), center dashboard (C), as well as manual sequences, single hand (H), double hands (2H) are represented as nodes. The edges are connected in parallel (occurring simultaneously) or in series (occurring sequentially), with arrows pointing from the earlier node to the later one. Furthermore, coupled with time, global, and environmental features, a temporal graph attention network (TGAT) with integrated time functions and multi-head attention mechanisms is developed to predict distracted driving risks. The results indicated that VMD demanded more visual and manual resources and led to more high-risk alarms than VD and MD. Besides, TGAT reached a promising result, outperforming other time series methods. This study is valuable for driver distraction monitoring and driving risk assessment, significantly contributing to the enhancement of road safety.

分心驾驶严重破坏了道路安全,而频繁、低准确度的分心驾驶风险预测警报可能会对驾驶员的判断产生不利影响。本研究旨在通过将分心驾驶中眼睛瞥视和手动操作序列的独特互动映射到由节点和边组成的图结构中,从而提高风险预测的准确性。根据日常驾驶行为,如吃喝、伸手拿东西和使用手机等,分心模式被分为视觉分心(VD)、手动分心(MD)和视觉-手动分心(VMD)。1,806条分心报警记录来自北京的主动安全平台(ASP),涵盖23家危险品道路运输公司的69名驾驶员。研究提取了评估分心驾驶风险的特征,包括视觉特征、手动特征和驾驶表现特征。然后,利用无监督学习将风险特征聚类为三个类别(低、中、高),作为风险预测模型的标签。此外,每个分心警报序列都被划分为图的节点和边。更具体地说,前方(F)、分心对象(Dis)、左侧车窗(LW)、后视镜(RM)、中央仪表板(C)这五个视觉区域以及单手(H)、双手(2H)这两个手动序列被表示为节点。边缘以并联(同时发生)或串联(依次发生)的方式连接,箭头从较早的节点指向较晚的节点。此外,结合时间、全局和环境特征,开发了一个具有综合时间函数和多头注意力机制的时间图注意力网络(TGAT),用于预测分心驾驶风险。结果表明,与 VD 和 MD 相比,VMD 需要更多的视觉和手动资源,并导致更多的高风险警报。此外,TGAT 取得了良好的结果,优于其他时间序列方法。这项研究对驾驶员分心监控和驾驶风险评估很有价值,将极大地促进道路安全的提高。
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引用次数: 0
Subsidizing residents or companies? An equilibrium-based analysis of subsidy strategies for EV charging facilities 补贴居民还是公司?基于均衡的电动汽车充电设施补贴策略分析
IF 5.2 2区 工程技术 Q1 Social Sciences Pub Date : 2024-06-15 DOI: 10.1016/j.tbs.2024.100844
Fu-Lin Wang, Hai-Jun Huang

This study examines the charging location choice behavior of residents in relation to employer-provided charging facilities and investigates the impact of different government subsidy strategies for charging facility construction on urban spatial structure and traffic-related air pollution. Using a monocentric two-zone city model, we analyze the residential distribution and travel mode choice of urban residents under various subsidy strategies from the perspective of social planners. The government can optimize urban resource allocation through transport infrastructure investments and implementation of emission taxes to maximize the so-called residents’ utility. We observe that despite the distorting effect of employer-provided charging facilities on travel mode choice, residents still experience an enhanced utility due to the positive environmental impact resulting from reduced pollution levels associated with electric vehicles (EVs) compared to gasoline vehicles (GVs). We provide numerical evidence to show that government subsidies, whether directed towards companies or residents, can effectively enhance the adoption of EVs and improve utility. In low-density cities, it is advisable for the government to encourage and subsidize residents in building charging facilities. Conversely, in high-density cities, prioritizing subsidies for companies would be more beneficial in improving utility and expanding the coverage of charging facilities. Furthermore, in cities where resident environmental awareness is relatively low, it is recommended that the government increase subsidies to promote EV adoption.

