{"title":"Potential for reducing CO2 emissions from passenger cars in Japan by 2030 to achieve carbon neutrality","authors":"Dyah Ika Rinawati , Alexander Ryota Keeley , Shutaro Takeda , Norihiro Itsubo , Shunsuke Managi","doi":"10.1016/j.iatssr.2023.02.004","DOIUrl":"10.1016/j.iatssr.2023.02.004","url":null,"abstract":"<div><p>For Japan to achieve its targets for carbon neutrality and reduction of carbon dioxide (CO<sub>2</sub>) emissions, decarbonization of road transport is essential. Japan regards next-generation vehicles, including hybrid electric vehicles (HEVs), plug-in hybrid electric vehicles (PHEVs), battery electric vehicles (BEVs), and fuel cell vehicles, as a key means of reducing carbon emissions from road transport. Four scenarios were proposed to predict the potential carbon emissions reduction of passenger car use in 2030: baseline, business-as-usual, government's target-based, and aggressive scenarios. Economic input–output life cycle assessment was used to evaluate potential CO<sub>2</sub> emissions, acidification, eutrophication, human toxicity, and photochemical oxidation associated with passenger cars. In this study, all environmental impacts were calculated using the multi-regional environmentally extended supply and use/input–output database by applying the CML 2001 impact assessment method. The findings indicate that PHEVs have the lowest CO<sub>2</sub> emissions per km traveled, followed by HEVs and BEVs. The prediction for carbon emissions from passenger cars shows that adopting electrified vehicles, such as HEVs, PHEVs, and BEVs could help decarbonize the passenger car sector. The population of vehicles, vehicle manufacturing, well-to-wheel cycle of fuel, and fuel economy will significantly contribute to CO<sub>2</sub> emissions. Finally, this study recommends policies to steer Japan into achieving its goal of carbon neutrality.</p></div>","PeriodicalId":47059,"journal":{"name":"IATSS Research","volume":null,"pages":null},"PeriodicalIF":3.2,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44690667","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Association between daytime sleepiness and motor vehicle accidents among Japanese male taxi drivers","authors":"Eisuke Takeyama , Kiyohide Tomooka , Hiroo Wada , Setsuko Sato , Noriko Sakiyama , Ryutaro Shirahama , Takeshi Tanigawa","doi":"10.1016/j.iatssr.2023.05.002","DOIUrl":"10.1016/j.iatssr.2023.05.002","url":null,"abstract":"<div><p>Although the Epworth Sleepiness Scale (ESS) is a scoring system commonly used to assess daytime sleepiness (DS), the association between ESS and motor vehicle accidents (MVAs) remains unclear. Therefore, we conducted a cross-sectional study to examine the association between an increase in the Japanese version of the ESS (JESS) scores and MVAs among Japanese male taxi drivers. The study participants were 1384 Japanese male taxi drivers. DS was assessed using the JESS, and the total JESS scores were categorized into quartile groups. MVA experience during the past five years was assessed using a self-administered questionnaire. A multivariable generalized linear model was used to examine the association between JESS and MVAs after adjusting for age, body mass index, smoking status, snoring, sleep duration, driving experience, driving distance per year, hypertension, and diabetes mellitus.</p><p>The proportion of MVAs was 59.7%. The multivariable-adjusted prevalence ratio (95% confidence interval) of MVAs for the highest quartile of the JESS score was 1.16 (1.04–1.29) compared to the lowest quartile, and for continuous JESS score was 1.01 (1.002–1.02). Thus, we found a significant association between an increase in JESS scores and MVAs among Japanese male taxi drivers after adjusting for potential confounders. Stratification by sleep duration and snoring status revealed a significant association among long sleepers and non-snorers. Our findings suggest that ESS evaluation methods be reconsidered in relation to MVA among commercial drivers.</p></div>","PeriodicalId":47059,"journal":{"name":"IATSS Research","volume":null,"pages":null},"PeriodicalIF":3.2,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48246323","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
IATSS ResearchPub Date : 2023-07-01DOI: 10.1016/j.iatssr.2023.03.004
Masayoshi Tanishita , Yuta Sekiguchi , Daisuke Sunaga
