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A micro-network within the port for vessel anchorage selection decision support 港口内用于船舶锚地选择决策支持的微型网络
IF 2.4 Q3 TRANSPORTATION Pub Date : 2024-10-22 DOI: 10.1016/j.cstp.2024.101310
Jiale Xiang , Chunhui Zhou , Junnan Zhao , Myo Ko Ko Latt , Kunlong Wen , Langxiong Gan
Upon arrival at ports, selecting the appropriate anchorage is a critical concern shared by ship captains and port managers. This study aims to exploit the rich geographic and semantic information embedded in historical ship trajectory data to construct a micro-network of port elements and employ network analysis techniques to mine spatial service relationships among port elements, thereby establishing an Anchorage Selection Decision Support (ASDS) model. This process involves extracting vessels’ dwell location information within ports from trajectory data and using this information and its sequence to establish an Anchorages-Berths Micro-Network (ABMN) in port. By applying association rule mining techniques, this research reveals the spatial service relationships within the micro-network between anchorages and berths, and integrates relevant indicators to develop the ASDS model. The aim is to help pilots of approaching vessels in making more rational anchorage choices, thus optimizing the operational efficiency of vessels in ports. The effectiveness of this approach has been validated through experiments conducted in the research region at the Nanjing port of the Yangtze River. This research is significant for exploring the correlation between port anchorages and berths, as well as for selecting appropriate anchorages for vessels arriving at the port.
抵达港口后,选择合适的锚地是船长和港口管理者共同关心的重要问题。本研究旨在利用历史船舶轨迹数据中蕴含的丰富地理和语义信息,构建港口要素微观网络,并运用网络分析技术挖掘港口要素之间的空间服务关系,从而建立锚地选择决策支持(ASDS)模型。这一过程包括从轨迹数据中提取船舶在港口内的停留位置信息,并利用这些信息及其序列建立港口锚地-泊位微网络(ABMN)。通过应用关联规则挖掘技术,本研究揭示了锚地和泊位微网络内的空间服务关系,并整合了相关指标以开发 ASDS 模型。其目的是帮助进港船舶引航员更合理地选择锚地,从而优化船舶在港口的运营效率。该方法的有效性已通过在长江南京港研究区域进行的实验得到验证。这项研究对于探索港口锚地与泊位之间的相关性,以及为到港船舶选择合适的锚地具有重要意义。
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引用次数: 0
Towards socially equitable public transport systems: The effect of COVID-19 on taxi trip behavior 实现社会公平的公共交通系统:COVID-19 对出租车出行行为的影响
IF 2.4 Q3 TRANSPORTATION Pub Date : 2024-10-15 DOI: 10.1016/j.cstp.2024.101305
Ilgin Gokasar , Ece Ozcan , Muhammet Deveci
The COVID-19 pandemic emerged as a very influential occurrence with a profound impact on a global scale. The onset of the pandemic abruptly disrupted the regular course of everyday activities, primarily impacting urban regions. Hence, it is imperative to understand the effects of the COVID-19 pandemic on modern urban areas. This study seeks to analyze the effect of the pandemic on travel behavior by utilizing GPS data obtained from taxis, with a specific focus on spatial socioeconomic features. The M2 metro line in Istanbul has been selected for evaluation. In this analysis, four distinct periods are considered: total, off-peak, morning, and evening peaks. The stations are categorized using K-means clustering. The estimation models are constructed using ordinary least squares (OLS), spatial autoregression (SAR), and geographically weighted regression (GWR) techniques, which are applied to the variation in daily average cab trips and the characteristics of stations. The GWR models provide superior performance in comparison to the other two models, with notable distinctions observed in peak times, particularly morning peak when compared to total and off-peak counts. The findings indicate that factors such as population, population density, socioeconomic status, and the quantity of shopping malls are influential variables in elucidating and forecasting the fluctuations in taxi trip counts.
