Junsik Park , Sungtaek Choi , Gurjoong Kim , Hanghun Jo
{"title":"Provision of metropolitan demand responsive transit and attitude’s role in mode choice","authors":"Junsik Park , Sungtaek Choi , Gurjoong Kim , Hanghun Jo","doi":"10.1016/j.trd.2025.104640","DOIUrl":"10.1016/j.trd.2025.104640","url":null,"abstract":"<div><div>The present study establishes the concept of demand responsive transit for metropolitan travel (M-DRT) and explores commuters’ mode choice to identify the role of attitudinal characteristics in the Seoul metropolitan area. We develop two discrete choice models (multinomial logit and integrated choice and latent variable models) using a dataset from a web-based stated preference survey. The result shows that unobserved psychological constructs (<em>car-oriented</em>, <em>positive perception on M-DRT</em>, and <em>life satisfaction</em>) play a crucial role in defining mode utility. Specifically, those who are dissatisfied with daily life such as commuting, recreation, and social interaction are likely to prefer M-DRT over traditional alternatives. Also, time valuation (particularly in-vehicle time) for the on-demand mode is significantly lower than those for others, resulting from the productive onboard environment. Based on the findings, we draw insights on the nature of M-DRT, operational strategies, treatment of psychological variables, and the future of the hands-free mode era.</div></div>","PeriodicalId":23277,"journal":{"name":"Transportation Research Part D-transport and Environment","volume":"140 ","pages":"Article 104640"},"PeriodicalIF":7.3,"publicationDate":"2025-02-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143394361","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Toward greener transit: Carbon-efficient density thresholds for public transit vs. private vehicles","authors":"Bumsoo Lee , Sungwon Lee","doi":"10.1016/j.trd.2025.104641","DOIUrl":"10.1016/j.trd.2025.104641","url":null,"abstract":"<div><div>Despite its potential as a sustainable transportation mode, public transit in many low-density urban and suburban areas in the U.S often generates more CO<sub>2</sub> <!-->emissions per passenger-mile than privately operated vehicles (POVs), primarily due to low ridership and passenger loads. Using Gradient Boosting Decision Trees (GBDT) and spline regression models, this study investigates the non-linear relationship between population density and the relative carbon efficiency of transit compared to POVs across the 136 largest U.S. urban areas. This study found that the minimum density required for public transit to be more carbon-efficient than driving, while controlling for other factors, is around the lowest 10th<!--> <!-->percentile of population-weighted density (PWD)—approximately 3.4 persons per acre. Further, a critical density threshold was identified at around the 80th<!--> <!-->percentile of PWD, about 8.6 persons per acre, beyond which the positive impact of population density on transit’s carbon efficiency significantly shifts up.</div></div>","PeriodicalId":23277,"journal":{"name":"Transportation Research Part D-transport and Environment","volume":"140 ","pages":"Article 104641"},"PeriodicalIF":7.3,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143378420","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"From research to roadmaps: Electric vehicle studies driving sustainable policy frameworks","authors":"Hira Tahir , Sami El-Ferik , Muhammad Tayyab","doi":"10.1016/j.trd.2025.104645","DOIUrl":"10.1016/j.trd.2025.104645","url":null,"abstract":"<div><div>Achieving sustainable development goals requires transformative approaches, with transportation offering significant decarbonization potential. While electric vehicle (EV) research has grown rapidly, early studies focused on bibliometric trends or impact of policies on EV adoption, neglecting the <em>reverse dynamic—how research shapes policy</em>. This paper fills this gap by analyzing how EV research influences policy using a methodological framework. A dataset of 44,246 Scopus articles, cross-referenced with Overton database quantifies the policy impact of EV research, identifying key contributors such as influential journals (<em>Transportation Research Part A & D, Energy Policy</em>), authors, and countries. Our findings reveal that articles on cost comparisons, environmental metrics, and integration solutions hold significant policy influence despite low traditional citation counts. Topic modeling highlights policy resonance in studies on battery technology, emission reduction, and grid integration. This work advocates for multi-metric approaches, combining bibliometric and policy impact assessments, to advance science-policy studies and drive societal change.</div></div>","PeriodicalId":23277,"journal":{"name":"Transportation Research Part D-transport and Environment","volume":"140 ","pages":"Article 104645"},"PeriodicalIF":7.3,"publicationDate":"2025-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143386999","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yuanyuan Wang , Ruguo Fan , Jinchai Lin , Xiao Xie , Wenjie Zhang , Dipti Srinivasan
