Junyi Zhang

Junyi Zhang
Hiroshima University | HU · Graduate School of Advanced Science and Engineering; Graduate School for International Development and Cooperation

Prof., Dr. Eng.

About

295
Publications
37,886
Reads
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4,105
Citations
Introduction
His research fields include urban and regional planning, transportation planning, traffic engineering, environment and energy policies, tourism policy, and health policy (including pandemics) in the context of both developed and developing countries. He has developed various methodologies and applied them to analyze various issues related to the above fields from an interdisciplinary perspective. His research emphasizes life-oriented and systematic approaches.
Additional affiliations
October 2011 - February 2021
Hiroshima University
Position
  • Professor
Description
  • Graduate School of Advanced Science and Engineering was newly established by merging existing schools in April 2020.
October 2002 - September 2011
Hiroshima University
Position
  • Professor (Associate)

Publications

Publications (295)
Chapter
The experience of COVID-19 has shown that big data combined with advanced algorithms have a huge potential in supporting the fight against infectious diseases and pandemics. In China, big data on human mobility derived from smart sensors, integrated with detailed epidemiological data from patient interviews, have played an important role in the eff...
Chapter
The outbreak and spread of the COVID-19 pandemic has altered transport patterns in China, leading to significant changes in energy consumption and carbon dioxide (CO2) emissions. This study assessed the spatiotemporal characteristics of transport-related CO2 emissions at the provincial level in China during the COVID-19 pandemic. Provincial-level t...
Chapter
This book is a systematic collection about COVID-19 and various modes of transport (railways, road, air, waterway, walking and biking, shared mobility, etc.), logistics, and supply chains, economy and daily life, covering different geographical territories and cultures, from both academic and practical perspectives. Impacts of COVID-19 are widely i...
Chapter
In order to find a coordinated approach to support tourism recovery following the impacts of COVID-19, this research examines the experiences of mainland China, the first country whose domestic tourism recovered in the first stage (the first year after the pandemic outbreak). Through the content analysis of tourism policy documents at national, pro...
Chapter
The chapter of this book first emphasizes the urgency of a postpandemic transformation from perspectives of all aspects of sustainable development by learning lessons from pandemics and by reflecting the fact that there was about 2% of pandemic-related spending in the world’s largest 50 countries in 2020, which was directed to sustainable recovery...
Chapter
Social contacts are an important indicator to track the spread of pandemics and evaluate the effectiveness of policy interventions in specific settings. Using a retrospective survey, this chapter compared the reported contact patterns during the COVID-19 outbreak to contact patterns during the influenza period in leisure/tourism settings of four de...
Chapter
The COVID-19 pandemic has greatly disrupted human mobility and economic development globally. The built environment (BE) can contribute to the spread of COVID-19, as well as other infectious diseases, by facilitating human mobility and social contacts between infected and susceptible individuals. It can also provide a space that directly transmits...
Chapter
The world is battling the coronavirus disease 2019 (COVID-19) pandemic. However, pandemics such as COVID-19 are not entirely new phenomena in human history. Humans have always been fighting against infectious diseases since the Neolithic revolution, 12,000 years ago. Over the past few decades, however, new infectious diseases have been caused by su...
Chapter
The WCTRS (World Conference on Transport Research Society) COVID-19 Task Force implemented a worldwide expert survey between the end of April and late May 2020. Of 357 experts who participated in the survey, more than 100 experts provided their open opinions. Although time has passed since this survey, the situation of the COVID-19 pandemic at the...
Article
Full-text available
Aim: This study developed a risk scoring tool and examined its applicability using data from the Kihon Checklist cohort dataset for 19 months to predict the transition from no certification for long-term care to long-term care level 3 or above. Methods: Data were collected from 26 357 functionally independent, community-dwelling older adults in...
Article
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The built environment is a structural determinant of health. Here we reveal spatially heterogeneous associations of built environment indicators with objective health outcomes (morbidity) by combining a random forest (RF) approach and a multiscale geographically weighted (MGWR) regression method. Using data from six Japanese cities, we found that t...
Article
To control the COVID-19 pandemic, various policies have been implemented to restrict the mobility of people. Such policies, however, have resulted in huge damages to many economic sectors, especially the tourism sector and its auxiliary services. Focusing on Cambodia, this study presents a system dynamics (SD) model for assessing and selecting effe...
Article
Full-text available
The COVID-19 pandemic has caused various impacts on people’s lives, while changes in people’s lives have shown mixed effects on mitigating the spread of the SARS-CoV-2 virus. Understanding how to capture such two-way interactions is crucial, not only to control the pandemic but also to support post-pandemic urban recovery policies. As suggested by...
