城市单点交叉口时空一体化信号优化研究

Research on Spatio-temporal Integration Signal Optimizationat Urban Single-point Intersections

为了缓解城市道路承担巨大交通负荷的交叉口交通拥堵问题,提出了交叉口时空一体化优化控制的思想。文中以内江市汉安大道-甜城大道为例,调查分析其现有问题,提出时空一体化信号控制优化方案,即东进口借对向车道左转、交叉口整体信号相位相序优化、信号配时优化、分时段精细化信号配时。通过对比,该方案交叉口车辆最大排队长度优化率达69.86%,停车次数从4-5次减少为1.2次,早高峰期提前20-30分钟结束,交叉口的时空资源得到了更为有效的利用,明显缓解了交叉口的交通压力,为城市主要交叉口的运营、规划和管理提供了借鉴和参考。

In order to alleviate the traffic congestion problem at the intersection where the urban road bears a huge traffic load,the idea of optimizing the control of the intersection spatio-temporal integration is proposed.This paper takes Han'an Avenue-Tiancheng Avenue in Neijiang City as an example,investigates and analyzes its existing problems,and proposes a spatio-temporal integration signal control optimization program,that is the east entrance takes a left turn in the opposite lane,optimizes the overall signal phase sequence of the intersection,optimizes the signal timing,and refines the signal timing by time period.Through comparison,the optimization rate of the maximum queue length of vehicles at the intersection of the scheme reached 69.86%,the number of stops was reduced from 4-5 to 1.2,and the morning peak period ended 20-30 minutes earlier.The spatio-temporal resources of the intersection have been more effectively utilized,which has significantly alleviated the traffic pressure of the intersection and provided reference for the operation,planning and management of the main intersection of the city.