Optimal Signal Timing Design For Intersection Control With The Idea Of Bus Rapid Transit

As implementing transit first policy actively in Chinese cities, Bus Rapid Transit (BRT) as a costly and efficiently mass (or intermediate) transit mode has been paid comprehensive attention and been explored actively. However, there are some shortcomings at study on BRT priority technologies at signal intersection. So, based on literatures about transit priority in exist, this paper studies on the methods of spatial and temporal BRT priority technologies at signal intersection.The paper mainly adopts theory analysis in studying progress, complementing with a little demonstration at the same time. It applies deduction, induction, method such as determining the nature, determining the amounts of the components of a substance to theory synthetically in studying, and it also synthesizes multidisciplinary theory to be in progress, studying synthetically from many visual angles, many sides, the multiple echelons field. It simultaneity adopts the analogy and contrast.Firstly, According to the characteristics and the goals of optimizing design of BRT signal intersection, the efficiency problems as introduced BRT are analyzed. Then, the design methods and selection of spatial BRT priority technologies are studied. To solve the problems of transit signal passive priority methods, an improved method based on the delay model of HCM2000 is provided, and the delay impact of early green and extended green to BRT phase, on-priority phase and whole intersection, and signal timing adjective conditions of BRT active priority are analyzed. Then, a microscopic simulation tool, VISSIM, is applied for analyzing the two strategies, using VISVAP module to program control logic and VAP language to program phase transition. Having compared the results of BRT active priority and fixed timing simulation, the results show that the new method can reduce BRT delay by active priority strategies application effectively.