COVID-19 大流行是一次极具影响力的事件,在全球范围内产生了深远的影响。大流行病的爆发突然打乱了日常活动的正常进程,主要影响到城市地区。因此,了解 COVID-19 大流行对现代城市地区的影响势在必行。本研究试图利用从出租车上获取的 GPS 数据分析大流行病对出行行为的影响,并特别关注空间社会经济特征。伊斯坦布尔的 M2 地铁线被选作评估对象。在分析中,考虑了四个不同的时段:总高峰、非高峰、早高峰和晚高峰。车站采用 K 均值聚类法进行分类。利用普通最小二乘法(OLS)、空间自回归(SAR)和地理加权回归(GWR)技术构建了估算模型,并将其应用于日均出租车出行量的变化和车站的特征。与其他两种模型相比,地理加权回归模型具有更优越的性能,在高峰时段,特别是早高峰与总计数和非高峰计数相比,观察到明显的差异。研究结果表明,人口、人口密度、社会经济地位和购物中心数量等因素是阐明和预测出租车出行次数波动的影响变量。
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引用次数: 0
Preferable price to buy an electric two-wheeled vehicle for college students 大学生购买电动两轮车的优惠价格
IF 2.4 Q3 TRANSPORTATION Pub Date : 2024-10-14 DOI: 10.1016/j.cstp.2024.101307
Rong-Chang Jou , Tzu-Ying Chen , David Hensher
This research delves into the determinants affecting Taiwanese college students’ purchasing behavior towards two-wheeled electric vehicles (ETWVs) and the financial allocation they are willing to commit. A choice experiment design was utilized, with a sample of approximately 900 college students, regular users of two-wheeled gasoline vehicles (TWGs). The students engaged in one of two choice scenarios, presented with general characteristics, operational efficiency, vehicle cost, and subsidy strategies. Subsequent to the scenarios, respondents indicated their willingness to pay (WTP) for a ETWV. ETWVs, apart from being an emerging transportation alternative, also present potential environmental and health benefits due to reduced air pollution. The dependent inverse hyperbolic sine (IHS) double-hurdle model was employed, facilitating the accommodation of heteroscedasticity and correlated normality. The outcomes suggest that purchasing behavior for ETWVs among college students is shaped by factors such as purchase subsidy, tax breaks, and ETWVs’ capability in supporting students’ external travel requirements. The average WTP for ETWVs among this demographic stands at US$ 1,410. Importantly, the dependent IHS double-hurdle model, considering heteroscedasticity, proved statistically superior to its counterparts. Insights from this research offer crucial information on the price range students are likely to accommodate for ETWVs and provide a foundation for framing incentive-driven policies to amplify ETWV adoption.
本研究探讨了影响台湾大学生购买两轮电动车(ETWV)行为的决定因素以及他们愿意投入的资金分配。本研究采用了选择实验设计,以约 900 名经常使用两轮汽油车(TWGs)的大学生为样本。学生们在两种选择情景中选择一种,情景包括一般特征、运行效率、车辆成本和补贴策略。在情景模拟之后,受访者表示了他们对 ETWV 的支付意愿(WTP)。ETWV 除了是一种新兴的交通替代方式外,还能减少空气污染,带来潜在的环境和健康益处。研究采用了依赖性反双曲线正弦(IHS)双阶跃模型,以适应异方差和相关正态性。研究结果表明,大学生购买 ETWV 的行为受购买补贴、税收减免以及 ETWV 支持学生校外出行需求的能力等因素的影响。这一人群对 ETWV 的平均 WTP 为 1,410 美元。重要的是,考虑到异方差性,依赖性 IHS 双轮模型在统计上优于同类模型。这项研究提供了关于学生可能接受的 ETWV 价格范围的重要信息,并为制定激励性政策以扩大 ETWV 的采用提供了基础。
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引用次数: 0
Analysis of relationship between railway satisfaction and delay tolerance 铁路满意度与延迟容忍度之间的关系分析
IF 2.4 Q3 TRANSPORTATION Pub Date : 2024-10-13 DOI: 10.1016/j.cstp.2024.101306
Xueqing Bo , Shintaro Terabe , Hideki Yaginuma , Kosuke Tanaka , Haruka Uno
Railway facilities, which are part of the service environment, may affect passenger delay tolerance during delays. With the increasing frequency of railway delays, it is essential for railway companies to understand how passengers perceive these disruptions and railway facilities. While previous studies have examined the relationship between satisfaction and tolerance in interpersonal relationships, less is known about the impact of service environments, such as railway facilities, on perceptions in transportation settings. This study investigates the relationship between passenger satisfaction with railway facilities and their tolerance of delays in hypothetical scenarios, covering both short and long delays during morning and evening commute. The results of structural equation modeling show that railway satisfaction positively affects delay tolerance, while anxiety caused by unclear information during delays negatively affects tolerance. Additionally, the study identified the facility improvements that would enhance service quality. These findings offer actionable insights for railway companies to mitigate the impact of delays and improve passenger experiences.
