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- 저자 : Donhyung Kim (검색결과 1 건)
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Donhyung Kim,Jooil Lee,최 사이먼 서울시립대학교 도시과학연구원 2015 도시과학국제저널 Vol.19 No.2
Planning approaches towards the promotion of public transit are widely discussed among planners and policy-makers to reduce the greenhouse gas (GHG) emissions from automobiles and light-duty trucks. However, one of significant side effects created by these approaches is decreased mobility. Since mobility is the critical foundation for the economic development of cities, it is important to balance the level of regional mobility and GHG reduction achieved by a mode share scheme. Using the Cobb–Douglas functions, this paper attempts to identify the best mode share scheme for an urban passenger transportation system to achieve the maximum reduction of GHG emissions, while maintaining the current carrying capacity of the public transit system and regional mobility in the Los Angeles Metropolitan Area (LAMA) and the Seoul Metropolitan Area (SMA). This paper identifies that both metropolitan areas can reduce CO2 emissions by the best public transit mode share. However, it suggests that the CO2 reductions achieved by the mode share adjustment of the areas are noticeably different, indicating that LAMA and SMA can reduce 3.5% and 20.6% of their current CO2 emissions through the adjustment of mode share, respectively. This paper concludes that a sprawled, automobile-oriented city like Los Angeles can achieve limited CO2 emission reductions by adjusting public transit mode share, compared to Seoul, which is a dense, compact city.
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