Reproducibility of Flow-Density Relations in Heavily Congested Flow Based on Individual Vehicle Data
The flow–density relations represent equilibrium relations between flow and density in the stationary state. Using individual vehicle data, this paper extends to heavily congested flow the reproducibility of the flow–density relations found by Cassidy. A new filtering method using standard deviations of traffic variables in a vehicle group built from individual vehicle data is proposed to distinguish the nearly stationary state from the nonstationary state. The traffic data collected from the nearly stationary state with this filtering method show significantly smaller data scattering than do those without filtering in heavily congested flow, even though the data aggregation interval is kept at the same level. This fact indicates that a reproducible flow–density relation also exists in heavily congested flow if the traffic data are collected in the nearly stationary state
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- Summary URL:
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/isbn/0309099749
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Authors:
- Kim, Youngho
- Hall, Fred L.
- Publication Date: 2006
Language
- English
Media Info
- Media Type: Print
- Features: Figures; References;
- Pagination: pp 32-39
- Monograph Title: Traffic Flow Theory 2006
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Serial:
- Transportation Research Record: Journal of the Transportation Research Board
- Issue Number: 1965
- Publisher: Transportation Research Board
- ISSN: 0361-1981
Subject/Index Terms
- TRT Terms: Statistical analysis; Traffic congestion; Traffic data; Traffic density; Traffic flow; Traffic flow theory; Traffic models
- Uncontrolled Terms: Data filtering; Flow-density relation (Traffic)
- Subject Areas: Data and Information Technology; Highways; Operations and Traffic Management; I71: Traffic Theory;
Filing Info
- Accession Number: 01031463
- Record Type: Publication
- ISBN: 0309099749
- Files: TRIS, TRB, ATRI
- Created Date: Aug 23 2006 2:13PM