本研究探讨了居民对雇主提供的充电设施的充电地点选择行为,并研究了政府对充电设施建设的不同补贴策略对城市空间结构和交通相关空气污染的影响。我们利用单中心双区城市模型,从社会规划者的角度分析了不同补贴策略下城市居民的居住分布和出行方式选择。政府可以通过交通基础设施投资和实施排放税来优化城市资源配置,从而实现所谓的居民效用最大化。我们发现,尽管雇主提供的充电设施对居民的出行方式选择有扭曲作用,但由于电动汽车(EV)与汽油汽车(GV)相比降低了污染水平,对环境产生了积极影响,居民的效用仍然得到了提高。我们提供的数字证据表明,无论是针对企业还是居民的政府补贴,都能有效促进电动汽车的采用并提高效用。在低密度城市,政府宜鼓励和补贴居民建设充电设施。相反,在高密度城市,优先补贴企业将更有利于提高电动汽车的使用率和扩大充电设施的覆盖面。此外,在居民环保意识相对较低的城市,建议政府加大补贴力度,促进电动汽车的应用。
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引用次数: 0
Exploring pedestrian thermal risk exposure and its determinants among various types of walking trips: A gendered examination from a GPS-based study in Nanjing 探索行人热风险暴露及其在各类步行出行中的决定因素:南京基于 GPS 的性别研究
IF 5.2 2区 工程技术 Q1 Social Sciences Pub Date : 2024-06-14 DOI: 10.1016/j.tbs.2024.100841
Yifu Ge, Yang Hu, Zhongyu He, Wenhao Hu, Yuwen Lu, Guofang Zhai

Previous research has found that components of the natural and built environment play an important role in regulating ambient temperature. However, existing research regarding the association between these environmental characteristics and thermal exposure has focused mainly at the macro level, leaving this relationship at the individual level underexplored. It remains unknown how the environment functions differently in determining thermal exposure among various types of trips and how this mechanism differs by gender. Using GPS walking trajectory data collected in Nanjing, China, this study examines the extent to which male and female pedestrians experience different levels of thermal exposure, and how the thermal exposure determinants work differently between utilitarian and recreational trips. Descriptive analysis shows that men experience higher per-minute thermal exposure than women, and both male and female pedestrians face higher thermal exposure per minute during utilitarian walks compared to recreational walks. Generalized linear mixed model results indicate that green spaces significantly reduce thermal exposure for both male and female pedestrians during utilitarian walking trips, but this effect only works among women regarding recreational walking. We also identified a negative relationship between water bodies and thermal exposure during recreational walks, but this correlation only occurs among women. Our study suggests that the natural environment’s mitigating effect on thermal exposure differs by gender among different types of walking trips. Policymakers should consider these disparities to avoid exacerbating gender inequality in the arena of thermal exposure and health.

以往的研究发现,自然环境和建筑环境的组成部分在调节环境温度方面发挥着重要作用。然而,有关这些环境特征与热暴露之间关系的现有研究主要集中在宏观层面,而对个体层面的这种关系则缺乏探索。人们仍然不知道环境在决定各种类型旅行的热暴露方面有何不同,也不知道这种机制在性别上有何差异。本研究利用在中国南京收集到的 GPS 步行轨迹数据,研究了男性和女性行人在多大程度上经历了不同程度的热暴露,以及热暴露决定因素在功利性出行和娱乐性出行中的不同作用。描述性分析表明,与女性相比,男性每分钟的热暴露量更高,与休闲步行相比,男性和女性行人在功用性步行时每分钟的热暴露量都更高。广义线性混合模型的结果表明,绿地能显著减少男女行人在功用性步行中的热暴露,但这种效应只在女性休闲步行中有效。我们还发现水体与休闲步行时的热暴露之间存在负相关关系,但这种相关性只发生在女性身上。我们的研究表明,在不同类型的徒步旅行中,自然环境对热暴露的缓解作用因性别而异。政策制定者应考虑这些差异,以避免在热暴露和健康领域加剧性别不平等。
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引用次数: 0
Analysis of user behavior in urban parking under different level of information scenarios provided by smart devices or connected cars 智能设备或联网汽车提供的不同级别信息场景下的城市停车用户行为分析
IF 5.2 2区 工程技术 Q1 Social Sciences Pub Date : 2024-06-12 DOI: 10.1016/j.tbs.2024.100847
Andrés Rodríguez, Borja Alonso, Jose Luis Moura, Luigi dell’Olio

Due to the issues of land redevelopment and changes of use within urban areas, many cities must adopt measures to reorganise and optimise parking space. This paper proposes a methodology to study one of them by implementing parking information systems (PIS). This solution offers users a competitive advantage by allowing them to know about the free parking spaces at the moment of decision-making. To achieve this goal, microscopic simulations are conducted to analyse the effects of various scenarios involving the implementation of PIS. The data used in these simulations is obtained from the Santander area in Spain. For the evaluation of results, a methodology has been developed that combines the evaluation of social factors for citizens and operational impacts for decision-makers. The results show significant improvements with increasing user information rate, e.g., the number of unsuccessful parking attempts before finding a final parking space is reduced by 55%, and 37% less particulate pollutants are emitted into the atmosphere.

