基于公交优先的道路交叉口可变相位多层模糊控制

Variable Phase and Multilayer Fuzzy Intersection Control Based on the Transit Priority Strategy

针对城市道路交叉口的交通信号控制及公交优先问题,结合模糊控制理论及公交优先思想,提出了一种基于公交优先的单路口多层模糊控制模型.第一层是完成道路交叉口进口道各流向的交通需求强度判断,第二层是完成信号相位相序的优化调整,第三层是完成各相位绿灯时间是否延长及延长多少的判断,第四层是在每个周期末完成信号相位数的自适应选择判断.该模型借助Matlab6.5进行交通仿真计算,并与定时信号控制相比较,应用结果表明该模型在信号控制方面的优越性,实现道路交叉口的车均延误和人均延误最小的优化控制.

According to the signal control and bus priority strategies in urban intersectionsD this paper puts forward the muhilayer fuzzy control model based on the bus priority single intersections, combined with the fuzzy control theory. The first layer is to estimate traffic demand of each direction. The second is to optimize and adjust the phase sequences. The third is to decide whether to extend the green phase and how long to extend. The last is to finish the phases adaptive choice and judgment at the end oI each cycle. The simulation was carried out by Matlab6.5. Compared to the pre-timed control j the results show the su- periority of the model. The model can minimize the average delay of vehicles and persons in the intersection.