Global urban subway development, construction material stocks, and embodied carbon emissions

Mao, Ruichang; Bao, Yi; Duan, Huabo; Liu, Gang

doi:10.1057/s41599-021-00757-2

Cited by 29 publications

(23 citation statements)

References 51 publications

(56 reference statements)

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“…This mass had dramatically increased by 28 times and added up to 3.65 Gt in 2020 (mean value, with a minimum of 3.60 Gt and a maximum of 3.71Gt) (Fig. 1b), larger than current global subway stocks (2.5 Gt) 29 1b). In terms of bridge stocks, the majority amounts are located in box girder (39%), following the base platform (22%), pier (21%), and pile foundation (18%).…”

Section: Introductionmentioning

confidence: 94%

Development patterns, material metabolism, and life-cycle greenhouse gas emissions of high-speed railway in China

Mao

Wu²,

Chen³

et al. 2023

Preprint

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China built the longest high-speed rail (HSR) network by consuming massive construction materials. However, the characterization of HSR material metabolism and associated emissions at national level remains less explored. Here, we revealed the material metabolism and life-cycle GHG emissions from 2008 to 2035 in China’s HSR network. We show that material stocks temporally amount from 0.6 gigatons in 2010 to 3.7 gigatons in 2020, dominated by aggregate and cement rather than steel. Spatially, material distributions across provinces are becoming balanced. Growing HSR speed increased the construction material demands and flows, but technological advances significantly offset these increasing consumptions, especially for developing bridge-girder spans and ballasted tracks. Our results demonstrate the life cycle emissions of HSR, with 1,008 megatons of carbon replacement value and annually 31 megatons of operational GHG emissions in 2020, and highlight the environmental benefits of HSR to inform green transportation transitions.

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Section: Introductionmentioning

confidence: 94%

Development patterns, material metabolism, and life-cycle greenhouse gas emissions of high-speed railway in China

Mao

Wu²,

Chen³

et al. 2023

Preprint

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“…The bridge is 1.8 km in length, with a planned investment of 3.61 billion RMB and a planned construction period of three years. The selected case studies are extremely useful UTIPs, providing connectivity and mobility for a modern society, which is critical to ensure human development and to respond to sustainability challenges (Mao et al, 2021;Thacker et al, 2019;Wey, 2019). These two types of projects are different in nature and construction technology.…”

Section: Case Selectionmentioning

confidence: 99%

Ability or morality? Exploring the multiple dimensions of social trust on public acceptance of urban transport infrastructure projects

Wang

Zuo

et al. 2023

IJMPB

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PurposeThe public's trust in the authorities has a great impact on people's perception and cognition on development of different types of urban transport infrastructure projects (UTIPs). Given the importance of public acceptance for the efficient construction and operation of UTIPs, this study aims at investigating the personal and environmental factors that influence public acceptance behavior from the perspective of stakeholder management.Design/methodology/approachBased on social cognitive theory (SCT), this study explores the multiple dimensions of social trust on public acceptance in the development of UTIPs by a comparative case study. Two types of UTIPs, a metro railway and a bridge in the Wuhan City, China, were selected as cases, with a questionnaire distributed among the public to collect their sense of trust towards the development of these projects. The data were analyzed through structural equation modeling (SEM).FindingsThis study reveals that social trust positively influences public acceptance, directly or indirectly through perceived benefit and -risks and self-efficacy. However, the emphasis on social trust about competence and integrity of the authorities varies with the types of projects. Self-efficacy worked as the “mirror of trust” reflecting people's attitude towards social trust in the authorities on their ability and morality.Originality/valueThe value of the paper lies in discussing social trust from multiple dimensions in the field of urban infrastructures, which provides new insights into specific mechanisms for shaping public acceptance in project management towards the development of UTIPs.

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“…Second, due to the lack of basic subject accumulation and technological breakthroughs, it is difficult to meet both the urgent requirements of global sustainable development and the needs of scientific decision-making. In recent years, large-scale urbanization, carbon emissions, and sustainable development relationships have combined into a newly emerging and multidisciplinary field of research (Behera & Dash, 2017 ; Zhang et al, 2019 ; Mao et al, 2021 ); therefore, there are shortcomings in the accumulation of basic subject research compared with other classical subject fields.…”

Section: Multiple Challenges Facing the Future Urbanization Sciencementioning

confidence: 99%

Developing computable sustainable urbanization science: interdisciplinary perspective

Chen

et al. 2022

Comput.Urban Sci.

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In this era of drastic global change, the Anthropocene, carbon neutrality and sustainable development have become common twenty-first century human challenges and goals. Large-scale urbanization is indicative of human activities and provides an important impetus for environmental changes; therefore, cities have become an important stage in which to promote a more sustainable future development of human society. However, current researchers study urbanization issues based on the perspectives and tools of their respective disciplines; therefore, a holistic and comprehensive understanding of urbanization is lacking due to the insufficient integration of multidisciplinary study perspectives. We explored the construction of interdisciplinary computable sustainable urbanization and introduces a conceptual framework for interdisciplinary urbanization, as scientific computing supports and integrates the natural sciences and humanities to simulate urban evolution and further observe, explain, and optimize human and environment interactions in urban areas. We advocated for the establishment of major international research programs and organizations in the field of sustainable urbanization, and the cultivation of talented young professionals with broad-ranging interdisciplinary interests. Expectantly, we hope a livable planet in the Anthropocene era could be created by developing sustainable urbanization and achieving carbon neutrality.

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Global urban subway development, construction material stocks, and embodied carbon emissions

Cited by 29 publications

References 51 publications

Development patterns, material metabolism, and life-cycle greenhouse gas emissions of high-speed railway in China

Development patterns, material metabolism, and life-cycle greenhouse gas emissions of high-speed railway in China

Ability or morality? Exploring the multiple dimensions of social trust on public acceptance of urban transport infrastructure projects

Developing computable sustainable urbanization science: interdisciplinary perspective

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