A Two-Stage Fuzzy Logic Control Method of Traffic Signal Based on Traffic Urgency Degree

Article English OPEN
Ge, Yan (2014)
  • Publisher: Hindawi Publishing Corporation
  • Journal: Modelling and Simulation in Engineering (issn: 1687-5591, eissn: 1687-5605)
  • Related identifiers: doi: 10.1155/2014/694185
  • Subject: Electronic computers. Computer science | QA75.5-76.95 | Article Subject

City intersection traffic signal control is an important method to improve the efficiency of road network and alleviate traffic congestion. This paper researches traffic signal fuzzy control method on a single intersection. A two-stage traffic signal control method based on traffic urgency degree is proposed according to two-stage fuzzy inference on single intersection. At the first stage, calculate traffic urgency degree for all red phases using traffic urgency evaluation module and select the red light phase with large traffic urgency as the next phase to switch. At the second stage, green delay of the current green phase is determined by fuzzy inference based on the amount of vehicles of current green phase and next green phase. The average vehicle delays are used to evaluate the performance of the fuzzy signal controller. Finally, comparisons have been made with pretimed controller and fuzzy logic controller without considering the urgency of red phase. Simulation results show the performance of our proposed method.
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