Understanding the marginal distributions and correlations of link travel speeds in road networks

Abstract Link travel speeds in road networks are essential data for a variety of research problems in logistics, transportation, and traffic management. Real-world link travel speeds are stochastic, and highly dependent on speeds in previous time periods and neighboring road links. To understand how...

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Autores principales:	Feng Guo, Xin Gu, Zhaoxia Guo, Yucheng Dong, Stein W. Wallace
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2020
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/ef24fe18e5884a55b5a8ea45ff56ebc1
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spelling	oai:doaj.org-article:ef24fe18e5884a55b5a8ea45ff56ebc12021-12-02T15:33:11ZUnderstanding the marginal distributions and correlations of link travel speeds in road networks10.1038/s41598-020-68810-92045-2322https://doaj.org/article/ef24fe18e5884a55b5a8ea45ff56ebc12020-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-020-68810-9https://doaj.org/toc/2045-2322Abstract Link travel speeds in road networks are essential data for a variety of research problems in logistics, transportation, and traffic management. Real-world link travel speeds are stochastic, and highly dependent on speeds in previous time periods and neighboring road links. To understand how link travel speeds vary over space and time, we uncover their distributions, their space- and/or time-dependent correlations, as well as partial correlations, based on link travel speed datasets from an urban road network and a freeway network. We find that more than 90% (57%) of travel speeds are normally distributed in the urban road (freeway) network, and that correlations generally decrease with increased distance in time and space. We also investigate if and how different types of road links affect marginal distributions and correlations. The results show that different road link types produce quite similar marginal distributions and correlations. Finally, we study marginal distributions and correlations in a freeway network. Except that the marginal distribution and time correlation are different from the urban road network, others are similar.Feng GuoXin GuZhaoxia GuoYucheng DongStein W. WallaceNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 10, Iss 1, Pp 1-8 (2020)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Feng Guo Xin Gu Zhaoxia Guo Yucheng Dong Stein W. Wallace Understanding the marginal distributions and correlations of link travel speeds in road networks
description	Abstract Link travel speeds in road networks are essential data for a variety of research problems in logistics, transportation, and traffic management. Real-world link travel speeds are stochastic, and highly dependent on speeds in previous time periods and neighboring road links. To understand how link travel speeds vary over space and time, we uncover their distributions, their space- and/or time-dependent correlations, as well as partial correlations, based on link travel speed datasets from an urban road network and a freeway network. We find that more than 90% (57%) of travel speeds are normally distributed in the urban road (freeway) network, and that correlations generally decrease with increased distance in time and space. We also investigate if and how different types of road links affect marginal distributions and correlations. The results show that different road link types produce quite similar marginal distributions and correlations. Finally, we study marginal distributions and correlations in a freeway network. Except that the marginal distribution and time correlation are different from the urban road network, others are similar.
format	article
author	Feng Guo Xin Gu Zhaoxia Guo Yucheng Dong Stein W. Wallace
author_facet	Feng Guo Xin Gu Zhaoxia Guo Yucheng Dong Stein W. Wallace
author_sort	Feng Guo
title	Understanding the marginal distributions and correlations of link travel speeds in road networks
title_short	Understanding the marginal distributions and correlations of link travel speeds in road networks
title_full	Understanding the marginal distributions and correlations of link travel speeds in road networks
title_fullStr	Understanding the marginal distributions and correlations of link travel speeds in road networks
title_full_unstemmed	Understanding the marginal distributions and correlations of link travel speeds in road networks
title_sort	understanding the marginal distributions and correlations of link travel speeds in road networks
publisher	Nature Portfolio
publishDate	2020
url	https://doaj.org/article/ef24fe18e5884a55b5a8ea45ff56ebc1
work_keys_str_mv	AT fengguo understandingthemarginaldistributionsandcorrelationsoflinktravelspeedsinroadnetworks AT xingu understandingthemarginaldistributionsandcorrelationsoflinktravelspeedsinroadnetworks AT zhaoxiaguo understandingthemarginaldistributionsandcorrelationsoflinktravelspeedsinroadnetworks AT yuchengdong understandingthemarginaldistributionsandcorrelationsoflinktravelspeedsinroadnetworks AT steinwwallace understandingthemarginaldistributionsandcorrelationsoflinktravelspeedsinroadnetworks
_version_	1718387119194374144

Understanding the marginal distributions and correlations of link travel speeds in road networks

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