铁路设施是服务环境的一部分,可能会影响乘客对延误的容忍度。随着铁路延误日益频繁,铁路公司有必要了解乘客如何看待这些干扰和铁路设施。以往的研究探讨了人际关系中的满意度和容忍度之间的关系,但对于铁路设施等服务环境对交通环境中的感知的影响却知之甚少。本研究调查了乘客对铁路设施的满意度与他们在假设情景下对延误的容忍度之间的关系,假设情景包括早晚通勤期间的短时和长时延误。结构方程模型的结果表明,铁路满意度会对延误容忍度产生积极影响,而延误期间信息不明确所导致的焦虑则会对容忍度产生消极影响。此外,研究还确定了可提高服务质量的设施改进措施。这些发现为铁路公司减轻延误影响和改善乘客体验提供了可操作的见解。
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引用次数: 0
The operational dynamics of end-around taxiways: Insights from Istanbul Airport 末端环形滑行道的运行动态:伊斯坦布尔机场的启示
IF 2.4 Q3 TRANSPORTATION Pub Date : 2024-10-10 DOI: 10.1016/j.cstp.2024.101303
Kadir Dönmez
The rapid rise in global air traffic poses significant challenges for airports, particularly in maintaining operational safety and efficiency. One of the main issues is the risk of runway crossings during ground movements, which can lead to runway incursions. This is particularly problematic in airports with parallel runway operations, where managing multiple runways and ground movements is more complex. End-Around Taxiways (EATs) have been introduced as a strategic solution to mitigate these risks. However, their implementation also introduces new operational challenges and complexities. This study evaluates the impact of EATs on Istanbul Airport (LTFM), one of Europe’s busiest airports. Using Automatic Dependent Surveillance-Broadcast (ADS-B) data, the research examines the use of EATs in taxi times, acceleration counts and durations, stop-and-go counts, level-off times, hot spots, gate and stand usages by developing new catchment algorithms. The findings show that EATs present operational challenges such as increased taxi times, number of acceleration movements, and level off times. The study emphasizes the need to consider local airport configurations when implementing EATs and suggests new constraints to optimize their usage.
全球航空交通量的快速增长给机场带来了巨大挑战,尤其是在维护运行安全和效率方面。其中一个主要问题是地面移动过程中穿越跑道的风险,这可能会导致跑道入侵。在平行跑道运行的机场,这一问题尤为突出,因为在这些机场,管理多条跑道和地面移动更为复杂。末端环形滑行道(EAT)作为一种战略解决方案被引入,以降低这些风险。然而,其实施也带来了新的运营挑战和复杂性。本研究评估了 EAT 对欧洲最繁忙机场之一的伊斯坦布尔机场(LTFM)的影响。研究使用自动监视广播(ADS-B)数据,通过开发新的捕获算法,检查了 EATs 在滑行时间、加速次数和持续时间、停靠次数、平飞时间、热点、登机口和停机位使用方面的使用情况。研究结果表明,EAT 带来了运营方面的挑战,如出租车时间、加速运动次数和平层关闭时间的增加。研究强调,在实施 EATs 时需要考虑当地机场的配置,并提出了优化其使用的新约束条件。
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引用次数: 0
Quantifying the external costs of autonomous on-demand ride pooling services 量化自主按需拼车服务的外部成本
IF 2.4 Q3 TRANSPORTATION Pub Date : 2024-10-09 DOI: 10.1016/j.cstp.2024.101302
Daniel Schröder , Mor Kaspi
Mobility On Demand (MOD) services, such as ride-pooling, provide convenient and cost-effective transportation options. While previous studies focused on operational costs and service quality, we take a broader perspective by examining the external costs associated with autonomous ride-pooling services. Incorporating external costs into the design and evaluation of MOD services enables a comprehensive understanding of their impact on the entire urban population, informing effective regulations and incentives. We present an approach for calculating space-varying external costs, accounting for factors like air pollution, climate impact, noise and accidents. These costs are integrated into FleetPy, an agent-based simulation tool for ridesharing analysis and optimization. A case study in Munich uncovers the tradeoffs between external costs, internal costs, and service quality. Our findings suggest that mid-sized vehicles with a three-person capacity strike a balance between energy efficiency and transport capacity. By applying our approach, external costs can be reduced by up to 37%.
