Field investigation and parametric study of greenhouse gas emissions from railway plain-line renewals |
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| Institution: | 1. School of Computing, Engineering & Mathematics, Western Sydney University, Kingswood, NSW, Australia;2. Birmingham Centre for Railway Research and Education, School of Civil Engineering, The University of Birmingham, Birmingham, B152TT, UK;1. The University of Birmingham, 52 Pritchatts Road, Birmingham, B152TT, UK;2. Railway Technical Research Institute, Hikari-cho, Kokubunji, Tokyo, 185-8540, Japan;3. Universiy of Wollongogn, Northfield Ave., Wollongong, NSW, 2502, Australia;1. Key Laboratory of High-Speed Railway Engineering, Ministry of Education, Southwest Jiaotong University, Chengdu 610031, China;2. School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China;3. Department of Civil and Environmental Engineering, University of Maryland, College Park, MD, USA;4. China Railway Eryuan Engineering Group CO., Ltd, Chengdu 610031, China;5. China Railway Siyuan Survey and Design Group CO., Ltd, Wuhan 430063, China;1. School of Economics and Business, Martin-Luther-University, Gr. Steinstr. 73, 06108 Halle, Germany;2. Faculty of Business, Economics and Social Sciences, Christian-Albrechts-University Kiel, Olshausenstr. 40, 24098 Kiel, Germany;1. Laboratory for Track Engineering and Operations for Future Uncertainties (TOFU Lab), Department of Civil Engineering, School of Engineering, The University of Birmingham, Edgbaston, B15 2TT, Birmingham, United Kingdom;2. Railway Engineering Department, China Communications Construction Company, Ltd. (CCCC)''s First Harbor Engineering Co. Ltd., Building No.8, Shipping Services Center, Yuejin Road, Tianjin Port Bonded Zone, Tianjin, PR China |
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| Abstract: | Railway transportation is becoming increasingly important in many parts of the world for mass transport of passengers and freight. This study was prompted by the industry’s need to systemically estimate greenhouse gas emissions from railway construction and maintenance activities. In this paper, the emphasis is placed on plain-line railway maintenance and renewal projects. The objective of this study was to reduce the uncertainties and assumptions of previous studies based on ballasted track maintenance and renewal projects. A field-based data collection was carried out on plain-line ballasted track renewals. The results reveal that the emissions from the materials contribute more than nine times the CO2-e emissions than the machines used in the renewal projects. The results show that extending the lifespan of rail infrastructure assets through maintenance is beneficial in terms of reducing CO2-e emissions. Analysis was then carried out using the field data. Then the results were compared to two ballastless track alternatives. The results show that CO2-e emissions per metre from ballasted track were the least overall, however, the maintenance CO2-e emissions are greater than those of ballastless tracks over the infrastructure lifespan, with ballasted track maintenance emitting more CO2-e emissions at the 30 and 60 year intervals and the end of life when compared to the ballastless track types. The outcome of the study can provide decision makers, construction schedulers, environmental planners and project planners with reasonably accurate GHG emission estimates that can be used to plan, forecast and reduce emissions for plain-line renewal projects. |
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| Keywords: | Railway construction and maintenance Track beds Greenhouse gas emissions Random Uncertainty Ballasted and ballastless tracks Life cycle |
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