期刊
COMPUTERS ENVIRONMENT AND URBAN SYSTEMS
卷 52, 期 -, 页码 34-47出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compenvurbsys.2015.03.001
关键词
Functionally critical network location; Space-time analysis; Taxi trajectory; Functional region
类别
资金
- National Science Foundation of China [41231171, 41371420, 61170202]
- National High-tech R&D Program of China [2012AA12A403-4]
- Shenzhen Dedicated Funding of Strategic Emerging Industry Development Program [JCYJ20121019111128765]
- Funding for Excellent Talents in Wuhan University
This paper studies the space-time properties of locations that are critical to travel activities in an urban environment. Specifically, we analyze locations on the urban street network from the perspective of the distribution of people's travel trajectories. We identify the intersections of an urban transportation network which are characterized by good connectivity, serving a high density of trip trajectories, and exhibiting multiple traversing patterns of trip trajectories as potential functionally critical network locations (FCNLs). A geospatial method is proposed to extract FCNLs from people's moving trajectories based on the street network. Two groups of quantitative indices are introduced to measure the evolution of the spatial extent and temporal variation patterns of different criticality levels of FCNLs. A case study using taxi trajectory data from Wuhan, China has been implemented. The results show that the FCNLs are very powerful in uncovering the space-time traveling patterns of a particular population and studying the relationship between urban functional structures and people's activities. (C) 2015 Elsevier Ltd. All rights reserved.
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