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Mathematical Problems in Engineering
Volume 2015 (2015), Article ID 979160, 14 pages
Review Article

Fuzzy Logic in Traffic Engineering: A Review on Signal Control

1Department of Applied Informatics in Transportation, Faculty of Transportation Sciences, Czech Technical University, Konviktská 20, 110 00 Praha 1, Czech Republic
2Department of Geoinformatics, Faculty of Science, Palacký University Olomouc, 17. Listopadu 50, 771 46 Olomouc, Czech Republic

Received 1 August 2014; Accepted 17 December 2014

Academic Editor: Feng Wang

Copyright © 2015 Milan Koukol et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Since 1965 when the fuzzy logic and fuzzy algebra were introduced by Lotfi Zadeh, the fuzzy theory successfully found its applications in the wide range of subject fields. This is mainly due to its ability to process various data, including vague or uncertain data, and provide results that are suitable for the decision making. This paper aims to provide comprehensive overview of literature on fuzzy control systems used for the management of the road traffic flow at road junctions. Several theoretical approaches from basic fuzzy models from the late 1970s to most recent combinations of real-time data with fuzzy inference system and genetic algorithms are mentioned and discussed throughout the paper. In most cases, fuzzy logic controllers provide considerable improvements in the efficiency of traffic junctions’ management.