A fuzzy logic controller for traffic junction signals

In this paper a fuzzy logic based traffic junction signal controller (FTJSC) is presented. In order to design a more practical controller, we simulated an environment that meets the traffic situations more than ever. This environment is generalized by considering the number of consecutive junctions, the number of lanes, the lengths of vehicles, and the lengths of streets. Compared with existing studies, the proposed fuzzy controller has the following characteristics: different input variables, lower inference frequency, fewer control rules (9 rules), and correlating each junction with others. It is applicable to multiple junctions and multiple lanes without any modification. The experimental results with low, medium and high traffic loads confirm the performance of the proposed FTJSC. (C) 2002 Published by Elsevier Science Inc.