气候变化领域集成服务门户(CCPortal): Embodied emissions in rail infrastructure: A critical literature review

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DOI	10.1088/1748-9326/ab442f
	Embodied emissions in rail infrastructure: A critical literature review
	Olugbenga O.; Kalyviotis N.; Saxe S.
发表日期	2019
ISSN	17489318
卷号	14 期号:12
英文摘要	This paper investigates the state of knowledge in quantifying the embodied greenhouse gas (GHG) emissions in rail infrastructure and develops a sketch model for estimating the GHG impact of rail infrastructure based on the literature. A literature review identified 22 publications, containing 57 case studies, at least touching on the embodied GHG for different types of rail infrastructure. The cases studies include high speed rail, intercity rail, light rail, commuter rail, heavy rail, freight, and metro rail. The paper examines the GHG impact per kilometre of rail infrastructure reported across the case studies and compares the boundaries, functional units, methods, and data used. Most studies employed process-based LCA for an attributional analysis. The embodied emissions associated with the case studies range from 0.5 to 12 700 tCO2 km-1; much of the variation is dependent on the proportion of the rail line at-grade, elevated, or in a tunnel. However, large ranges in GHG per kilometre remain after controlling for elevated and tunneled distance. Comparing the embodied emissions across the rail types was challenging, due to the large variations in system boundaries, study goals, and inventory methods adopted in the publications. This review highlights the need for standardization across the reporting of embodied GHG for rail infrastructure to better facilitate hot spot detection, engineering design and GHG policy decision making. The statistical model finds that overall ∼941(±168) tCO2e are embodied per kilometre of rail at-grade, and tunneling has 27 (±5) times more embodied GHG per kilometre than at-grade construction. The statistical model is based on the findings of published literature and does not explicitly consider function, geometry, specifications, emphasis on whole lifecycle, legislative constraints, socio-economic factors, or the physical and environmental conditions of the construction site. © 2019 The Author(s). Published by IOP Publishing Ltd.
语种	英语
scopus关键词	Decision making; Gas emissions; Greenhouse gases; Life cycle; Light rail transit; Railroad transportation; Construction sites; Embodied emissions; Environmental conditions; Hot spot detection; Literature reviews; Rail infrastructure; Socio-economic factor; Statistical modeling; Railroad tunnels; decision analysis; emission; environmental conditions; greenhouse gas; infrastructure; legislation; life cycle analysis; literature review; railway; standardization; tunneling
来源期刊	Environmental Research Letters
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/154335
作者单位	Department of Civil and Mineral Engineering, University of Toronto, Toronto, Canada
推荐引用方式 GB/T 7714	Olugbenga O.,Kalyviotis N.,Saxe S.. Embodied emissions in rail infrastructure: A critical literature review[J],2019,14(12).
APA	Olugbenga O.,Kalyviotis N.,&Saxe S..(2019).Embodied emissions in rail infrastructure: A critical literature review.Environmental Research Letters,14(12).
MLA	Olugbenga O.,et al."Embodied emissions in rail infrastructure: A critical literature review".Environmental Research Letters 14.12(2019).