{"title":"Impact analysis of road infrastructure and traffic control on severity of pedestrian–vehicle crashes at intersections and non-intersections using bias-reduced logistic regression","authors":"Masayoshi Tanishita , Yuta Sekiguchi , Daisuke Sunaga","doi":"10.1016/j.iatssr.2023.03.004","DOIUrl":"10.1016/j.iatssr.2023.03.004","url":null,"abstract":"<div><p>Pedestrian safety is essential to realize a walkable city. This study analyzed the impact of road infrastructure and traffic control on severity of pedestrian–vehicle crashes at intersections and non-intersections. We applied a bias-reduced logistic regression analysis using 86,406 pedestrian–vehicle crashes data including 2636 fatal accidents in Japan. The results of the study indicate that medians increased the severity of crashes at intersections; on the other hand, they decreased the severity at non-intersections. In addition, flashing traffic signals increase the severity while stop signs decrease the severity at intersections.</p></div>","PeriodicalId":47059,"journal":{"name":"IATSS Research","volume":null,"pages":null},"PeriodicalIF":3.2,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45818755","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Estimation of passenger car CO2 emissions by population density class based on Japanese vehicle inspection certificate data","authors":"Keisuke Matsuhashi, Toshinori Ariga, Masahiro Ishikawa","doi":"10.1016/j.iatssr.2023.02.002","DOIUrl":"10.1016/j.iatssr.2023.02.002","url":null,"abstract":"<div><p>Estimates of passenger car CO<sub>2</sub> emissions that reflect regional characteristics are useful for predicting the effects of electrification, modal shifts in transport, and urban compactness. To date, differences in emissions have often been estimated based on the regional differences in the number of vehicles owned. Regional differences in mileage were estimated from the counts of the Origin and Destination Surveys in the Road Traffic Census. In this study, by utilizing the mileage data from the vehicle inspection certificate data, it was possible to reflect the differences in mileage per vehicle in detailed regional terms. The higher the population density, the smaller was the mileage per vehicle. Based on this, we calculated the CO<sub>2</sub> emissions from passenger cars by municipality nationwide and estimated the CO<sub>2</sub> emissions and population share by grid population density. In areas of 3000–10,000 persons/km<sup>2</sup>, which accounts for approximately 40% of Japan's population, emissions per person approximated the national average. However, in areas with 1000–3000 persons/km<sup>2</sup> (approximately 20% of the population), emissions per person were approximately 30% higher; while with 100–1000 persons/km<sup>2</sup> (approximately 1.5% of the population), they were approximately 70% higher; and with 10,000 persons/km<sup>2</sup> (approximately 25% of the population), they were approximately 70% lower. A map was produced for use when considering the cities and regions suitable for a decarbonized society as well as policies such as electrification, modal shift, and coordination of urban centers.</p></div>","PeriodicalId":47059,"journal":{"name":"IATSS Research","volume":null,"pages":null},"PeriodicalIF":3.2,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49516286","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
IATSS ResearchPub Date : 2023-07-01DOI: 10.1016/j.iatssr.2023.03.002
Ahmed Hossain , Xiaoduan Sun , Raju Thapa , Md. Mahmud Hossain , Subasish Das
{"title":"Exploring association of contributing factors to pedestrian fatal and severe injury crashes under dark-no-streetlight condition","authors":"Ahmed Hossain , Xiaoduan Sun , Raju Thapa , Md. Mahmud Hossain , Subasish Das","doi":"10.1016/j.iatssr.2023.03.002","DOIUrl":"10.1016/j.iatssr.2023.03.002","url":null,"abstract":"<div><p>The pedestrian crash pattern in the dark-no-streetlight condition is a noteworthy ongoing traffic safety concern. The persistently high percentage of pedestrian fatalities at night in the U.S., as well as in the state of Louisiana, necessitates new research to supplement existing studies. This study utilized 10 years (2010–2019) of pedestrian fatal and severe injury crashes in Louisiana that occurred in the dark without streetlights to identify the associated crash patterns. The methodology is based on Multiple Correspondence Analysis (MCA), an exploratory approach used to discover the association of multiple categorical variables from a crash dataset. The findings suggest that driver characteristics (age, gender, and physical condition), pedestrian action, pedestrian alcohol impairment, and physical settings (posted speed limit, location, and roadway type) have a substantial impact on pedestrian collisions at night without streetlights. Moreover, the obtained combination clouds of MCA reveal associations such as elderly pedestrian (>64 years) alcohol impairment resulting in fatalities, crashes in an open country location with a high posted speed limit, crashes involving pedestrians in dark clothing on high-speed (50–55 mph) roadways, alcohol-impaired driver involvement in crashes on two-way roads without physical separation, severe injury crashes at intersections, male pedestrian crashes on midblock locations during weekends, and young (15–24 years) female driver's involvement in crashes while pedestrians were walking against the traffic. Based on the findings, this research also suggests safety recommendations that can assist highway safety practitioners in determining appropriate countermeasures to reduce pedestrian crashes in the dark-no-streetlight condition.</p></div>","PeriodicalId":47059,"journal":{"name":"IATSS Research","volume":null,"pages":null},"PeriodicalIF":3.2,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43462112","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