按需移动(MOD)服务,如拼车,提供了便捷且经济高效的交通选择。以往的研究侧重于运营成本和服务质量,而我们则从更广阔的视角出发,研究了与自主拼车服务相关的外部成本。将外部成本纳入 MOD 服务的设计和评估中,可以全面了解其对整个城市人口的影响,从而制定有效的法规和激励措施。我们提出了一种计算空间变化外部成本的方法,其中考虑了空气污染、气候影响、噪音和事故等因素。这些成本被整合到基于代理的模拟工具 FleetPy 中,用于共享出行的分析和优化。慕尼黑的一项案例研究揭示了外部成本、内部成本和服务质量之间的权衡。我们的研究结果表明,可容纳三人的中型车辆可以在能源效率和运输能力之间取得平衡。采用我们的方法,外部成本最多可降低 37%。
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引用次数: 0
Cost benefit analysis of reducing speed limits in Athens to 30 Km/h 将雅典车速限制降至 30 公里/小时的成本效益分析
IF 2.4 Q3 TRANSPORTATION Pub Date : 2024-10-02 DOI: 10.1016/j.cstp.2024.101289
Stella Roussou, Virginia Petraki, Katerina Deliali, Armira Kontaxi, George Yannis
The objective of this research is to investigate public acceptance and socio-economic feasibility of reducing speed limit from 50 km/h to 30 km/h in certain parts of the road network of Athens, Greece. A questionnaire was developed based on the method of stated preference for various hypothetical scenarios of time, fuel consumption and the probability of road crash to investigate road user preferences towards the reduction of speed limit and identify the most important influencing factors preferences. A total of 408 respondents were asked to choose among three alternative proposals: a) Reduce the speed limit to 30 km/h throughout the urban network except on major arteries, b) Reduce the speed limit to 30 km/h throughout the urban network and c) No Reduction (do nothing). For the analysis, two binomial logistic regression models and two multinomial logistic regression models were developed. The results indicate that increase in travel time, the importance of speed in causing a crash, the number of crashes the user has been involved in, the respondent’s driving habits are the main determinants of the users’ preferences. Furthermore, a Cost Benefit Analysis (CBA) was conducted to understand the sustainability implications of the implementation of lower speed limits (i.e., 50 to 30 km/h). In terms of socio-economic impacts, the CBA considered safety-related metrics, namely the number of road casualties of all severity levels, and environmental-related metrics, namely reductions in CO2, NOx, PM levels as well as in road user surplus metrics namely travel time increase and fuel consumption reduction. Costs considered in the analysis result from increased time spent on the road. Consequently, the investment and the operational costs along with the socio-economic impact are estimated and monetized, up to the year 2030. The positive Net Present Value (NPV) and the high Internal Rate of Return (IRR), i.e. 64.5 %, obtained as well as the sensitivity analysis results, indicate the feasibility of this policy over time. Therefore, speed limit reductions are economically viable and so, should be encouraged.
