Chronological Transition of Relationship between Intracity Lifecycle Transport Energy Efficiency and Population Density
Interests in evaluating lifecycle energy use in urban transport have been growing as a research topic. Various studies have evaluated the relationship between the intracity transport energy use and population density and commonly identified its negative correlation. However, a diachronic transition...
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| Format: | Article |
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MDPI AG
2020-04-01
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| Series: | Energies |
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| Online Access: | https://www.mdpi.com/1996-1073/13/8/2094 |
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| author | Shoki Kosai Muku Yuasa Eiji Yamasue |
| author_facet | Shoki Kosai Muku Yuasa Eiji Yamasue |
| author_sort | Shoki Kosai |
| collection | DOAJ |
| description | Interests in evaluating lifecycle energy use in urban transport have been growing as a research topic. Various studies have evaluated the relationship between the intracity transport energy use and population density and commonly identified its negative correlation. However, a diachronic transition in an individual city has yet to be fully analyzed. As such, this study employed transport energy intensity widely used for evaluating transport energy efficiency and obtained the transport energy intensity for each transportation means including walk, bicycle, automobile (conventional vehicles, electric vehicles, hybrid vehicles, and fuel cell vehicles), bus and electric train by considering the lifecycle energy consumption. Then, the intracity lifecycle transport energy intensity of 38 cities in Japan in 1987–2015 was computed, assuming that the cause of diachronic transition of intracity transport energy efficiency is the modal shifting and electricity mix change. As a result, the greater level of population density was associated with the lower intracity transport energy intensity in Japanese cities. The negative slope of its regression line increased over time since the intracity lifecycle transport energy intensity in cities with low population density continuously increased without any significant change of population density. Finally, this study discussed the strategic implications particularly in regional areas to improve the intracity lifecycle transport energy efficiency. |
| first_indexed | 2024-03-10T20:18:36Z |
| format | Article |
| id | doaj.art-af695f77bcc44df3932164b426ec0945 |
| institution | Directory Open Access Journal |
| issn | 1996-1073 |
| language | English |
| last_indexed | 2024-03-10T20:18:36Z |
| publishDate | 2020-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Energies |
| spelling | doaj.art-af695f77bcc44df3932164b426ec09452023-11-19T22:22:04ZengMDPI AGEnergies1996-10732020-04-01138209410.3390/en13082094Chronological Transition of Relationship between Intracity Lifecycle Transport Energy Efficiency and Population DensityShoki Kosai0Muku Yuasa1Eiji Yamasue2Graduate School of Energy Science, Kyoto University, Kyoto 606-8501, JapanDepartment of Mechanical Engineering, College of Science and Engineering, Ritsumeikan University, Shiga 525-8577, JapanDepartment of Mechanical Engineering, College of Science and Engineering, Ritsumeikan University, Shiga 525-8577, JapanInterests in evaluating lifecycle energy use in urban transport have been growing as a research topic. Various studies have evaluated the relationship between the intracity transport energy use and population density and commonly identified its negative correlation. However, a diachronic transition in an individual city has yet to be fully analyzed. As such, this study employed transport energy intensity widely used for evaluating transport energy efficiency and obtained the transport energy intensity for each transportation means including walk, bicycle, automobile (conventional vehicles, electric vehicles, hybrid vehicles, and fuel cell vehicles), bus and electric train by considering the lifecycle energy consumption. Then, the intracity lifecycle transport energy intensity of 38 cities in Japan in 1987–2015 was computed, assuming that the cause of diachronic transition of intracity transport energy efficiency is the modal shifting and electricity mix change. As a result, the greater level of population density was associated with the lower intracity transport energy intensity in Japanese cities. The negative slope of its regression line increased over time since the intracity lifecycle transport energy intensity in cities with low population density continuously increased without any significant change of population density. Finally, this study discussed the strategic implications particularly in regional areas to improve the intracity lifecycle transport energy efficiency.https://www.mdpi.com/1996-1073/13/8/2094metropolitan areain-citytransport energy intensitywell to wheelmaterial structure |
| spellingShingle | Shoki Kosai Muku Yuasa Eiji Yamasue Chronological Transition of Relationship between Intracity Lifecycle Transport Energy Efficiency and Population Density Energies metropolitan area in-city transport energy intensity well to wheel material structure |
| title | Chronological Transition of Relationship between Intracity Lifecycle Transport Energy Efficiency and Population Density |
| title_full | Chronological Transition of Relationship between Intracity Lifecycle Transport Energy Efficiency and Population Density |
| title_fullStr | Chronological Transition of Relationship between Intracity Lifecycle Transport Energy Efficiency and Population Density |
| title_full_unstemmed | Chronological Transition of Relationship between Intracity Lifecycle Transport Energy Efficiency and Population Density |
| title_short | Chronological Transition of Relationship between Intracity Lifecycle Transport Energy Efficiency and Population Density |
| title_sort | chronological transition of relationship between intracity lifecycle transport energy efficiency and population density |
| topic | metropolitan area in-city transport energy intensity well to wheel material structure |
| url | https://www.mdpi.com/1996-1073/13/8/2094 |
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