STATISTICAL ESTIMATION OF THE PARAMETERS OF DAGANZO'S GAP ACCEPTANCE MODEL
In a recent article in Transportation Research, Daganzo (1981) described a model of gap acceptance that permits the mean of the gap acceptance function to vary among drivers and permits the duration of the shortest acceptable gap for each driver to vary among gaps. The model contains several constant parameters whose values must be estimated statistically from observations of drivers' behavior. The results of numerical experiments reported by Daganzo (1981) suggested that the values of the parameters cannot be estimated by the method of maximum likelihood, which is the most obvious estimation technique, and Daganzo proposed using a sequential estimation method instead. The sequential method appeared to yield reasonable numerical results. In this paper, it is shown that subject to certain reasonable assumptions concerning the true parameter values and the probability distribution of gap durations, the maximum likelihood method does, in fact, yield consistent estimates of the parameters of Daganzo's model, whereas the sequential method does not. Hence, maximum likelihood is the better estimation method for this model. (Author/TRRL)
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/01912615
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Corporate Authors:
Pergamon Press, Incorporated
Headington Hill Hall
Oxford OX30BW, -
Authors:
- Horowitz, J L
- Publication Date: 1982-10
Media Info
- Features: References; Tables;
- Pagination: p. 373-381
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Serial:
- Transportation Research Part B: Methodological
- Volume: 16B
- Issue Number: 5
- Publisher: Elsevier
- ISSN: 0191-2615
- Serial URL: http://www.sciencedirect.com/science/journal/01912615
Subject/Index Terms
- TRT Terms: Behavior; Decision making; Distributions (Statistics); Drivers; Estimates; Gap acceptance; Mathematical models; Probability; Sequential analysis; Statistics; Vehicle spacing
- Uncontrolled Terms: Models
- ITRD Terms: 9001: Behaviour; 2248: Decision process; 1772: Driver; 6473: Mathematical model; 6534: Probability; 6555: Statistics; 694: Vehicle spacing
- Subject Areas: Data and Information Technology; Highways; Operations and Traffic Management; Safety and Human Factors; I71: Traffic Theory; I83: Accidents and the Human Factor;
Filing Info
- Accession Number: 00370317
- Record Type: Publication
- Source Agency: Transport Research Laboratory
- Files: ITRD, TRIS
- Created Date: Feb 28 1983 12:00AM