由于城市区域内的土地重建和用途改变问题,许多城市必须采取措施重组和优化停车空间。本文提出了一种通过实施停车信息系统(PIS)来研究其中一个问题的方法。这种解决方案能让用户在做出决策时了解空闲停车位的情况,从而为用户提供竞争优势。为实现这一目标,本文进行了微观模拟,以分析实施 PIS 的各种方案的影响。模拟中使用的数据来自西班牙桑坦德地区。为了对结果进行评估,我们开发了一种方法,将对公民的社会因素评估和对决策者的操作影响评估结合起来。结果表明,随着用户信息率的提高,情况有了明显改善,例如,在找到最终停车位之前尝试停车失败的次数减少了 55%,排放到大气中的颗粒污染物减少了 37%。
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引用次数: 0
Upgrading in ride-sourcing markets with multi-class services 通过多级服务提升乘车外包市场的水平
IF 5.2 2区 工程技术 Q1 Social Sciences Pub Date : 2024-06-12 DOI: 10.1016/j.tbs.2024.100845
Xiaoran Qin , Hai Yang , Wei Liu

Most ride-sourcing platforms, exemplified by industry leaders like Uber, Lyft, and Didi, provide a range of ride services tailored to the diverse preferences of their passengers. Passengers, driven by their distinct priorities, may opt for high-class (HC) ride services, such as Luxury rides, if they value service quality, while those more cost-conscious may gravitate toward low-class (LC) ride services, including basic solo and shared rides. However, this market fragmentation can manifest as an excess of HC vehicles idly cruising the streets, while an insufficient number of LC vehicles struggle to meet passenger demand for LC services. To mitigate this issue, upgrading strategy is proposed where some LC vehicle requests are elevated to HC ride services without incurring additional charges. This study embarks on an initial exploration of the impacts of upgrading within the ride-sourcing system. We develop a mathematical model to depict the equilibrium conditions and analyze the collective influence of operational strategies, encompassing upgrading, spatial pricing, and vehicle repositioning, on system performances. Our research identifies scenarios in which the platform should employ these strategies to balance supply and demand and curb superfluous idle vehicle movements, supported by both theoretical and numerical analyses. The results offer operational insights that guide platform decisions, allowing them to adapt their strategies effectively in response to various supply–demand dynamics.

以 Uber、Lyft 和滴滴等行业领导者为例,大多数乘车外包平台都根据乘客的不同偏好提供一系列乘车服务。乘客在不同优先级的驱动下,如果看重服务质量,可能会选择高级(HC)乘车服务,如豪华乘车,而那些更注重成本的乘客可能会倾向于低级(LC)乘车服务,包括基本的单人和共享乘车。然而,这种市场分割可能表现为过多的豪华车在街上闲逛,而低等车数量不足,难以满足乘客对低等车服务的需求。为缓解这一问题,本研究提出了升级策略,将部分低碳车辆请求升级为高碳车辆搭乘服务,而无需支付额外费用。本研究开始初步探讨升级对乘车外包系统的影响。我们建立了一个数学模型来描述平衡条件,并分析了运营策略(包括升级、空间定价和车辆重新定位)对系统性能的集体影响。在理论和数值分析的支持下,我们的研究确定了平台应在哪些情况下采用这些策略来平衡供需,并遏制多余的闲置车辆移动。研究结果提供了指导平台决策的操作见解,使平台能够有效地调整策略,应对各种供需动态。
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引用次数: 0
A mobility pilot development process experimented through a MaaS pilot in Budapest 通过在布达佩斯开展 MaaS 试点,对移动试点开发流程进行试验
IF 5.2 2区 工程技术 Q1 Social Sciences Pub Date : 2024-06-12 DOI: 10.1016/j.tbs.2024.100846
Attila Aba, Domokos Esztergár-Kiss

Recently, several new concepts and innovative technologies have emerged to overcome the problems of urbanization, which can be hardly solved with using exclusively private vehicles or conventional public transport services. One of the new solutions is the Mobility-as-a-Service (MaaS) concept, a user-centric mobility distribution scheme, in which the user needs are satisfied via a single platform, and multiple transport options are offered by one MaaS operator (MO). In the last years, a couple of MaaS pilots were performed, but previous papers fail to focus on the pilot development and the proper description of the minimum viable product. A pilot of MaaS in Budapest has been developed by using the innovative Scrum methodology successfully involving six mobility service providers, such as public transport, shared mobility, and taxi, in the live demonstration. Current article provides detailed information about the pilot development including technical, legal, and business use cases for all service providers. The results of the recruitment and the characterization of the early-bird users are presented, too. The iterative pilot development process can be utilized by those MOs and governmental organizations that would like to initiate a new mobility project based on the MaaS concept.

