The coordination efficiency of an urban arterial traffic signal coordination control system is affected by many factors, such as the average speed and traffic flow. The changes of these factors will result in the reduction of coordination efficiency and affect the reliability of the coordination control system. This paper mainly studies the influence degree of average speed and traffic flow on reliability, taking the delay and the number of stops as evaluation indices. Finally, a reliability model of a coordination control system was developed. Different conditions were designed and the data under different conditions was obtained using VISSIM simulation. Based on the simulation data, the influence degree of these factors on delay and the number of stops was analyzed. The calculations of the reliability of the coordination control system under different conditions were found and the findings of this paper will provide a basis for traffic operation management in the future.
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