Article
The relationships between the built environment (BE) and car dependence have been thoroughly evaluated, with a primary focus on the residential BE; however, the effects of the BE at workplaces have remained largely unexplored. Little is known about the potential nonlinear effects of the BE at both locations. Using data from a household travel surve...
Article
Full-text available
The built environment can contribute to the spread of the novel coronavirus disease (COVID-19) by facilitating human mobility and social contacts between infected and uninfected individuals. However, mobility data capturing detailed interpersonal transmission at a large scale are not available. In this study, we aimed to objectively assess the infl...
Article
Full-text available
The novel coronavirus disease 2019 (COVID-19) crisis has influenced economies and societies across the globe and will thoroughly reshape our world as it continues to unfold. The pandemic is likely to trigger permanent long-term impacts on the transport sector in the post-COVID world. While a post-COVID “new normal” will be likely to incur negative...
Article
To design effective policies against COVID-19, there is a need for more evidence-based research. However, associations between actual policies and temporal behavior changes have remained underexplored. To fill this important research gap, a nationwide retrospective life-oriented panel survey on individuals’ behavior changes from April to September...
Article
This paper discusses the dual role of the transport sector in the Covid-19 pandemic: spreading the virus around the world and being most negatively impacted by the pandemic. This paper describes and analyzes the following: (a) actions taken by the governments and international community in order to control the spreading and to alleviate negative ec...
Article
This study attempts to provide scientifically-sound evidence for designing more effective COVID-19 policies in the transport and public health sectors by comparing 418 policy measures (244 are transport measures) taken in different months of 2020 in Australia, Canada, Japan, New Zealand, the UK, and the US. The effectiveness of each policy is measu...
Article
Full-text available
The world has suffered from the COVID-19 pandemic. While it is expected that societies will learn lessons from this experience, knowledge about how people responded to the pandemic in its early stages is very limited. With the aim of urgently providing policymakers with scientific evidence about how to better inform the public about fighting agains...
Article
Evidence of the association of built environment (BE) attributes with the spread of COVID-19 remains limited. As an additional effort, this study regresses a ratio of accumulative confirmed infection cases at the city level in China on both inter-city and intra-city BE attributes. A mixed geographically weighted regression model was estimated to ac...
Article
Full-text available
Impacts of coronavirus disease 2019 (COVID-19) on the transport sector and the corresponding policy measures are becoming widely investigated. Considering the various uncertainties and unknowns about this virus and its impacts (especially long-term impacts), it is critical to understand opinions and suggestions from experts within the transport sec...
Article
Full-text available
The effects of the built environment (BE) on modes of transport have been extensively evaluated in the literature with a primary focus on the neighborhood-level BE. Moreover, it has been revealed that transportation modes are associated with an individual’s life choices and the resulting quality of life (QoL). However, the effects of the BE on the...
Article
Full-text available
The novel coronavirus 2019 (COVID-19) outbreak has had wide-reaching and unprecedented impacts on the transport sector worldwide. At present, there is no globally agreed timeframe for when this pandemic will end. The current and near-future potential impacts must be addressed in a relatively comprehensive and seamless way. The present study propose...
Article
This virtual special issue (VSI) focuses on the importance of researching young people’s life choices and travel behaviors based on the life-oriented approach. Young people’s behaviors may be uniquely different from other age groups. A better understanding of such behaviors is essential for making transport policy decisions from long-term, interdis...
Article
The explosive advancements of sensing technologies, Artificial Intelligence (AI), and Internet of Things (IoT) have given rise to various smart technologies that brought profound changes in various aspects of urban life. Such changes may suggest a paradigm shift in the ways of experiencing and researching urbanism. However, we still know very littl...
Article
Aims Existing analysis methods about the relationships between the long‐term care (LTC) risks and determinants of the elderly often experience issues of independence, linearity and homogeneity. Such methodological issues are particularly problematic when the relationships are complicated, making the prioritization of LTC interventions to groups wit...
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Full-text available
With the objective of deriving useful insights into measures against traffic congestion at service areas (SAs) and parking areas (PAs) on expressways and ensuring efficient use of SAs/PAs, this study investigated the decisions on where a truck is parked (i.e., choice of an SA or a PA), how long it is parked (i.e., parking time), and their influenti...
Article
Life trajectory analysis has been shown a powerful approach to understand the interdependencies between key life events, critical incidents and long-term mobility decisions such as residential move, job change and change in vehicle possession, which in turn constitute the context of daily activity-travel decisions. Because people in multi-earner ho...
Article
Full-text available
This paper compares energy consumption (electricity, gasoline, and gas) by rural migrant workers and urban residents with a hukou (a China-specific household registration system) and influential factors (including quality-of-life [QOL]-related factors, built environment, and individual and household attributes) in China. A questionnaire survey was...
