气候变化领域集成服务门户(CCPortal): Global trends toward urban street-network sprawl

CCPortal

DOI	10.1073/pnas.1905232116
	Global trends toward urban street-network sprawl
	Barrington-Leigh C.; Millard-Ball A.
发表日期	2020
ISSN	0027-8424
起始页码	1941
结束页码	1950
卷号	117 期号:4
英文摘要	We present a global time series of street-network sprawl-that is, sprawl as measured through the local connectivity of the street network. Using high-resolution data from OpenStreetMap and a satellite-derived time series of urbanization, we compute and validate changes over time in multidimensional street connectivity measures based on graph-theoretic and geographic concepts. We report on global, national, and city-level trends since 1975 in the street-network disconnectedness index (SNDi), based on every mapped node and edge in the world. Streets in new developments in 90% of the 134 most populous countries have become less connected since 1975, while just 29% show an improving trend since 2000. The same period saw a near doubling in the relative frequency of a street-network type characterized by high circuity, typical of gated communities. We identify persistence in street-network sprawl, indicative of path-dependent processes. Specifically, cities and countries with low connectivity in recent years also had relatively low preexisting connectivity in our earliest time period. We discuss implications for policy intervention in road building in new and expanding cities as a top priority for sustainable urban development. © 2020 National Academy of Sciences. All rights reserved.
英文关键词	Climate change policy; Transportation; Urban development; Urban sprawl
语种	英语
scopus关键词	article; city; climate change; theoretical study; time series analysis; urbanization
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/161074
作者单位	Barrington-Leigh, C., Institute for Health and Social Policy, McGill University, Montreal, QC H3A1A3, Canada, McGill School of Environment, McGill University, Montreal, QC H3A2A7, Canada; Millard-Ball, A., Environmental Studies Department, University of California, Santa Cruz, CA 95064, United States
推荐引用方式 GB/T 7714	Barrington-Leigh C.,Millard-Ball A.. Global trends toward urban street-network sprawl[J],2020,117(4).
APA	Barrington-Leigh C.,&Millard-Ball A..(2020).Global trends toward urban street-network sprawl.Proceedings of the National Academy of Sciences of the United States of America,117(4).
MLA	Barrington-Leigh C.,et al."Global trends toward urban street-network sprawl".Proceedings of the National Academy of Sciences of the United States of America 117.4(2020).