{"title":"Subsidies for shared private electric vehicle chargers: A three-level Stackelberg game analysis","authors":"Yuanyuan Wang , Ruguo Fan , Jinchai Lin , Xiao Xie , Wenjie Zhang , Dipti Srinivasan","doi":"10.1016/j.trd.2025.104626","DOIUrl":"10.1016/j.trd.2025.104626","url":null,"abstract":"<div><div>Currently, governments and platforms are exploring subsidy schemes to encourage private charging pile sharing (PCPS), which is essential for the sustainable development of the electric vehicle industry. Nonetheless, the specific modes and their impacts on stakeholders’ decision-making remain unclear. We establish a three-level Stackelberg game model to analyze the interactions among government, platform, and private charger owners. Four practice-driven modes are proposed: both government and platform provide subsidies (BS), government provides subsidies (GS), platform provides subsidies (PS), and no subsidy (NS). Results reveal that BS works better when platform revenue increases, while GS performs better when government revenue rises; Enhancing PCPS benefits and data value promotes cost-effectiveness in BS and GS modes. Conversely, raising platform service fees hinders PCPS and reduces effectiveness; As platform revenue grows, platforms provide subsidies spontaneously, enabling the gradual withdrawal of government subsidies. These findings offer practical insights for policymakers to design targeted<!--> <!-->and efficient subsidies.</div></div>","PeriodicalId":23277,"journal":{"name":"Transportation Research Part D-transport and Environment","volume":"140 ","pages":"Article 104626"},"PeriodicalIF":7.3,"publicationDate":"2025-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143349388","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Beifei Yuan , Fengming Tao , Yan Qin , Qihua Chen , Yangyang Su
{"title":"Can policy achieve the goal of cold chain logistics sustainable development?","authors":"Beifei Yuan , Fengming Tao , Yan Qin , Qihua Chen , Yangyang Su","doi":"10.1016/j.trd.2025.104607","DOIUrl":"10.1016/j.trd.2025.104607","url":null,"abstract":"<div><div>Policy interventions are essential for the sustainable development of cold chain logistics (CCL). However, understanding the influence relationships and interactions between policy instruments and CCL remains challenging. This study proposes an innovative methodological approach by integrating a two-way fixed effects model (FEM) with a multilayer perceptron (MLP), thereby addressing the nonlinearity, interactions, and interpretability of CCL policy effectiveness. This study examines 586 policy texts related to the sustainable development of CCL in China (2008–2022). The results indicate that: (1) While the effectiveness of CCL policies has generally increased, regional disparities in implementation remain. (2) Targets planning, financial support, and voluntary policies are pivotal in advancing CCL development. However, capacity building and compulsory policies have not demonstrated significant effects. (3) Scenario analysis indicates that combining multiple policies is most effective, followed by a voluntary policy-led strategy. These findings offer valuable insights for policymakers in future sustainable development planning.</div></div>","PeriodicalId":23277,"journal":{"name":"Transportation Research Part D-transport and Environment","volume":"140 ","pages":"Article 104607"},"PeriodicalIF":7.3,"publicationDate":"2025-02-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143276054","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Interdependency in transportation system resilience: Review and discussion","authors":"Siping Li , Yaoming Zhou , Fangni Zhang","doi":"10.1016/j.trd.2025.104618","DOIUrl":"10.1016/j.trd.2025.104618","url":null,"abstract":"<div><div>The growing interconnectivity of transportation infrastructures amplifies system interdependencies and significantly influences system resilience during disruptive events. While these dependencies can offer backup routes and ensure service continuity, they also heighten the risk of widespread disruptions following a single failure. This paper provides a thorough examination of the literature on interdependency and resilience in transportation systems. The discussion begins with an exploration of the forms of interdependency in both single-modal and multi-modal transportation systems, delving into their definitions and the methodologies employed for their modeling. Subsequently, the paper analyzes the dual-edged impact of interdependency on transportation resilience, considering both its potential to enhance robustness and its propensity to exacerbate the consequences of disruptions. The review concludes with an assessment of the current limitations in understanding and addressing these issues, proposing future research directions aimed at developing more resilient transportation systems.</div></div>","PeriodicalId":23277,"journal":{"name":"Transportation Research Part D-transport and Environment","volume":"140 ","pages":"Article 104618"},"PeriodicalIF":7.3,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143445822","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Understanding commuter preferences for shared autonomous electric vehicles in first-mile-last-mile scenario","authors":"Zhiwu Dong , Chuqiao Chen , Jinying Ouyang , Xiaoyu Yan , Chenlei Liao , Xiqun (Michael) Chen , Der-Horng Lee","doi":"10.1016/j.trd.2025.104621","DOIUrl":"10.1016/j.trd.2025.104621","url":null,"abstract":"<div><div>Urban transportation faces pressing challenges, especially in enhancing the efficiency of first-mile and last-mile (FMLM) connections. This study focuses on Shared Autonomous Electric Vehicles (SAEV) as a sustainable solution to integrate public transit with urban commuting needs. By employing a hybrid choice model, we analyze various commuter characteristics, including socio-demographic information, daily commuting characteristics, level of service (LOS) attributes, and latent psychological preferences. The results indicate that SAEV have significant potential to shift commuters from private car usage to more sustainable public transit options, particularly among young, single, middle-income urban residents, with young married women emerging as potential target users. However, the uncertainty of SAEV as an on-demand service could potentially deter users. This research underscores the critical role of understanding commuter preferences in urban transport planning, offering a nuanced approach to fostering sustainable mobility solutions that could significantly reduce urban congestion and enhance the efficiency of public transit systems.