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Title	SOME OBSERVATIONS ON SPEED-FLOW AND FLOW-OCCUPANCY RELATIONSHIPS UNDER CONGESTED CONDITIONS
Accession No	00638673
Authors	Hall, F L; Pushkar, A; SHI, Y
Journal Title	Transportation Research Record No. 1398
Corp. Authors / Publisher	Transportation Research Board
Publication Date	19930000
Description	p. 24-30; Figures(11); References(16)
Languages	English
Abstract	There is a need for a better understanding of freeway operations under congested conditions. Not only are major freeways in many cities congested several hours a day, but for intelligent vehicle-highway system programs to be able to function effectively under all conditions, aggregate traffic behavior under all conditions needs to be accurately modeled. Three models for congested flow-occupancy data have been put forward in the past. Using data from the Highway 401 freeway management system in Toronto, evidence in support of any of those is sought, as it is for implied models of speed-flow relationships. The data suggest that all three models can be supported. Each may be appropriate under different conditions.
Supplemental Information	This paper appears in Transportation Research Record No. 1398, Traffic Flow and Highway Capacity.
TRT Terms	Flow speed relationships ; Freeway operations ; Intelligent transportation systems ; Traffic congestion ; Traffic flow ; Traffic simulation ; Traffic speed
Other Terms	Flow occupancy relationship; Intelligent vehicle highway systems; Speed flow relationship; Traffic simulation models
Subject Areas	H55 TRAFFIC FLOW, CAPACITY AND MEASUREMENTS; I71 Traffic Theory
ISBN	0309054672
Availability	Transportation Research Board Business Office Find a library where document is available Order Document: http://worldcat.org/isbn/0309054672
TRIS Files	HRIS
Database	TRIS Online

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