基于车均延误的预信号交叉口信号配时优化

Signal Timing Optimization for the Intersection with Pre-Signals Based on Average Vehicle Delay

为了缓解交叉口的过饱和问题,提出一种面向机动车流的交叉口预信号控制方法.即在给定的交叉口渠化以及相位相序方案下,建立主信号和预信号处机动车的延误计算模型;以交叉口车辆平均延误最小为目标,以信号配时参数和待行区长度为自变量,构建预信号交叉口的配时方案优化模型;并采用可行方向法对这两个模型进行求解.最后以典型的十字交叉口为例对所提出的方法进行验证.结果表明:当交叉口处于饱和或过饱和状态时,与传统信号控制方法相比,预信号控制方法降低车辆延误可以达到60%.

To relieve the oversaturation at intersections, the pre-signal intersection control method for motor vehi- cles was proposed. Owing to the given intersection design and phasing scheme, the calculation model of vehicle de lays at the presignal and main signal were developed. With the minimum average vehicle delay at the intersection being regarded as the optimization objective, the signal timing parameters and the length of the waiting area were chosen as independent variables, and an optimization model for the timing plan at pre-signal intersection was prord posed. The feasible direction method was used to solve the two models. Finally, a typical intersection was used as an example to test the proposed model. The results showed that compaed with traditional control method, the presignal contM method could reduce average vehicle delay as much as 60% under saturation or oversaturation condi tions.