</div></div>","PeriodicalId":23277,"journal":{"name":"Transportation Research Part D-transport and Environment","volume":"140 ","pages":"Article 104621"},"PeriodicalIF":7.3,"publicationDate":"2025-02-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143276053","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Haotian Zhong, Peng Chen, Daniel Rodriguez-Roman, Erick Guerra
{"title":"Innovative mobilities","authors":"Haotian Zhong, Peng Chen, Daniel Rodriguez-Roman, Erick Guerra","doi":"10.1016/j.trd.2025.104639","DOIUrl":"10.1016/j.trd.2025.104639","url":null,"abstract":"","PeriodicalId":23277,"journal":{"name":"Transportation Research Part D-transport and Environment","volume":"140 ","pages":"Article 104639"},"PeriodicalIF":7.3,"publicationDate":"2025-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143445820","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Decarbonizing airport access: A review of landside transport sustainability","authors":"Srinath Mahesh, Simeon C. Calvert","doi":"10.1016/j.trd.2025.104625","DOIUrl":"10.1016/j.trd.2025.104625","url":null,"abstract":"<div><div>The demand for air transport has experienced rapid growth, raising significant environmental concerns. Previous studies on airport sustainability have mainly focussed on airside areas; while literature pertaining to landside transport sustainability and emissions reduction approaches is limited. This paper addresses this gap by presenting a comprehensive review and critical assessment of the existing studies aiming to inform policymakers and researchers. Based on a holistic approach and an interdisciplinary perspective, the reviewed literature is classified into four categories: travel behaviour, transport infrastructure, transport policy, and sustainability. Within these categories, key findings are identified, along with a concise overview of the strategies employed by large airports to achieve their net-zero targets. Main solutions include increasing the attractiveness of public transport, providing electric vehicle (EV) infrastructure, and promoting low/zero emission vehicles. Moreover, the exploration of innovative fuel technologies (such as hydrogen), fast-charging EVs, and autonomous shuttle buses also has immense potential.</div></div>","PeriodicalId":23277,"journal":{"name":"Transportation Research Part D-transport and Environment","volume":"140 ","pages":"Article 104625"},"PeriodicalIF":7.3,"publicationDate":"2025-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143276055","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Who is aging in the wrong place? evidence from older Americans","authors":"Shengxiao (Alex) Li","doi":"10.1016/j.trd.2025.104616","DOIUrl":"10.1016/j.trd.2025.104616","url":null,"abstract":"<div><div>Using data from the U.S. National Household Travel Survey 2017, this study examined who is <em>aging in the wrong place</em>, which I defined as someone who is aged 55 years or older living in a non-urban area without a vehicle. In particular, it explored whether age increases the odds of people living in low-density areas without vehicles, and, if not, what factors do. It also investigated differences of factors related to <em>aging in the wrong place</em> between those aged 75 years and older vis-à-vis those aged 55–64 and 65–74 years. Mixed logit models with random errors of residential location and vehicle ownership levels were applied for those aged 55 years and older and for selected age groups (i.e., 55–64, 65–74, and 75 years and older) to account for unobserved correlations between residential location and vehicle ownership decisions. Results suggested that age did not associate with the odds of <em>aging in the wrong place</em>. Instead, being unemployed (compared to being employed) and women living alone (compared to men living alone) were more likely to <em>age in the wrong place</em>. Additionally, the findings revealed that this phenomenon emerges among those aged 75 and older, but not among younger age groups. Moreover, older (compared with younger) African Americans, Hispanics, and those with low incomes were less likely to own cars and live in non-urban areas. This outcome is consistent across age groups (i.e., 55–64, 65–74, and 75 years and older) for Hispanics and those with low incomes, but not for African Americans aged 65 years and older. Study findings inform transportation service provision for individuals <em>aging in the wrong place</em>, as well as for disadvantaged older people living in urban areas.</div></div>","PeriodicalId":23277,"journal":{"name":"Transportation Research Part D-transport and Environment","volume":"140 ","pages":"Article 104616"},"PeriodicalIF":7.3,"publicationDate":"2025-02-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143276056","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}