Article
This study analyzed the potentially dangerous driving behaviors of commercial truck drivers from both macro and micro perspectives. The analysis was based on digital tachograph data collected over an 11-month period and comprising 4373 trips made by 70 truck drivers. First, different types of truck drivers were identified using principal component...
Article
Full-text available
Traffic flow estimation (TFE) is an important task for intelligent transportation systems, especially for expressway system in travel demand management, road conditions monitor etc. Traffic flow is usually detected by fixed sensors, which is neither practical nor economically feasible to cover all expressway component links. Additionally, the exist...
Article
This study investigates how various smartphone applications are used, and how that use leads to changes in various aspects of urban life. Different types of applications and the scope of their impacts on urban life are captured based on a life-oriented approach. Data were collected via an online survey of 1000 residents living in different cities o...
Article
It is essential to better understand the opinions and behaviors of various stakeholders (e.g., persons in companies, customers, government, and local community) when taking effective traffic management and operation measures. Existing studies have examined the interactions between companies and customers in the context of distribution chains; howev...
Article
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Highly social activities like leisure and tourism are considered to have positive effects on the elderly’s mental health. Taking Japan as a case study, this research aims to clarify how leisure and tourism contribute to the elderly’s quality of life (QOL) in the domains of leisure and intimacy by comparing populated and depopulated areas. Such rese...
Article
This paper uses a generalized structural equation model (GSEM) to examine the relationships between a social network, the perception of social sustainability, and the future business intentions of small tourism enterprises, in the context of a developing country, Lao PDR. The data were derived from 177 such enterprises located in two destinations i...
Preprint
To analyze the influence of introducing the High-Speed Railway (HSR) system on business and non-business travel behavior, this study develops an integrated inter-city travel demand model to represent trip generations, destination choice, and travel mode choice behavior. The accessibility calculated from the RP/SP (Revealed Preference/Stated Prefere...
Article
Full-text available
Safety is crucial to ensure the sustainability of aviation growth. To better clarify the influences of human factors on aviation accident risks, this study developed a hybrid HFACS-BN model (HFACS: Human Factors Analysis and Classification System; BN: Bayesian Network). The authors designed and implemented a questionnaire survey based on the four-l...
Article
Use of smartphone apps to detect driving risks and/or provide warning information to drivers is a hot topic in traffic safety research. However, scientific evidence on the effectiveness of such apps to reduce dangerous driving is still limited. To provide additional insights, this study examines whether and how driving risks diagnoses and real-time...
Article
As an additional effort for exploring the unknowns about the ownership behavior of autonomous vehicles (AVs), we implemented an online stated preference (SP) survey in Japan and collected 1728 responses from car users across the whole country in 2016. The SP choice set included three types of AVs (conditional, high, and full automation) and a conve...
Preprint
It is one of hottest topics in Vietnam whether to construct a High Speed Rail (HSR) system or not in near future. To analyze the impacts of introducing the HSR on the intercity travel behavior, this research develops an integrated intercity demand forecasting model to represent trip generation and frequency, destination choice and travel mode choic...
Article
With the help of automated fare collection systems in the metro network, more and more smart card (SC) data has been widely accumulated, which includes abundant information (i.e., Big Data). However, its inability to record passengers’ transfer information and factors affecting passengers’ travel behaviors (e.g., socio-demographics) limits further...
Article
This paper develops a game-theoretical model of port competition for the intermodal network design and pricing strategy problem. In the model, port operators determine the dry port locations and pricing strategy to maximize profit considering the shipper’s route choice behavior. According to the characteristics of the Nash equilibrium solution for...
Book
Full-text available
[URL --- https://www.routledge.com/Routledge-Handbook-of-Transport-in-Asia/Zhang-Feng/p/book/9781138826014] [Abstract] Asian transportation systems and services, as well as their usage, are fraught with challenges. This handbook therefore seeks to examine the possible solutions to the problems faced by the region. It illustrates the history of tran...
Article
An increasing number of smartphone apps with driving safety diagnosis functions have been developed in the market; however, empirical evidence on whether these apps are actually effective in promoting road safety or not is limited. This study examines how the use of a global positioning system (GPS)-enabled smartphone app with driving safety relate...
Article
Full-text available
This study investigates Japanese drivers’ over-speeding violation behaviors on expressways captured by a GPS-enabled smart phone App, called Safety Supporter and designed by the authors, with functions of both second-by-second safety diagnosis and traffic warning information provision as well as advices about safer driving. The research purpose is...
Article
Full-text available
The well-being of young people—particularly aspects such as physical and mental health—has become an increasing concern for Japan’s government due, in part, to the aging and declining depopulation that Japan has been experiencing in recent years. Considering this, a survey of well-being and travel-to-school behavior was carried out in four high sch...
