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Railway Expansion Reduces Carbon Emissions by Shifting Road Traffic to Railways

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  • YOO Sunbin
  • KUMAGAI Junya
  • MATSUSHIMA Hiroshi
  • Madhu KHANNA
  • MANAGI Shunsuke

Abstract

Transportation is a major contributor to global carbon emissions due to its reliance on fossil fuels, with railways often cited as a promising solution for emission reduction. However, empirical evidence of railways’ effectiveness in reducing carbon emissions has been limited. Our study reveals that the expansion of Japan’s railway net- work over the past 30 years has led to a significant reduction in carbon emissions, ranging from 97.44 to 110.73 million metric tons. This translates to an annual reduction of up to 1.697% of Japan’s transportation sector emissions in 2019, a finding that demonstrates the broader environmental implications of systemic railway development. In contrast, station openings have led to a slight overall increase in emissions, contributing an additional 2.5 million metric tons over the same period. These findings emphasize the greater impact of comprehensive network expansions in reducing carbon emissions compared to localized station openings and underscore the importance of strategic railway expansion as a key measure for mitigating carbon emissions and advancing sustainable urban development.

Suggested Citation

  • YOO Sunbin & KUMAGAI Junya & MATSUSHIMA Hiroshi & Madhu KHANNA & MANAGI Shunsuke, 2025. "Railway Expansion Reduces Carbon Emissions by Shifting Road Traffic to Railways," Discussion papers 25006, Research Institute of Economy, Trade and Industry (RIETI).
    • Handle: RePEc:eti:dpaper:25006
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