Based on the progression coordinated optimization principle, a graphical optimization method for bidirectional corridor progression orient to Ring-and-Barrier structure is proposed in this paper. The equivalent transformation methods of intersection distance and common signal cycle are given for unequal bidirectional progression design speed in the coordinated road section. According to the phase characteristics of the Ring-and-Barrier structure, the graphical optimization methods of phase sequence, common signal cycle, and offset are designed. The case study shows that the proposed method can achieve a significant coordinated effect. This method has the advantages of explicit principles, standardized processes, and simplified calculation, particularly suitable for engineering applications.

Signal control;Bidirectional corridor progression;Graphical method;Ring-and-Barrier structure;Principle-based optimization