The 20th and 21st joint COTA International Conference of Transportation Professionals (CICTP 2020-21)

In the traditional signal control design method, the cycle length is calculated by the approximate optimum cycle length formula proposed by Webster (1957), and each phase’s green time is distributed by the ratio of the traffic demand rate. In this study, a nonlinear programming model of signal control aiming at minimizing the average delay is developed by using the delay calculation formula of the traditional signal control calculation method. In order to verify the developed nonlinear programming model, the open source traffic simulation tool SUMO which can perform micro-traffic simulation, is used to simulate traffic of a four-leg intersection with signal under several assumed traffic demand scenarios. The results of applying the traditional signal control design method and the method developed in this study are compared. As a result, the method proposed in this study has a longer cycle time but shorter average delay time and shorter coefficient of variation (CV) of delay time than the traditional method for scenario 1,2,3, which have higher traffic demand than the left scenario.

CICTP