IATSS ResearchPub Date : 2023-07-01DOI: 10.1016/j.iatssr.2023.03.005
Mustapha Amoadu, Edward Wilson Ansah, Jacob Owusu Sarfo
{"title":"Psychosocial work factors, road traffic accidents and risky driving behaviours in low-and middle-income countries: A scoping review","authors":"Mustapha Amoadu, Edward Wilson Ansah, Jacob Owusu Sarfo","doi":"10.1016/j.iatssr.2023.03.005","DOIUrl":"10.1016/j.iatssr.2023.03.005","url":null,"abstract":"<div><h3>Background</h3><p>Low-and middle-income countries (LMICs) have the greatest road traffic crashes burden, with about 93% of global fatalities occurring in such countries. This situation is partly due to the high level of psychosocial work hazards to which professional drivers are exposed. Therefore, this review aims to map evidence on the psychosocial work factors that influence risky driving behaviours and road traffic crashes in LMICs.</p></div><div><h3>Methods</h3><p>Four main databases (PubMed, Central, Dimensions and JSTOR), in addition to google and google scholar, were searched for records. In all, 6537 records were retrieved and finally, through experts' consultations and a vigorous screening process, 54 studies were included in this review. Included studies sampled 30,272 drivers from 23 LMICs.</p></div><div><h3>Results</h3><p>The reviewed studies found that job strain, efforts-reward imbalance, payments based on performance, lack of social support from supervisors and co-workers, lack of job control from job autonomy and skill discretion, long driving hours, lonely driving, irregular job schedules like shift work and overtime, work-family conflicts, job insecurity and lack of safety motivation are the main psychosocial work factors influencing risky driving behaviours and road traffic crashes among professional drivers in LMICs.</p></div><div><h3>Conclusion</h3><p>Though more quality studies are needed to explore the psychosocial work factors of professional drivers in LMICs, there is a need for occupational health and safety policies for improved working conditions like reduction in workload and long driving hours, access to healthcare and improved psychosocial safety climate.</p></div>","PeriodicalId":47059,"journal":{"name":"IATSS Research","volume":null,"pages":null},"PeriodicalIF":3.2,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44708995","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
IATSS ResearchPub Date : 2023-07-01DOI: 10.1016/j.iatssr.2023.01.001
Masanobu Kii , Ryota Isikawa , Yusuke Kometani
{"title":"Toward a carbon neutral urban transportation system in Japan","authors":"Masanobu Kii , Ryota Isikawa , Yusuke Kometani","doi":"10.1016/j.iatssr.2023.01.001","DOIUrl":"10.1016/j.iatssr.2023.01.001","url":null,"abstract":"<div><p>At COP26, in November 2021, more than 150 countries declared their commitment to carbon neutrality. A decarbonized society has become a common goal in many countries. The Japanese government has declared that it aims to achieve a decarbonized society by 2050. Urban transportation also requires significant reductions in CO<sub>2</sub> emissions, but there is a risk that carbon neutrality cannot be achieved solely through decarbonizing technologies for transportation vehicles and energy sources; therefore, cooperation with cities and society is necessary. This paper discusses the possibility of achieving carbon neutrality in urban transportation in Japan by reviewing 1) the status of vehicle and fuel decarbonization technologies, 2) the possibility of reducing CO<sub>2</sub> emissions through land use policies, and 3) the effects of information communication technologies on transportation behavior based on the literature.</p></div>","PeriodicalId":47059,"journal":{"name":"IATSS Research","volume":null,"pages":null},"PeriodicalIF":3.2,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44476154","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
IATSS ResearchPub Date : 2023-07-01DOI: 10.1016/j.iatssr.2023.02.005
Keigo Akimoto
{"title":"Assessment of road transportation measures for global net-zero emissions considering comprehensive energy systems","authors":"Keigo Akimoto","doi":"10.1016/j.iatssr.2023.02.005","DOIUrl":"10.1016/j.iatssr.2023.02.005","url":null,"abstract":"<div><p>Many countries are seeking to achieve net-zero carbon dioxide emissions by 2050. Electrification is a key measure for achieving this goal in all sectors, including the transport sector. Meanwhile, there are several emission reduction options in the road transport sector for achieving net-zero emissions when entire energy systems are considered. It is important to consider entire energy systems not only in the transport sector, but also in the energy supply sectors, including emission offset measures of carbon dioxide removal (CDR) under several conditions of energy supply and transport constraints. This article presents the assessment of scenarios estimated by a global energy systems model—the DNE21+ model—that describes detailed technologies considering differences among regions/countries, followed by the comparative evaluation of the Intergovernmental Panel on Climate Change (IPCC), International Energy Agency, and BP scenarios. Hybrid electric vehicles and plug-in hybrid electric vehicles could also be cost-effective, even under the net-zero world, thanks to the emission offset of CDR under the scenarios with the costs and potentials of CDR which are consistent with the IPCC scenarios and broadly reviewed future costs of direct air capture (DAC) which is one of the CDR.</p></div>","PeriodicalId":47059,"journal":{"name":"IATSS Research","volume":null,"pages":null},"PeriodicalIF":3.2,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47046253","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
