Developing a New Spatial Unit for Macroscopic Safety Evaluation Based on Traffic Density Homogeneity
Joint Authors
Wang, Chen
Liu, Lin
Xu, Chengcheng
Source
Journal of Advanced Transportation
Issue
Vol. 2020, Issue 2020 (31 Dec. 2020), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2020-01-22
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Abstract EN
Macrolevel crash modeling has been extensively applied to investigate the safety effects of demographic, socioeconomic, and land use factors, in order to add safety knowledge into traffic planning and policy-making.
In recent years, with the increasing attention to regional traffic management and control, the safety effects of macrolevel traffic flow parameters may also be of interest, in order to provide useful safety knowledge for regional traffic operation.
In this paper, a new spatial unit was developed using a recursive half-cut partitioning procedure based on a normalized cut (NC) minimization method and traffic density homogeneity.
Two Bayesian lognormal models with different conditional autoregressive (CAR) priors were applied to examine the safety effects of traffic flow characteristics at the NC level.
It was found that safety effects of traffic flow exist at such macrolevel, indicating the necessity of considering safety for regional traffic control and management.
Furthermore, traffic flow effects were also examined for another two spatial units: Traffic Analysis Zone (TAZ) and Census Tract (CT).
It was found that ecological fallacy and atomic fallacy could exist without considering traffic flow parameters at those planning-based levels.
In general, safety needs to be considered for regional traffic operation and the effects of traffic flow need to be considered for spatial crash modeling at various spatial levels.
American Psychological Association (APA)
Wang, Chen& Liu, Lin& Xu, Chengcheng. 2020. Developing a New Spatial Unit for Macroscopic Safety Evaluation Based on Traffic Density Homogeneity. Journal of Advanced Transportation،Vol. 2020, no. 2020, pp.1-9.
https://search.emarefa.net/detail/BIM-1175362
Modern Language Association (MLA)
Wang, Chen…[et al.]. Developing a New Spatial Unit for Macroscopic Safety Evaluation Based on Traffic Density Homogeneity. Journal of Advanced Transportation No. 2020 (2020), pp.1-9.
https://search.emarefa.net/detail/BIM-1175362
American Medical Association (AMA)
Wang, Chen& Liu, Lin& Xu, Chengcheng. Developing a New Spatial Unit for Macroscopic Safety Evaluation Based on Traffic Density Homogeneity. Journal of Advanced Transportation. 2020. Vol. 2020, no. 2020, pp.1-9.
https://search.emarefa.net/detail/BIM-1175362
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1175362