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Dynamic Estimators of Origin-Destination Matrices Using Traffic Counts.
- Source :
-
Transportation Science . Nov93, Vol. 27 Issue 4, p363. 11p. - Publication Year :
- 1993
-
Abstract
- This paper proposes different "dynamic" estimators using time-varying traffic counts to obtain (discrete) time-varying OD flows or average OD flows. All the estimators can combine counts with other available information, e.g., out-dated matrices and surveys, on a general network and can be formulated as optimization problems. In the case of time-varying OD flows, two types of estimators are proposed. Simultaneous estimators produce joint estimates of the whole set of OD matrices, one for each time slice, whereas sequential estimators produce a sequence of OD estimates for successive time slices. A particular type of simultaneous and sequential estimator (namely Generalized Least Squares) was tested on the Italian Brescia-Padua motorway for which "true" OD flows over a whole day were available. Results were generally satisfactory, showing that also in the "no a priori information" case significant estimates could be obtained. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00411655
- Volume :
- 27
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- Transportation Science
- Publication Type :
- Academic Journal
- Accession number :
- 4453899
- Full Text :
- https://doi.org/10.1287/trsc.27.4.363