建立了城市平面十字路口交通流的细胞传输模型,该模型适合各种交通流状态.同时,在对信号灯配时进行优化的过程中,采用了两个控制目标,以最小延误为主要控制目标,以最大通行能力作为次要控制目标.模型采用多目标遗传算法对信号周期和绿信比进行优化.仿真结果令人较为满意. The model of cell transport for urban traffic flow at crossroads is established, which is suitable for all kinds of traffic flow conditions.At the same time, two control objectives are adopted in the optimization of traffic light timing, with the minimum delay as the main control target, Taking the maximum traffic capacity as the secondary control target, the model uses multi-objective genetic algorithm to optimize the signal period and the green signal-to-noise ratio, and the simulation result is more satisfactory.