IATSS ResearchPub Date : 2023-07-01DOI: 10.1016/j.iatssr.2023.04.001
Jinho Lee , Daiki Shiotsuka , Geonkyu Bang , Yuki Endo , Toshiaki Nishimori , Kenta Nakao , Shunsuke Kamijo
{"title":"Day-to-night image translation via transfer learning to keep semantic information for driving simulator","authors":"Jinho Lee , Daiki Shiotsuka , Geonkyu Bang , Yuki Endo , Toshiaki Nishimori , Kenta Nakao , Shunsuke Kamijo","doi":"10.1016/j.iatssr.2023.04.001","DOIUrl":"10.1016/j.iatssr.2023.04.001","url":null,"abstract":"<div><p>Recently, autonomous driving technologies require robust perception performance through deep learning with huge data and annotations. To guarantee performance, perception accuracy should be robust even in nighttime. However, lots of perception technologies perform poorly with nighttime data. It is because most current datasets with annotation are composed of daytime scenes and there are few datasets for adverse conditions especially in nighttime. A massive cost of human resources and time is required to collect large amounts of data with annotation. To deal with the upper problem, many image translation methods by Generative Adversarial Networks (GANs) are proposed to generate realistic synthetic data. However, there is a significant limitation in traditional image translation methods. It is that generated images are inconsistent on semantic information to their original images. To handle this limitation, we propose an image translation with applying transfer learning to keep semantic information. There are two steps to train the proposed network. First, the segmentation network is trained on the source domain, i.e., daytime. After that, we transfer the pretrained segmentation weights to the encoder of generator and retrain only the decoder of GANs for day-to-night image translation. Experimental results show that the proposed method can generate more semantic consistent nighttime images than traditional studies.</p></div>","PeriodicalId":47059,"journal":{"name":"IATSS Research","volume":null,"pages":null},"PeriodicalIF":3.2,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45199255","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
IATSS ResearchPub Date : 2023-07-01DOI: 10.1016/j.iatssr.2023.04.002
Masahisa Sato , Yuto Kitamura
{"title":"Current status of climate change education and suggestions for its integrative development in Japan","authors":"Masahisa Sato , Yuto Kitamura","doi":"10.1016/j.iatssr.2023.04.002","DOIUrl":"https://doi.org/10.1016/j.iatssr.2023.04.002","url":null,"abstract":"<div><p>This study presents proposals for the expansion, improvement, and integrative development of Climate Change Education (CCE) in Japan. It provides an overview of CCE-related initiatives by the international community. In particular, we examine (1) how CCE was positioned within the United Nations Decade of Education for Sustainable Development (DESD) 2005–2014 and international DESD programs; (2) how education, training, and awareness raising are positioned within policy measures concerning climate change adaptation and mitigation, as represented by those adopted by the Conference of the Parties (COP) to the United Nations Framework Convention on Climate Change (UNFCCC); and (3) the significance of CCE, which covers the two aspects building “the world we want (UNDG, 2013), and responding to a “risk society (Beck, 1986).” Furthermore, it reviews international trends in research on CCE to understand the current status of CCE research in Japan.</p><p>For the case analysis, the study discusses CCE, using mobility (transportation) as an example area, with an eye to the future expansion and improvement of CCE in Japan, while referring to three integrative problem-solving models. We highlight the importance of the construction of a social ecosystem to the development of more widespread and effective CCE. Encouraging people to adopt responsible behavior is also essential and can be achieved by informing them of the clearly defined different dimensions of CCE. They are individual actors, systems, organizational structures, the public sphere, and daily life, and are based upon the integrative problem-solving models mentioned in this study.</p></div>","PeriodicalId":47059,"journal":{"name":"IATSS Research","volume":null,"pages":null},"PeriodicalIF":3.2,"publicationDate":"2023-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49722716","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}