Abstract: Urban trafﬁc network model is illustrated by state-charts and object-diagram. However, they have limitations to show the behavioral perspective of the trafﬁc information ﬂow. Consequently, a state space model is used to calculate the half-value waiting time of vehicles. In this study, a combination of the general type-2 fuzzy logic sets and the modiﬁed backtracking search algorithm (MBSA) techniques are used in order to control the trafﬁc signal scheduling and phase succession so as to guarantee a smooth ﬂow of trafﬁc with the least wait times and average queue length. The parameters of input and output membership functions are optimized simultaneously by the novel heuristic algorithm MBSA. A comparison is made between the achieved results with those of optimal and conventional type-1 fuzzy logic controllers.
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