本研究的目的是调查希腊雅典公路网某些路段的车速限制从 50 公里/小时降至 30 公里/小时的公众接受度和社会经济可行性。根据时间、油耗和道路交通事故概率等各种假设情况的陈述偏好法编制了一份调查问卷,以调查道路使用者对降低车速限制的偏好,并确定最重要的影响偏好的因素。共有 408 名受访者被要求在以下三个备选方案中做出选择:a) 除主要干道外,将整个城市网络的车速限制降低至每小时 30 公里;b) 将整个城市网络的车速限制降低至每小时 30 公里;c) 不降低车速限制(什么都不做)。为进行分析,建立了两个二叉逻辑回归模型和两个多叉逻辑回归模型。结果表明,旅行时间的增加、车速对造成车祸的重要性、用户参与车祸的次数、受访者的驾驶习惯是用户偏好的主要决定因素。此外,还进行了成本效益分析(CBA),以了解实施较低车速限制(即从 50 公里/小时降至 30 公里/小时)对可持续发展的影响。在社会经济影响方面,成本效益分析考虑了与安全相关的指标,即各种严重程度的道路伤亡人数,以及与环境相关的指标,即二氧化碳、氮氧化物、可吸入颗粒物水平的降低,以及道路使用者剩余指标,即旅行时间的增加和燃料消耗的减少。分析中考虑的成本来自于道路上花费时间的增加。因此,对投资和运营成本以及社会经济影响进行了估算和货币化,直至 2030 年。净现值(NPV)为正值,内部收益率(IRR)较高,即 64.5%,这些数据以及敏感性分析结果表明,随着时间的推移,该政策是可行的。因此,降低车速限制在经济上是可行的,应予以鼓励。
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引用次数: 0
Impact of high-speed railway construction on freight capacity on sections of existing railways- A case on the Yangtze River Delta 高速铁路建设对既有铁路路段货运能力的影响--以长江三角洲为例
IF 2.4 Q3 TRANSPORTATION Pub Date : 2024-09-26 DOI: 10.1016/j.cstp.2024.101301
Chuanzhong Yin, Xiaoxue Feng
The construction of high-speed railway (HSR) can effectively release the freight capacity of existing railways. By analyzing the influencing factors of passengers’ travel choices, the Utility Function and Logit model are adopted to calculate the utility and passenger flow split rate, and get the passenger flow of the existing railways after the diversion of the newly-built HSR. The passenger flow allocation model is established based on User Equilibrium, and improved Frank-Wolfe (FW) algorithm is applied to solve it, and obtain the passenger capacity of the sections on existing railways. Based on the deduction coefficient method, the passenger capacity is deducted from total capacity to get the freight capacity of each section on existing railways after release. Finally, take the railway channel in the Yangtze River Delta as a case, the results show that after the construction of the HSR, the freight capacity of sections on existing railways in the Yangtze River Delta is released to varying degrees. The freight capacity of Hefei-Wuhu section will be released the most, which is 19.5 pairs of trains, while that of Shanghai-Jiaxing section is the least, which is only 3.5 pairs, following by Wenzhou-Jinhua and Hangzhou-Ningbo sections, which are 4 pairs. Therefore, the construction of HSR should be accompanied by focusing on sections with less released freight capacity to enhance the overall capacity of the regional railway network.
高速铁路的建设可以有效释放既有铁路的货运能力。通过分析旅客出行选择的影响因素,采用效用函数和 Logit 模型计算效用和客流分流率,得到新建高铁分流后既有铁路的客流情况。建立基于用户均衡的客流分配模型,并采用改进的 Frank-Wolfe (FW) 算法进行求解,得到既有铁路各区段的客运能力。根据扣除系数法,从总运力中扣除客运运力,得到放行后既有铁路各区段的货运运力。最后,以长三角铁路通道为例,结果表明,高铁建成后,长三角既有铁路各区段货运能力均有不同程度的释放。其中,合肥至芜湖段的货运能力释放最多,为 19.5 对列车;上海至嘉兴段的货运能力释放最少,仅为 3.5 对列车;其次是温州至金华段和杭州至宁波段,均为 4 对列车。因此,在建设高铁的同时,应重点关注货运能力释放较少的区段,以提高区域铁路网的整体运能。
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引用次数: 0
Evaluating private car users’ preference to congestion pricing: A study on trip cancellation behavior 评估私家车用户对拥堵费的偏好:关于取消行程行为的研究
IF 2.4 Q3 TRANSPORTATION Pub Date : 2024-09-25 DOI: 10.1016/j.cstp.2024.101300
Sedigheh KhorramDehnavi , Ali MorovatiSharifabadi , Salman AghidiKheyrabadi , Seyed Mojtaba HosseiniBamakan
People show different behaviors when facing congestion pricing policy. A literature review reveals that the variables affecting behaviors such as trip cancellation in the case of the implementation of transportation demand management (TDM) policies have received less attention. Therefore, the present study aimed to investigate the effects of travelers’ characteristics, citizens’ attitudes towards TDM policies, socioeconomic variables, and five TDM policies on trip cancellation behavior among private car users entering congestion charge zones. The statistical population contained 2256 participants; each participant answered six scenarios resulting in 13,536 observations. The use of Stated Preference method is employed to identify the preferences of citizens of Shiraz as a case study. The binary logit model indicated that travelers who had to make essential trips would be less likely to cancel their trips. Also, those who strongly agreed with the idea that congestion pricing could restrict their travel mode choice and those who strongly disagreed that congestion pricing could reduce traffic congestion would be most likely to cancel their trips compared to people with other attitudes. In addition, every minute increase in the time spent in congestion charge zones could decrease the travelers’ tendency to cancel their trips by 0.13%. Likewise, every 10,000 Rials ($0.09) increase in congestion charge could increase the probability of trip cancellation by 0.31%.
