Material Stock and Embodied Greenhouse Gas Emissions of Global and Urban Road Pavement

Lola S. A. Rousseau; Bradley Kloostra; Hessam Azarijatari

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Material Stock and Embodied Greenhouse Gas Emissions of Global and Urban Road Pavement

机译：Material Stock and Embodied Greenhouse Gas Emissions of Global and Urban Road Pavement

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Roads play a key role in movements of goods and people but require large amounts of materials emitting greenhouse gases to be produced. This study assesses the global road material stock and the emissions associated with materials' production. Our bottom-up approach combines georeferenced paved road segments with road length statistics and archetypical geometric characteristics of roads. We estimate road material stock to be of 254 Gt. If we were to build these roads anew, raw material production would emit 8.4 GtCO2-eq. Per capita stocks range from 0.2 t/cap in Chad to 283 t/cap in Iceland, with a median of 20.6 t/cap. If the average per capita stock in Africa was to reach the current European level, 166 Gt of road materials, equivalent to the road material stock in North America and in East and South Asia, would be consumed. At the urban scale, road material stock increases with the urban area, population density, and GDP per capita, emphasizing the need for containing urban expansion. Our study highlights the challenges in estimating road material stock and serves as a basis for further research into infrastructure resource management.

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来源
《Environmental Science & Technology: ES&T》 |2022年第24期|18050-18059|共10页
作者
Lola S. A. Rousseau; Bradley Kloostra; Hessam Azarijatari;
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作者单位

Industrial Ecology Programme, Department of Energy and Process Engineering NTNU -Norwegian University of Science and Technology, 7034 Trondheim, Norway;

Department of Civil & Mineral Engineering University of Toronto, Toronto, Ontario M5S 1A4, Canada;

School jor Environment and Sustainability, University of Michigan, Ann Arbor, Michigan 48109, United States;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
原文格式 PDF
正文语种英语
中图分类环境科学、安全科学;
关键词
anthropogenic material stock; built environment; road; pavement; transport infrastructure; urban areas; resource use; bottom-up approach;

Material Stock and Embodied Greenhouse Gas Emissions of Global and Urban Road Pavement

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