最近,出现了一些新概念和创新技术,以克服城市化过程中遇到的问题,这些问题仅靠私家车或传统的公共交通服务很难解决。其中一种新的解决方案是 "移动即服务"(MaaS)概念,这是一种以用户为中心的移动分配方案,通过单一平台满足用户需求,并由一个 MaaS 运营商(MO)提供多种交通选择。在过去几年中,已经进行了一些 MaaS 试点,但之前的论文并未关注试点开发和对最小可行产品的适当描述。布达佩斯的 MaaS 试点项目采用创新的 Scrum 方法进行开发,成功吸引了公共交通、共享交通和出租车等六家移动服务提供商参与现场演示。本文提供了试点开发的详细信息,包括所有服务提供商的技术、法律和业务用例。文章还介绍了早期用户的招募结果和特征。那些希望基于 MaaS 概念启动新移动项目的部委和政府组织可以利用迭代试点开发流程。
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引用次数: 0
Social demographics imputation based on similarity in multi-dimensional activity-travel pattern: A two-step approach 基于多维活动-旅行模式相似性的社会人口统计学估算:两步法
IF 5.2 2区 工程技术 Q1 Social Sciences Pub Date : 2024-06-10 DOI: 10.1016/j.tbs.2024.100843
Bin Zhang , Soora Rasouli , Tao Feng

In response to the absence of demographics in increasingly emerging big data sets, we propose a novel method for inferring the missing demographic information based on similarity in people’s daily multi-dimensional activity-travel patterns as well as the characteristics of the area they move about. Instead of using isolated activity-travel attributes to infer social demographic features, our proposed method first calculates the similarity of people’s multidimensional daily activities and travels as well as characteristics of their visiting locations, between those for whom the social demographics are to be imputed (target) and those with known demographics (base) using a polynomial function. The weights of the function are determined using the permutation feature importance method, and then dynamic time warping is used to align the multidimensional activity sequences of the base and target sample and measure their similarities. For each person in the target database, a matched list is created consisting of those with the most similar activity-travel sequences in the base sample. A support vector machine is then trained using the base sample as input to impute the demographics of the target sample. The proposed model is trained using a national travel survey and validated by applying it to a GPS dataset. The results show that the proposed method outperforms existing methods in predicting four selected demographics: gender, age, education level, and work status, with an accuracy range between 91% and 94% for the national dataset and 88% to 91% for the GPS data. This study highlights the importance of considering the multidimensional and sequential nature of peoples’ daily activity-travel patterns in the imputation of demographic features.

针对越来越多的新兴大数据集中缺乏人口统计信息的问题,我们提出了一种新方法,根据人们日常多维活动-旅行模式的相似性以及他们活动区域的特征来推断缺失的人口统计信息。我们提出的方法不是使用孤立的活动-旅行属性来推断社会人口特征,而是首先使用多项式函数计算需要推断社会人口特征的人群(目标人群)和已知人口特征的人群(基数人群)之间的多维日常活动和旅行的相似性,以及他们访问地点的特征。该函数的权重是通过置换特征重要性法确定的,然后使用动态时间扭曲法将基础样本和目标样本的多维活动序列对齐,并测量它们的相似性。针对目标数据库中的每个人,创建一个匹配列表,该列表由基础样本中活动-旅行序列最相似的人组成。然后使用基础样本作为输入对支持向量机进行训练,以推测目标样本的人口统计学特征。建议的模型使用全国旅行调查进行训练,并通过将其应用于 GPS 数据集进行验证。结果表明,在预测四个选定的人口统计数据(性别、年龄、教育水平和工作状况)方面,所提出的方法优于现有方法,全国数据集的准确率在 91% 到 94% 之间,GPS 数据的准确率在 88% 到 91% 之间。这项研究强调了在估算人口特征时考虑人们日常活动-旅行模式的多维性和连续性的重要性。
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Travel Behaviour and Society
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