人们在面对拥堵定价政策时会表现出不同的行为。文献综述显示,在实施交通需求管理(TDM)政策的情况下,影响取消行程等行为的变量受到的关注较少。因此,本研究旨在探讨出行者特征、市民对交通需求管理政策的态度、社会经济变量以及五项交通需求管理政策对私家车用户进入拥堵收费区取消行程行为的影响。统计人群包括 2256 名参与者,每位参与者回答了六个情景,共得到 13536 个观测值。以设拉子市民的偏好为研究案例,采用了陈述偏好法。二元对数模型表明,必须进行必要旅行的旅行者取消旅行的可能性较小。此外,与持其他态度的人相比,非常同意拥堵费可以限制其出行方式选择的人和非常不同意拥堵费可以减少交通拥堵的人最有可能取消出行。此外,在拥堵收费区所花费的时间每增加一分钟,就会使旅行者取消旅行的倾向降低 0.13%。同样,拥堵费每增加 10,000 里亚尔(0.09 美元),取消行程的可能性就会增加 0.31%。
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引用次数: 0
Hard and soft measures for motivating workers to commute by bicycle: The case of Bogota 激励工人骑自行车上下班的软硬措施:波哥大案例
IF 2.4 Q3 TRANSPORTATION Pub Date : 2024-09-21 DOI: 10.1016/j.cstp.2024.101299
Luis Márquez , Victor Cantillo , Carlos D. Paternina-Arboleda
Motivating workers to commute by bicycle could play a key role in reducing congestion, caring for the environment, helping maintain good health and fitness, and improving the well-being of urban societies. To achieve this behavioral change, it is crucial to understand the main factors that influence bicycle use. This study aims to understand the behavior of workers who do not commute by bicycle by integrating the theory of planned behavior (TPB) and social identity into a Hybrid Modal Shift model (HMS) to define measures to motivate them to commute by bicycle. We designed a stated choice experiment comprised of three tangible attributes (i.e., bike lane types, trip-end facilities, and cash incentives). Indicators related to psychological factors of the TPB and social identity, and choices of whether to switch current modes of transportation to the bicycle, were observed through a face-to-face questionnaire addressed to workers who do not commute by bicycle in Bogota, Colombia (N=376). The HMS allowed us to understand the effects of tangible attributes and psychological constructs on the probability of shifting current transportation modes to commuting by bicycle to work. We also obtained the effect of each socioeconomic characteristic on the overall choice of shifting to bicycles. Then, by considering the heterogeneity captured through the psychological constructs, we designed measures based on social identity and some psychological factors of the TPB involving these groups of workers to motivate them to commute by bicycle.
激励工人骑自行车上下班,可以在减少拥堵、爱护环境、帮助保持健康和体魄以及改善城市社会福祉方面发挥关键作用。要实现这一行为改变,了解影响自行车使用的主要因素至关重要。本研究旨在通过将计划行为理论(TPB)和社会认同融入混合模式转换模型(HMS),了解不骑自行车上下班的工人的行为,从而确定激励他们骑自行车上下班的措施。我们设计了一个由三个有形属性(即自行车道类型、出行终点设施和现金奖励)组成的陈述选择实验。通过对哥伦比亚波哥大不骑自行车上下班的工人(376 人)进行面对面问卷调查,观察了与 TPB 心理因素和社会认同相关的指标,以及是否将目前的交通方式改为骑自行车的选择。通过 HMS,我们了解了有形属性和心理结构对将目前的交通方式转变为骑自行车上下班的可能性的影响。我们还获得了每个社会经济特征对转向自行车的总体选择的影响。然后,考虑到通过心理结构捕捉到的异质性,我们设计了基于社会认同和 TPB 中涉及这些工人群体的一些心理因素的措施,以激励他们骑自行车上下班。
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引用次数: 0
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