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Please use this identifier to cite or link to this item: http://hdl.handle.net/10481/24403

Title: Bilevel fuzzy optimization to pre-process traffic data to satisfy the law of flow conservation
Authors: de Oña, Juan
Gómez, Penélope
Mérida-Casermeiro, Enrique
Issue Date: 2011
Abstract: Traffic data obtained in the field usually have some errors. For instance, traffic volume data on the various links of a network must be consistent and satisfy flow conservation, but this rarely occurs. This paper presents a method for using fuzzy optimization to adjust observed values so they meet flow conservation equations and any consistency requirements. The novelty lies in the possibility of obtaining the best combination of adjusted values, thereby preserving data integrity as much as possible. The proposed method allows analysts to manage field data reliability by assigning different ranges to each observed value. The paper is divided into two sections: the first section explains the theory through a simple example of a case in which the data is equally reliable and a case in which the observed data comes from more or less reliable sources, and the second one is an actual application of the method in a freeway network in southern Spain where data were available but some data were missing.
Sponsorship: TRYSE Research Group, Department of Civil Engineering, University of Granada, Spain
Publisher: Elsevier
Keywords: Traffic counts
Fuzzy logic
Transport planning
Optimization
Data consistency
Subjective analyst knowledge
URI: http://hdl.handle.net/10481/24403
ISSN: 0968-090X
Citation: de Oña, J.; Gómez, P.; Mérida-Casermeiro, E. Bilevel fuzzy optimization to pre-process traffic data to satisfy the law of flow conservation. Transportation Research Part C: Emerging Technologies, 19(1): 29–39 (2011). [http://hdl.handle.net/10481/24403]
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