Article
Full-text available
For over forty years, most residents in rural areas of Japan have relied on private vehicles to meet their mobility needs. Today, however, the rapid ageing of the population, coupled with low birth rates and migration of young people to urban areas, is posing a variety of new transport challenges. Most notably, the proportion of drivers to non-driv...
Article
With the increasing impacts resulting from natural disasters, many people have been forced to move homes or jobs. The behavioral understanding of these movements is essential for decision makers. The main purposes of this paper are to investigate people's residence and job location change choice behavior and look into the behavioral differences bet...
Article
This study aimed to evaluate the impact of C/N ratio on the performance of a hybrid sponge-assisted aerobic moving bed-anaerobic granular membrane bioreactor (SAAMB-AnGMBR) in municipal wastewater treatment. The results showed that organic removal efficiencies were above 94% at all C/N conditions. Nutrient removal was over 91% at C/N ratio of 100/5...
Article
Liquefied Natural Gas (LNG) is a clean, efficient and economic energy, which is mainly transported by LNG carriers in the marine industry. Possible spilling of cryogenic LNG puts safety of crew in danger due to fire and explosion hazards. Taking into account various uncertainties, a modified fault tree model for LNG spill accident during LNG carrie...
Article
This special issue argues the importance of a paradigm shift from traditional approaches to the life-oriented approach for a better understanding of travel behavior and for better supporting cross-sectoral transport policymaking. The life-oriented approach focuses on the interdependencies between life choices, and for travel behavior analysis, it n...
Article
From a behavioral viewpoint, people choose where to live based on various factors, including their current situations, past experience, and plans for the future. Some aspects of residential preference might be constant over time, inherited from the initial stage of life, and other parts might be responses to residential biography or other biographi...
Article
Focusing on China, which has a special household registration system (called hukou), this study examines the likely effects of the China’s National New-type Urbanization Plan (2014–2020) on rural migrant workers’ intentions to reside permanently in cities and their future energy consumption preference. Questionnaire surveys were conducted in 2014 a...
Chapter
Tourism as an extension of people’s daily life is becoming prevalent in today’s society. However, understanding tourists is still a demanding and changeable task, and the preference structures and decision patterns of different tourists are complex. Research on tourism behavior can help address these issues. In recent decades, research on tourism b...
Chapter
Across the whole world, gender inequality issues are serious, mainly because of traditional thinking about the role specification within a household. Within the context of urban policy, relevant studies are very limited. This chapter argues that women’s labor participation should be further promoted for not only achieving gender equality, but also...
Chapter
This chapter first emphasizes the importance of understanding human behavior for urban policymaking and discusses the motivations of proposing the core approach in this book, i.e., the life-oriented approach. Second, it describes the life-oriented approach, which argues that interdependencies are essential to understand various life choices. Third,...
Chapter
This chapter describes risky behaviors in daily life, especially focusing on young people. Driving while intoxicated, speeding, and illegal drug use are examples of risky behaviors, which often compromise health, quality of life, or life itself. People perform some risky behaviors consciously while they do others unconsciously. This chapter first d...
Chapter
This book has attempted to provide a general picture about the life-oriented approach by focusing on major life choices. In reality, there are so many types of life choices and it is therefore impossible to cover all of them in a single book. Here, first, this chapter makes brief discussions on research issues related to several life choices exclud...
Chapter
Health has been of growing interest for professionals in a variety of disciplines, including engineers and urban planners among many others. Urban and transport policies may be interlinked with health at many levels, directly or indirectly, because connections between life choices and health may be bidirectional. A healthy life means a balanced con...
Chapter
This chapter deals with not only household car ownership and usage, but also ownership and usage of in-home electric and electronic appliances from the perspective of energy consumption. Household energy consumption is an outcome of a series of life choices including end-use ownership, end-use efficiency, end-use usage, time use, expenditure alloca...
Chapter
This chapter presents empirical evidence of behavioral interdependencies across more than 80 life choice variables, based on data collected from a cross-sectional survey, a panel survey, and a life history survey in Japan, respectively. Similar analyses are further conducted with respect to more than 20 indicators of life satisfaction and happiness...
Chapter
This chapter focuses on car dependence in people’s life. The authors first describe a new phenomenon about the decline in young people’s car ownership and usage by providing additional facts and insights based on literature review and a case study in Japan. Especially, the case study in Japan uses data from a longitudinal national household expendi...
Chapter
This chapter first explores migration-related urban issues and then illustrates migration dynamics. It further points out the limitations of existing migration theories. To overcome the shortcomings of existing theories, this chapter presents a new analysis framework for migration, where multiple life choices, including migration, are simultaneousl...