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 vehicles was proposed． Owing to the given intersection design and phasing scheme，the calculation model of vehicle delays at the pre-signal 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 proposed． 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 compared with traditional control method，the presignal control method could reduce average vehicle delay as much as 60% under saturation or oversaturation conditions．